CN102478873A - Power supply modulator - Google Patents
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- CN102478873A CN102478873A CN2010105588469A CN201010558846A CN102478873A CN 102478873 A CN102478873 A CN 102478873A CN 2010105588469 A CN2010105588469 A CN 2010105588469A CN 201010558846 A CN201010558846 A CN 201010558846A CN 102478873 A CN102478873 A CN 102478873A
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Abstract
The invention discloses a power supply modulator, comprising: a switching mode power regulator and a linear power regulator connected in parallel; the method is characterized in that the linear power supply regulator adopts a non-direct current power supply to supply power. The power supply modulator provided by the invention adopts a non-direct current power supply mode, changes the traditional mode of adopting a direct current power supply to supply power to the linear power supply regulator, and overcomes the problem of low original efficiency.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to a power supply modulator.
Background
In electronic devices, there are many occasions where voltage modulation is required, and a typical one of them is a power supply device of a radio frequency power amplifier.
In order to meet the increasing demand of users for bandwidth, the modulation mode of the communication system becomes more and more complex, and one of the outstanding problems is that the efficiency of the radio frequency power amplifier is low, which becomes a bottleneck for improving the efficiency of the whole communication system. For a linear power amplifier, in order to ensure linearity, the power supply voltage needs to be higher than the peak voltage of a radio frequency signal in a conventional direct current power supply mode. When the amplitude of the rf signal is low, the Power amplifier is subjected to a high voltage and a high load current, so that the efficiency is low, and the Average efficiency of the Power amplifier depends on a Peak to Average Power Ratio (PAPR) of the rf signal. Modern communication systems use non-constant envelope (amplitude) modulation schemes with high peak-to-average ratio in order to obtain maximum communication bandwidth in a limited frequency band. For example, the peak-to-average ratio of the modulation signal in wcdma (wideband Code Division Multiple access) system is 6.5dB to 7.0dB, while the peak-to-average ratio of the OFDMA (Orthogonal Frequency Division Multiple access) system used in the next generation network lte (long term evolution) and WiMax is even as high as 9.0dB to 9.5dB, which results in low efficiency of the power amplifier. Therefore, a series of other problems such as increased power amplifier volume and weight, higher requirements for heat dissipation environment such as air conditioners and the like are brought, and the application and maintenance cost is increased. Therefore, it is of great practical significance to improve the efficiency of the power amplifier.
In the existing documents and technologies, the power amplifier efficiency improvement scheme depending on the power supply technology mainly includes: envelope isolation and Restoration (EER) and Envelope Tracking (ET). The envelope separation and recovery technology utilizes the characteristic that a constant envelope signal can be efficiently amplified through a nonlinear power amplifier to separate a radio frequency signal to be amplified into an envelope signal and a phase modulation signal, and an envelope tracking power supply supplies power to the nonlinear power amplifier to restore the amplified radio frequency signal. The amplitude of the amplified signal is determined by the amplitude of the output voltage of the envelope tracking power supply, so that the tracking precision of the envelope tracking power supply is high, and otherwise, the linearity of the amplified signal is influenced. And the envelope tracking power supply mode adopts a linear power amplifier, and the power supply voltage is dynamically adjusted by tracking an envelope signal, so that the efficiency of the linear power amplifier is improved. Both schemes require dynamic modulation of the output voltage of the power supply. The power modulator must guarantee high efficiency at the same time, and the efficiency improvement of the whole power amplifier system by the two schemes can be guaranteed.
In modern communication systems, the rf envelope signal has a relatively high bandwidth, for example, WCDMA single carrier is 5MHz, and 4 carriers are 20 MHz. Envelope tracking power supplies are required to provide high modulation bandwidth and efficiency, and in the prior art, switching mode power regulators can provide high conversion efficiency. However, in applications that satisfy high bandwidths such as 20MHz, extremely high switching speeds are required, which cannot be achieved by existing switching devices, and the conversion efficiency of the regulator is therefore low.
In another prior art, the switching speed can be reduced by adopting a multi-level output mode, for example, a Class-G mode of switching multiple input voltages is adopted, as shown in fig. 1, to obtain multiple tracking levels 104, coupling devices such as inductors are not needed, the bandwidth can be greatly improved, and the efficiency is higher because the high-efficiency dc voltage sources 101, 102 and 103 are directly switched in. However, under the restriction of the switching speed and the switching loss of the existing switching device, the existing switching type multi-level scheme adopts an open-loop mode, and the tracking accuracy is low. In addition, there is unavoidable switching ripple to further reduce the tracking accuracy, so that the further improvement technique of the switching type high bandwidth power regulator is to be applied in combination with a linear power regulator, as shown in fig. 2, to provide smooth switching and higher tracking accuracy by negative feedback control of the linear power regulator 202.
However, in the existing technology of combining the switching power regulator and the linear power regulator, the linear power regulator still adopts the traditional direct current power supply mode, and the efficiency is low.
Disclosure of Invention
The invention provides a power supply modulator, which is used for solving the problem that the linear power supply regulator in the prior art is low in efficiency by adopting a traditional direct current power supply mode.
Specifically, the present invention provides a power modulator, including: a switching mode power regulator and a linear power regulator connected in parallel; the method is characterized in that the linear power supply regulator adopts a non-direct current power supply to supply power.
The linear power supply regulator adopts a non-direct-current power supply mode and comprises the following steps:
supplying power to the linear power regulator by the switching power regulator; or,
supplying power to the linear power regulator from a total output voltage of the power modulator; or,
the power supply modulator is provided with a second switch-type power supply regulator, and the second switch-type power supply regulator supplies power to the linear power supply regulator; and the input signal of the second switch type power supply regulator is the reference signal to be tracked.
Preferably, the power modulator of the present invention further has the following features:
the power supply modulation circuit further includes:
the first bias power supply is used for carrying out bias voltage processing on the power supply voltage to be input into the linear power supply regulator and then outputting the power supply voltage to the positive terminal of the linear power supply regulator; and/or;
and the second bias power supply is used for carrying out bias voltage processing on the power supply voltage to be input into the linear power supply regulator and then outputting the power supply voltage to the negative electrode end of the linear power supply regulator.
The power modulator further includes:
and the impedance matching circuit is used for filtering the output voltages of the switch type power supply regulator and the linear power supply regulator and then outputting the filtered output voltages.
The power modulator further includes: and the delay circuit is used for compensating the circuit time delay between the switch type power supply regulator and the linear power supply regulator.
In the power modulator, an output voltage of the linear power regulator forms a closed loop circuit as a feedback signal of the linear power regulator.
Or, in the power supply modulator, the total output voltage of the power supply modulator is used as a feedback signal of the linear power supply regulator to form a closed loop circuit.
In the power modulator of the present invention, the impedance matching circuit includes a low-pass filter and a high-pass filter;
the low-pass filter is connected with the switch-type power supply regulator and is used for performing low-pass filtering processing on the output voltage of the switch-type power supply regulator;
and the high-pass filter is connected with the linear power supply regulator and is used for carrying out high-pass filtering processing on the output voltage of the linear power supply regulator.
The invention has the following beneficial effects:
the power supply modulator provided by the invention adopts a non-direct current power supply mode, changes the traditional mode of adopting a direct current power supply to supply power to the linear power supply regulator, and overcomes the problem of low original efficiency; and when the switch-type power supply regulator is adopted for supplying power, the characteristic that the switch-type power supply regulator tracks the reference envelope signal can be well utilized, the output of the reference envelope signal is simultaneously supplied to the linear power supply regulator, the power supply voltage modulation function that the power supply voltage of the linear power supply regulator is lower when the output voltage is lower is realized, the efficiency of the linear power supply regulator can be improved while the output tracking precision and the bandwidth of the power supply modulator are ensured to the maximum extent under the condition of not increasing the cost and the circuit complexity, and the efficiency of the system is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a switching power regulator in the prior art;
FIG. 2 is a schematic diagram of a combination of a switching regulator and a linear regulator in the prior art;
fig. 3 is a schematic structural diagram of a power modulator provided in the present invention;
fig. 4 is a schematic structural diagram of another power modulator provided by the present invention;
fig. 5 is a schematic structural diagram of yet another power modulator provided in the present invention;
fig. 6 is a schematic voltage waveform of the power modulator according to the first embodiment of the present invention;
fig. 7 is a schematic structural diagram of a power modulator according to a second embodiment of the present invention;
fig. 8 is a schematic voltage waveform of the power modulator according to the second embodiment of the present invention;
fig. 9 is a schematic structural diagram of a power modulator according to a third embodiment of the present invention;
fig. 10 is a schematic voltage waveform of the power modulator according to the third embodiment of the present invention;
fig. 11 is a schematic structural diagram of a power modulator according to a fourth embodiment of the present invention;
fig. 12 is a schematic structural diagram of a power modulator according to a fifth embodiment of the present invention;
fig. 13 is a schematic structural diagram of a power modulator according to a sixth embodiment of the present invention;
fig. 14 is a schematic structural diagram of an impedance matching circuit according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to solve the problem that the linear power supply regulator in the prior art adopts the traditional direct current power supply mode and has lower efficiency, the invention provides the power supply modulator which can improve the efficiency of the system while ensuring the output tracking precision and the bandwidth of the power supply modulator to the maximum extent; the power supply modulator can be used in occasions with tracking modulation requirements on power supply voltage, such as an envelope tracking radio frequency signal power amplifier, and the like, wherein the power supply for the envelope tracking radio frequency signal power amplifier can improve the efficiency of the radio frequency signal power amplifier; in addition, the power supply modulator can also be independently used as a power amplifier, such as an audio signal amplifier and the like.
Specifically, the present invention provides a power modulator, including: a switching mode power regulator and a linear power regulator connected in parallel; the method is characterized in that the linear power supply regulator adopts a non-direct current power supply to supply power.
The linear power supply regulator adopts a non-direct-current power supply mode and comprises the following steps:
as shown in fig. 3, a linear power regulator is powered by the switching power regulator; or,
as shown in fig. 4, the linear power supply regulator is powered by the total output voltage of the power supply modulator; or,
as shown in fig. 5, a second switching power supply regulator is provided in the power supply modulator, and the linear power supply regulator is supplied with power by the second switching power supply regulator; and the input signal of the second switch type power supply regulator is the reference signal to be tracked.
Based on the above power supply mode, the power supply modulator provided by the present invention further includes at least one of the following technical features, or a combination of the following technical features, specifically as follows:
the power modulator further includes:
the first bias power supply is used for carrying out bias voltage processing on the power supply voltage to be input into the linear power supply regulator and then outputting the power supply voltage to the positive terminal of the linear power supply regulator;
the second bias power supply is used for carrying out bias voltage processing on the power supply voltage to be input into the linear power supply regulator and then outputting the power supply voltage to the negative electrode end of the linear power supply regulator;
the impedance matching circuit is used for filtering the output voltages of the switch type power supply regulator and the linear power supply regulator and then outputting the filtered output voltages;
a delay circuit for compensating a circuit delay between the switching power regulator and the linear power regulator;
in the power supply modulator, an output voltage of the linear power supply regulator is used as a feedback signal of the linear power supply regulator to form a closed loop circuit, or in the power supply modulator, a total output voltage of the power supply modulator is used as a feedback signal of the linear power supply regulator to form a closed loop circuit; of course, the two resulting closed loop circuit approaches do not appear in combination, but only in one.
The power supply modulator provided by the invention adopts a non-direct current power supply mode, changes the traditional mode of adopting a direct current power supply to supply power to the linear power supply regulator, and overcomes the problem of low original efficiency; and when the switch-type power supply regulator is adopted for supplying power, the characteristic that the switch-type power supply regulator tracks the reference envelope signal can be well utilized, the output of the reference envelope signal is simultaneously output to supply power to the linear power supply regulator, the power supply voltage modulation function that the power supply voltage of the linear power supply regulator is lower when the output voltage is lower is realized, and the efficiency of the linear power supply regulator is improved under the condition that the cost and the circuit complexity are not increased.
Several preferred embodiments of the present invention are given below with reference to fig. 6 to 14, and the technical details of the present invention are further given in conjunction with the description of the embodiments, so that the specific implementation process of the method provided by the present invention can be better explained. The embodiments described below are, of course, merely exemplary of several preferred implementations and are not exhaustive of the embodiments of the invention. The method specifically comprises the following steps:
example one
The present embodiment provides a power supply modulator, whose structure diagram is shown in fig. 3, where the power supply modulator specifically includes: a switching mode power supply regulator 301 and a linear power supply regulator 302;
the switch mode power supply regulator 301 is connected in parallel with the linear power supply regulator 302, and the switch mode power supply regulator 301 supplies power to the linear power supply regulator 302; the switching power regulator 301 is powered by a dc power supply;
the working principle of the power supply modulator is as follows: after the tracking reference signal 305 is input to the switching mode power supply regulator 301 and the linear power supply regulator 302, the switching mode power supply regulation and the linear power supply regulation are respectively performed to obtain output voltages 303 and 304, and then the output voltages 303 and 304 are combined into a total output voltage 306 of the power supply modulator.
The power supply modulator provided by the embodiment supplies power to the linear power supply regulator 302 through the switch-mode power supply regulator 301, so that the problem that the linear power supply regulator 302 in the prior art directly adopts a traditional direct-current power supply to supply power and has low efficiency is solved. The power supply modulator of the embodiment utilizes the characteristic that the switch-type power supply regulator also tracks the reference envelope signal, outputs the reference envelope signal and simultaneously supplies power to the linear power supply regulator, so that the power supply voltage modulation function that the power supply voltage of the linear power supply regulator is lower when the output voltage is lower is realized, the efficiency of the linear power supply regulator is improved under the condition that the cost and the circuit complexity are not increased, and the efficiency of a system is further improved. As shown in fig. 6, the output voltage waveform obtained by using the power modulator of the present embodiment is shown; here, 401 is the output voltage waveform of the switching regulator 301, and 402 is the output voltage waveform of the linear regulator 302.
Example two
As shown in fig. 7, the power modulator provided in this embodiment specifically includes: a switching mode power supply regulator 301 and a linear power supply regulator 302; the switch mode power supply regulator 301 is connected in parallel with the linear power supply regulator 302, and the switch mode power supply regulator 301 supplies power to the linear power supply regulator 302; the switching power regulator 301 is powered by a dc power supply;
further, the power supply modulator further includes: a first bias power supply 501, an impedance matching circuit 502 and a delay circuit 503; wherein:
the first bias power supply 501 is configured to perform bias voltage processing on the power supply voltage output by the switching mode power supply regulator 301 to the linear power supply regulator 302 and output the power supply voltage to the linear power supply regulator 302, so as to more effectively ensure that the power supply voltage of the linear power supply regulator 302 is higher than the output voltage;
the impedance matching circuit 502 is used for filtering the output voltage 303 of the switch-mode power supply regulator 301 and the output voltage 304 of the linear power supply regulator and then outputting the filtered output voltages;
and the delay circuit 503 is configured to perform delay processing on the reference signal to be tracked input to the linear power regulator 302 to compensate for different circuit delays of the switching mode power regulator 301 and the linear power regulator 302.
Preferably, the output voltage 304 of the linear power regulator 302 is used as a feedback signal to form a closed loop circuit, thereby further improving the tracking accuracy.
As shown in fig. 8, the supply voltage waveform generated by the power modulator according to this embodiment is shown, where 601 is the voltage waveform of the output voltage 303 of the switching power regulator 301 after passing through the first bias power supply 501, and 602 is the output voltage 304 waveform of the linear power regulator 302. It can be seen from the figure that the power modulator of the present embodiment is more practical.
EXAMPLE III
As shown in fig. 9, the power modulator provided in this embodiment specifically includes:
a switching mode power supply regulator 301, a linear power supply regulator 302, a first bias power supply 501, an impedance matching circuit 502 and a delay circuit 503;
the switch mode power supply regulator 301 is connected in parallel with the linear power supply regulator 302, and the switch mode power supply regulator 301 supplies power to the linear power supply regulator 302; the switching power regulator 301 is powered by a dc power supply;
a first bias power supply 501, configured to perform bias voltage processing on a supply voltage output by the switching power supply regulator 301 to the linear power supply regulator 302, and output the processed supply voltage to the linear power supply regulator 302;
the impedance matching circuit 502 is used for filtering the output voltage 303 of the switch-mode power supply regulator 301 and the output voltage 304 of the linear power supply regulator and then outputting the filtered output voltages;
and the delay circuit 503 is configured to perform delay processing on the reference signal to be tracked input to the linear power regulator 302 to compensate for different circuit delays of the switching mode power regulator 301 and the linear power regulator 302.
Further, the switch mode power supply regulator 301 according to this embodiment also supplies power to the negative terminal of the linear power supply regulator 302;
preferably, the power supply modulator according to this embodiment further includes a second bias power supply 702, where the second bias power supply 702 is configured to bias the power supply voltage output by the switching power supply regulator 301 and output the biased power supply voltage to the negative terminal of the linear power supply regulator 302.
As shown in fig. 10, the supply voltage waveforms generated by the power supply modulator provided in this embodiment include 801 a voltage waveform obtained by passing the output voltage 303 of the switching power supply regulator 301 through the first bias power supply 501, 802 a voltage waveform obtained by passing the output voltage 304 of the linear power supply regulator 302, and 803 a voltage waveform obtained by passing the output voltage 303 of the switching power supply regulator 301 through the second bias power supply 702. The power supply modulator according to this embodiment can track the voltages of the positive and negative terminals, so that the loss of the linear power supply regulator 302 is smaller.
Example four
As shown in fig. 11, the power modulator provided in this embodiment specifically includes:
a switching mode power supply regulator 301 and a linear power supply regulator 302; the switch mode power supply regulator 301 is connected in parallel with the linear power supply regulator 302, and the switch mode power supply regulator 301 supplies power to the linear power supply regulator 302; the switching power regulator 301 is powered by a dc power supply;
the power supply modulator further includes: a first bias power supply 501, an impedance matching circuit 502 and a delay circuit 503; wherein:
the bias power supply 501 is used for performing bias voltage processing on the power supply voltage output by the switch-mode power supply regulator 301 to the linear power supply regulator 302 and then outputting the power supply voltage to the linear power supply regulator 302;
the impedance matching circuit 502 is used for filtering the output voltage 303 of the switch-mode power supply regulator 301 and the output voltage 304 of the linear power supply regulator and then outputting the filtered output voltages;
and the delay circuit 503 is configured to perform delay processing on the reference signal to be tracked input to the linear power regulator 302 to compensate for different circuit delays of the switching mode power regulator 301 and the linear power regulator 302.
Further, the power modulator according to the embodiment forms a closed loop circuit by using the total output voltage 306 of the power modulator as a feedback signal of the linear power regulator 302.
The embodiment can not only more effectively ensure that the supply voltage of the linear power regulator 302 is higher than the output voltage, but also further improve the tracking accuracy.
EXAMPLE five
As shown in fig. 12, a power supply modulator according to an embodiment of the present invention includes: a switch mode power supply regulator 301, a linear power supply regulator 302, a first bias power supply 501, an impedance matching circuit 502 and a delay circuit 503; the switching mode power supply regulator 301 and the linear power supply regulator 302 are connected in parallel, and the output voltage 303 of the switching mode power supply regulator 301 and the output voltage 304 of the linear power supply regulator 302 are processed by the impedance matching circuit 502 to output a total voltage 306;
in this embodiment, the linear power regulator 302 supplies power by using the total output voltage 306 of the voltage modulator;
the first bias power supply 501 is configured to perform voltage bias processing on the power supply voltage input to the linear power supply regulator 302, and output the processed power supply voltage to the linear power supply regulator 302.
Of course, this embodiment may further improve the tracking accuracy by adding a feedback loop.
EXAMPLE six
As shown in fig. 13, a power supply modulator according to an embodiment of the present invention includes: a switching mode power supply demodulator 301, a linear power supply regulator 302, an impedance matching circuit 502, a delay circuit 503, and a second switching mode power supply regulator 308;
the switching mode power supply regulator 301 and the linear power supply regulator 302 are connected in parallel, and the output voltage 303 of the switching mode power supply regulator 301 and the output voltage 304 of the linear power supply regulator 302 are processed by the impedance matching circuit 502 to output a total voltage 306;
the present embodiment employs the second switch mode power regulator 308 to supply power to the linear power regulator 302; preferably, the output voltage of the second switching power regulator 307 can be processed by a bias power supply to supply power to the linear power regulator 302.
Of course, in this embodiment, the tracking accuracy and the like can be further improved by adding a feedback loop.
In the first to sixth embodiments:
the output voltage 303 of the switching power regulator 301 may roughly track the reference signal 305, which may be configured as, but not limited to, a high bandwidth multi-level voltage source, such as Class-G shown in fig. 1;
the output voltage 304 of the linear power regulator 302 accurately tracks the input reference signal 305, and may be, but is not limited to, a conventional Class-A, push-pull push-pull configuration.
Further, in the above embodiment:
the impedance matching circuit 502 is configured as shown in fig. 14, and includes a combination of a low-pass filter and a high-pass filter. The output voltage 303 of the switched-mode power supply regulator 301 is connected to a low-pass filter, the output voltage 304 of the linear power supply regulator 302 is connected to a high-pass filter, and the outputs of the high-pass filter and the low-pass filter are combined to form the total output voltage 306 of the power supply modulator. In particular, the low-pass filter and the high-pass filter may be composed of passive elements of inductance, resistance, capacitance, and the like.
The power supply modulator provided by the invention adopts a non-direct current power supply mode, changes the traditional mode of adopting a direct current power supply to supply power to the linear power supply regulator, and overcomes the problem of low original efficiency; and when the switch-type power supply regulator is adopted for supplying power, the characteristic that the switch-type power supply regulator tracks the reference envelope signal can be well utilized, the output of the reference envelope signal is simultaneously output to supply power to the linear power supply regulator, the power supply voltage modulation function that the power supply voltage of the linear power supply regulator is lower when the output voltage is lower is realized, and the efficiency of the linear power supply regulator is improved under the condition that the cost and the circuit complexity are not increased.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (11)
1. A power modulator, comprising: a switching mode power regulator and a linear power regulator connected in parallel; the method is characterized in that the linear power supply regulator adopts a non-direct current power supply to supply power.
2. The power modulator of claim 1, wherein the linear power regulator is powered by a non-dc power source comprising:
supplying power to the linear power regulator by the switching power regulator; or,
supplying power to the linear power regulator from a total output voltage of the power modulator; or,
the power supply modulator is provided with a second switch-type power supply regulator, and the second switch-type power supply regulator supplies power to the linear power supply regulator; and the input signal of the second switch type power supply regulator is the reference signal to be tracked.
3. The power modulator of claim 2, further comprising:
the first bias power supply is used for carrying out bias voltage processing on the power supply voltage to be input into the linear power supply regulator and then outputting the power supply voltage to the positive terminal of the linear power supply regulator; and/or;
and the second bias power supply is used for carrying out bias voltage processing on the power supply voltage to be input into the linear power supply regulator and then outputting the power supply voltage to the negative electrode end of the linear power supply regulator.
4. The power modulator of claim 2, further comprising:
and the impedance matching circuit is used for filtering the output voltages of the switch type power supply regulator and the linear power supply regulator and then outputting the filtered output voltages.
5. The power modulator of claim 3, further comprising:
and the impedance matching circuit is used for filtering the output voltages of the switch type power supply regulator and the linear power supply regulator and then outputting the filtered output voltages.
6. The power modulator of claim 2, 3, 4 or 5, further comprising: and the delay circuit is used for compensating the circuit time delay between the switch type power supply regulator and the linear power supply regulator.
7. The power modulator of claim 2, 3, 4 or 5, wherein an output voltage of the linear power regulator forms a closed loop circuit as a feedback signal of the linear power regulator in the power modulator.
8. The power modulator of claim 6, wherein an output voltage of the linear power regulator forms a closed loop circuit as a feedback signal for the linear power regulator in the power modulator.
9. The power modulator of claim 2, 3, 4 or 5, characterized in that in the power modulator, the total output voltage of the power modulator forms a closed loop circuit as a feedback signal of the linear power regulator.
10. The power modulator of claim 6, wherein in the power modulator, a total output voltage of the power modulator forms a closed loop circuit as a feedback signal for the linear power regulator.
11. The power modulator of claim 4 or 5, wherein the impedance matching circuit comprises a low pass filter and a high pass filter;
the low-pass filter is connected with the switch-type power supply regulator and is used for performing low-pass filtering processing on the output voltage of the switch-type power supply regulator;
and the high-pass filter is connected with the linear power supply regulator and is used for carrying out high-pass filtering processing on the output voltage of the linear power supply regulator.
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| CN201010558846.9A CN102478873B (en) | 2010-11-25 | 2010-11-25 | Power supply modulator |
| PCT/CN2011/073022 WO2012068823A1 (en) | 2010-11-25 | 2011-04-19 | Power modulator |
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| CN201010558846.9A CN102478873B (en) | 2010-11-25 | 2010-11-25 | Power supply modulator |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104883139A (en) * | 2015-05-22 | 2015-09-02 | 电子科技大学 | Double-switch power supply modulator for envelope tracking system |
| CN107017765A (en) * | 2017-04-01 | 2017-08-04 | 唯捷创芯(天津)电子技术股份有限公司 | A kind of envelope tracking power supply, chip and communication terminal with series parallel structure |
| CN108107959A (en) * | 2016-11-25 | 2018-06-01 | 三星电子株式会社 | Power supply modulator and the communicator including power supply modulator |
| CN109286374A (en) * | 2017-07-19 | 2019-01-29 | 陕西亚成微电子股份有限公司 | A kind of power supply for envelope-tracking |
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| CN104883139A (en) * | 2015-05-22 | 2015-09-02 | 电子科技大学 | Double-switch power supply modulator for envelope tracking system |
| CN104883139B (en) * | 2015-05-22 | 2018-02-13 | 电子科技大学 | A kind of double switch power modulator for envelope-tracking system |
| CN108107959A (en) * | 2016-11-25 | 2018-06-01 | 三星电子株式会社 | Power supply modulator and the communicator including power supply modulator |
| CN107017765A (en) * | 2017-04-01 | 2017-08-04 | 唯捷创芯(天津)电子技术股份有限公司 | A kind of envelope tracking power supply, chip and communication terminal with series parallel structure |
| CN109286374A (en) * | 2017-07-19 | 2019-01-29 | 陕西亚成微电子股份有限公司 | A kind of power supply for envelope-tracking |
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| CN102478873B (en) | 2014-03-19 |
| WO2012068823A1 (en) | 2012-05-31 |
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