CN203491976U - Filter and amplification circuit for human body electronic scale - Google Patents
Filter and amplification circuit for human body electronic scale Download PDFInfo
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- CN203491976U CN203491976U CN201320652986.1U CN201320652986U CN203491976U CN 203491976 U CN203491976 U CN 203491976U CN 201320652986 U CN201320652986 U CN 201320652986U CN 203491976 U CN203491976 U CN 203491976U
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- resistance
- operational amplifier
- integrated operational
- resistor
- electric capacity
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Abstract
The utility model discloses a filter and amplification circuit for a human body electronic scale. The filter and amplification circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a first capacitor, a second capacitor, a third capacitor, a first integrated operational amplifier, a second integrated operational amplifier and a third integrated operational amplifier, wherein the positive voltage input end of a power supply is connected with the positive power end of the second integrated operational amplifier, the positive power end of the first integrated operational amplifier and the positive power end of the third integrated operational amplifier respectively; the negative voltage input end of the power supply is connected with the negative power end of the first integrated operational amplifier, the negative power end of the second integrated operational amplifier and the negative power end of the third integrated operational amplifier respectively. The utility model discloses a filter and amplification circuit for a human body electronic scale, wherein the circuit is used for filtering a signal by a low-pass filter and has the characteristic of being anti-interference; moreover, the three integrated operational amplifiers are used, so that the circuit can achieve the requirements of stabilized amplification factor, low noise and low drift; the filter and amplification circuit has popularization and use values.
Description
Technical field
The utility model relates to a kind of filter amplification circuit, relates in particular to a kind of filter amplification circuit claiming for body electronic.
Background technology
During human electronic weigher weighing, via the weight sensor being contained in mechanism, gravity is converted to the analog signal of voltage or electric current, after amplification and filtering processing, by A/D processor, be converted to digital signal, digital signal is by central processing unit calculation process, and periphery need function and various interface circuit be also connected application with CPU, finally by display screen, with digital form, shown.Body electronic claims to be all provided with amplifying circuit, for amplifying the small-signal of weight sensor output, to reach follow-up conversion requirement.Traditional amplifier claiming for body electronic is easily disturbed, and amplifying circuit can not reach the requirement of stable multiplication factor, low noise and low drift.
Utility model content
The purpose of this utility model provides a kind of filter amplification circuit claiming for body electronic with regard to being in order to address the above problem.
In order to achieve the above object, the utility model has adopted following technical scheme:
A kind of filter amplification circuit claiming for body electronic, comprise the first resistance to the 11 resistance, the first electric capacity to the three electric capacity and the first integrated operational amplifier to the three integrated operational amplifiers, the cathode voltage input of power supply respectively with the cathode power supply end of described the second integrated operational amplifier, the cathode power supply end of described the first integrated operational amplifier is connected with the cathode power supply end of described the 3rd integrator, the cathode voltage input of power supply respectively with the negative electricity source of described the first integrated operational amplifier, the negative electricity source of described the second integrated operational amplifier is connected with the negative electricity source of described the 3rd integrated operational amplifier, first signal input is connected with the first end of described the first resistance, the second end of described the first resistance is connected with the first end of described the 7th resistance with the first end of described the first electric capacity respectively, the second end ground connection of described the first electric capacity, the input in the same way of described the second integrated operational amplifier is connected with the second end of described the 7th resistance, the inverting input of described the second integrated operational amplifier respectively with the first end of described the 8th resistance, the first end of described the 3rd resistance, the first end of described the 5th resistance is connected with the first end of described the tenth resistance, the output of described the second integrated operational amplifier is connected with the first end of described the 9th resistance, the second end of described the 8th resistance is connected with the inverting input of described the first integrated operational amplifier with the first end of the 4th resistance described in the second end of described the 3rd resistance respectively, the second end of described the 9th resistance respectively with the second end of described the tenth resistance, the inverting input of described the 3rd integrated operational amplifier, the output of described the 3rd integrated operational amplifier is connected with the first end of described the 11 resistance, the second end of described the 11 resistance is connected with the first end of described the 3rd electric capacity, the second end ground connection of described the 3rd electric capacity, the in-phase input end of described the 3rd integrated operational amplifier is connected with the first end of described the 6th resistance with the second end of described the 4th resistance respectively, the second end of described the 5th resistance is connected with the output of described the first integrated operational amplifier with the second end of described the 6th resistance respectively, secondary signal input is connected with the first end of described the second resistance, the second end of described the second resistance is connected with the in-phase input end of described the first integrated operational amplifier with the first end of described the second electric capacity respectively, the second end ground connection of described the second electric capacity.
The beneficial effects of the utility model are:
The utility model is a kind of filter amplification circuit claiming for body electronic, this circuit adopts low pass filter to carry out filtering to signal, there is jamming-proof feature, and adopt three integrated operational amplifiers, make circuit can reach the requirement of stable multiplication factor, low noise and low drift, there is popularizing value.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of filter amplification circuit claiming for body electronic of the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, a kind of filter amplification circuit claiming for body electronic of the utility model, comprise the first resistance R 1 to the 11 resistance R 11, the first capacitor C 1 is to the 3rd capacitor C 3 and the first integrated operational amplifier IC1 to the three integrated operational amplifier IC3, the cathode voltage input of power supply respectively with the cathode power supply end of the second integrated operational amplifier IC2, the cathode power supply end of the first integrated operational amplifier IC1 is connected with the cathode power supply end of the 3rd integrator IC3, the cathode voltage input of power supply respectively with the negative electricity source of the first integrated operational amplifier IC1, the negative electricity source of the second integrated operational amplifier IC2 is connected with the negative electricity source of the 3rd integrated operational amplifier IC3, first signal input is connected with the first end of the first resistance R 1, the second end of the first resistance R 1 is connected with the R7 first end of the 7th resistance with the first end of the first capacitor C 1 respectively, the second end ground connection of the first capacitor C 1, the input in the same way of the second integrated operational amplifier IC2 is connected with the second end of the 7th resistance R 7, the inverting input of the second integrated operational amplifier IC2 respectively with the first end of the 8th resistance R 8, the first end of the 3rd resistance R 3, the first end of the 5th resistance R 5 is connected with the first end of the tenth resistance R 10, the output of the second integrated operational amplifier IC2 is connected with the first end of the 9th resistance R 9, the second end of the 8th resistance R 8 is connected with the inverting input of the first integrated operational amplifier IC1 with the first end of the second end the 4th resistance R 4 of the 3rd resistance R 3 respectively, the second end of the 9th resistance R 9 respectively with the second end of the tenth resistance R 10, the inverting input of the 3rd integrated operational amplifier IC3, the output of the 3rd integrated operational amplifier IC3 is connected with the first end of the 11 resistance R 11, the second end of the 11 resistance R 11 is connected with the first end of the 3rd capacitor C 3, the second end ground connection of the 3rd capacitor C 3, the in-phase input end of the 3rd integrated operational amplifier IC3 is connected with the first end of the 6th resistance R 6 with the second end of the 4th resistance R 4 respectively, the second end of the 5th resistance R 5 is connected with the output of the first integrated operational amplifier IC1 with the second end of the 6th resistance R 6 respectively, secondary signal input is connected with the first end of the second resistance R 2, the second end of the second resistance R 2 is connected with the in-phase input end of the first integrated operational amplifier IC1 with the first end of the second capacitor C 2 respectively, the second end ground connection of the second capacitor C 2.
Claims (1)
1. the filter amplification circuit claiming for body electronic, it is characterized in that: comprise the first resistance to the 11 resistance, the first electric capacity to the three electric capacity and the first integrated operational amplifier to the three integrated operational amplifiers, the cathode voltage input of power supply respectively with the cathode power supply end of described the second integrated operational amplifier, the cathode power supply end of described the first integrated operational amplifier is connected with the cathode power supply end of described the 3rd integrator, the cathode voltage input of power supply respectively with the negative electricity source of described the first integrated operational amplifier, the negative electricity source of described the second integrated operational amplifier is connected with the negative electricity source of described the 3rd integrated operational amplifier, first signal input is connected with the first end of described the first resistance, the second end of described the first resistance is connected with the first end of described the 7th resistance with the first end of described the first electric capacity respectively, the second end ground connection of described the first electric capacity, the input in the same way of described the second integrated operational amplifier is connected with the second end of described the 7th resistance, the inverting input of described the second integrated operational amplifier respectively with the first end of described the 8th resistance, the first end of described the 3rd resistance, the first end of described the 5th resistance is connected with the first end of described the tenth resistance, the output of described the second integrated operational amplifier is connected with the first end of described the 9th resistance, the second end of described the 8th resistance is connected with the inverting input of described the first integrated operational amplifier with the first end of the 4th resistance described in the second end of described the 3rd resistance respectively, the second end of described the 9th resistance respectively with the second end of described the tenth resistance, the inverting input of described the 3rd integrated operational amplifier, the output of described the 3rd integrated operational amplifier is connected with the first end of described the 11 resistance, the second end of described the 11 resistance is connected with the first end of described the 3rd electric capacity, the second end ground connection of described the 3rd electric capacity, the in-phase input end of described the 3rd integrated operational amplifier is connected with the first end of described the 6th resistance with the second end of described the 4th resistance respectively, the second end of described the 5th resistance is connected with the output of described the first integrated operational amplifier with the second end of described the 6th resistance respectively, secondary signal input is connected with the first end of described the second resistance, the second end of described the second resistance is connected with the in-phase input end of described the first integrated operational amplifier with the first end of described the second electric capacity respectively, the second end ground connection of described the second electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320652986.1U CN203491976U (en) | 2013-10-22 | 2013-10-22 | Filter and amplification circuit for human body electronic scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320652986.1U CN203491976U (en) | 2013-10-22 | 2013-10-22 | Filter and amplification circuit for human body electronic scale |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203491976U true CN203491976U (en) | 2014-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320652986.1U Expired - Fee Related CN203491976U (en) | 2013-10-22 | 2013-10-22 | Filter and amplification circuit for human body electronic scale |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203491976U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353816A (en) * | 2014-08-20 | 2016-02-24 | 联想(北京)有限公司 | Method for stabilizing power supply, power supply and electronic device |
| CN112880787A (en) * | 2021-01-08 | 2021-06-01 | 重庆开谨科技有限公司 | Waveform processing method for vehicle weighing sensor |
-
2013
- 2013-10-22 CN CN201320652986.1U patent/CN203491976U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353816A (en) * | 2014-08-20 | 2016-02-24 | 联想(北京)有限公司 | Method for stabilizing power supply, power supply and electronic device |
| CN112880787A (en) * | 2021-01-08 | 2021-06-01 | 重庆开谨科技有限公司 | Waveform processing method for vehicle weighing sensor |
| CN112880787B (en) * | 2021-01-08 | 2023-03-31 | 重庆开谨科技有限公司 | Waveform processing method for vehicle weighing sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140319 Termination date: 20141022 |
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| EXPY | Termination of patent right or utility model |