CN1508553A - Open/short circuit detecting apparatus and detecting method thereof - Google Patents
Open/short circuit detecting apparatus and detecting method thereof Download PDFInfo
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- CN1508553A CN1508553A CNA021571317A CN02157131A CN1508553A CN 1508553 A CN1508553 A CN 1508553A CN A021571317 A CNA021571317 A CN A021571317A CN 02157131 A CN02157131 A CN 02157131A CN 1508553 A CN1508553 A CN 1508553A
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Abstract
The invention refers to a kind of open/short circuit testing device and the method, applies to a circuit board, the circuit board includes a pin socket, and the pin socket connects with a chip by electricity, and connects with several terminal resistances. The circuit comprises: a power, one end connects with the chip, the other end connects with a ground line; a detector, which is connected with the first pin the socket to detect the first pint and gets the first current value; a transfer circuit which is connected with the detector to transfer the current into voltage value; a control circuit, which is connected with the transfer circuit, it is used to generate the first control signal according to the first voltage value; and a alarming device which connects with the control circuit and driven by the first control signal, in order to output a alarming signal, thus realizes the aim judging the first pin is open/short circuit or not.
Description
Technical field
The present invention relates to a kind of open circuit/short circuit detector and detection method thereof, refer to especially a kind ofly be applicable to whether circuit between detection chip and the central processing unit or the pin sockets of internal memory has the pick-up unit and the detection method thereof of open circuit/short circuit situation.
Background technology
Progress along with the science and technology epoch, computing machine uses widely in different fields, it mainly is to utilize between chipset on the motherboard and central processing unit (CPU) the normal transmission signal could normal operation, so when the circuit between chipset and central processing unit has open circuit or short circuit condition to take place, will cause computer system to start shooting, and then computer system can not be moved.
Seeing also Fig. 1 (a) reaches (b), the chipset 10 on the early stage motherboard 14 and 11 of the sockets that draw of central processing unit are to utilize circuit to connect, therefore, when desiring the drawing 11 of sockets whether open circuit or short circuit condition generation are arranged of detection chip group 10 and central processing unit, it all is the diode (causing damage through this chipset 10) at pin (pin) two ends that utilize chipset 10 in order to prevent moment excessive electrostatic induced current, shown in Fig. 1 (b), and cooperate the whether conducting of the circuit that draws 11 of sockets 12 of ground wire that avometer measuring diode 14 connect and chipset 10 and central processing unit, judge drawing 11 of sockets which propping up pins and has and open a way or the situation of short circuit of chipset 10 and central processing unit.
See also Fig. 1 (c),, and all terminal resistances are connected in parallel because the design of existing motherboard 15 all is connected to a terminal resistance R (in order to will provide the central processing unit signal pins logic level) with the pin that draws socket 11 of central processing unit.When desiring the drawing 11 of sockets whether open circuit or short circuit condition generation are arranged of detection chip group 10 and central processing unit, because all terminal resistances are connected in parallel, can cause the current value circulation mutually of pin, even if therefore 11 of the sockets that draw of chipset 10 and central processing unit have open circuit or short circuit condition to take place also can't judge, so can't use the described mode of utilizing avometer to measure of Fig. 1 (a), can only utilize the real output signal of every pin of oscilloscope measurement to judge whether open circuit or situation of short circuit by the slip-stick artist.
Use this kind mode to measure whether to have open circuit or situation of short circuit has following shortcoming:
(1) loses time and manpower
Because therefore nearly three, 400 of the pins of central processing unit will be measured all to finish and need expend long time and waste of manpower.
(2) degree of difficulty height
Because the correct output signal of every pin is all inequality,, could judge whether correctly that open circuit or situation of short circuit take place so the slip-stick artist that will measure must understand the state of every pin.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of open circuit/short circuit detector and detection method thereof, can be simple and easy and fast detecting chip and pin sockets between whether the open circuit/short circuit situation is arranged.
A kind of open circuit/short circuit detector provided by the invention, be applicable to a circuit board, comprise a pin sockets on this circuit board, and this pin sockets can be electrically connected with a chip and several terminal resistances are connected, this circuit comprises: a power supply, the one end is connected in this chip, and the other end is electrically connected on a ground wire; One detecting device is electrically connected on first pin of this pin sockets, in order to detecting first pin of this pin sockets, and obtains one first current value; One change-over circuit is electrically connected on this detecting device, in order to convert this first current value to one first magnitude of voltage; One control circuit is electrically connected on this change-over circuit, in order to produce one first control signal according to this first magnitude of voltage; An and attention device, be electrically connected on this control circuit, whether driven by this first control signal, in order to an alarm signal is exported in control that should first control signal, be the purpose of open circuit/short circuit with circuit between first pin that reaches first pin of judging this pin sockets and this chipset.
According to above-mentioned conception, this circuit board can be a motherboard in the open circuit/short circuit detector.
According to above-mentioned conception, this pin sockets can be the pin sockets of a central processing unit in the open circuit/short circuit detector.
According to above-mentioned conception, this pin sockets is connected with several terminal resistances in the open circuit/short circuit detector, in order to provide the central processing unit signal pins logic level.
According to above-mentioned conception, this pin sockets can be the pin sockets of an internal memory in the open circuit/short circuit detector.
According to above-mentioned conception, these several terminal resistances connect in the open circuit/short circuit detector, in order to provide the internal memory signal pins logic level.
According to above-mentioned conception, this power supply can be a dry cell in the open circuit/short circuit detector, and its positive pole is connected in the ground wire of this chip, and negative electricity is connected in the common ground line of this change-over circuit and this control circuit.
According to above-mentioned conception, the ground wire of this chip can be the ground wire of this circuit board in the open circuit/short circuit detector.
According to above-mentioned conception, this detecting device can be a metal probe in the open circuit/short circuit detector.
According to above-mentioned conception, this change-over circuit can be a current-voltage conversion circuit in the open circuit/short circuit detector.
According to above-mentioned conception, this attention device can be a LCD (LCD) in the open circuit/short circuit detector.
According to above-mentioned conception, this attention device can be a seven-segment display in the open circuit/short circuit detector.
According to above-mentioned conception, this attention device can be a hummer in the open circuit/short circuit detector.
According to above-mentioned conception, this attention device can be a light emitting diode (LED) in the open circuit/short circuit detector.
According to above-mentioned conception, this pin sockets can be connected with this pin of chip in the open circuit/short circuit detector, as for each tool one diode of these pin of chip two ends, flows through this chip and causes damage in order to prevent moment excessive electrostatic potential.
The present invention also provides a kind of open circuit/short circuit detector, be applicable to a circuit board, comprise a pin sockets on this circuit board, and this pin sockets is electrically connected with a chip and several terminal resistances are connected, this circuit comprises: a power supply, the one end is connected in this chip, and the other end is electrically connected on a ground wire;
One detecting device is electrically connected on first pin of this pin sockets, in order to detecting first pin of this pin sockets, and obtains one first current value; One change-over circuit is electrically connected on this detecting device, in order to convert this first current value to one first magnitude of voltage; Whether one output circuit is electrically connected on this change-over circuit, in order to according to this first magnitude of voltage and then produce an output signal, be the purpose of open circuit/short circuit with circuit between first pin that reaches first pin of judging this pin sockets and this chipset.
According to above-mentioned conception, this pin sockets can be the pin sockets of a central processing unit in the open circuit/short circuit detector.
According to above-mentioned conception, this pin sockets can be the pin sockets of an internal memory in the open circuit/short circuit detector.
According to above-mentioned conception, this power supply can be a dry cell in the open circuit/short circuit detector, and its positive pole is connected in the ground wire of this chip, and negative electricity is connected in the common ground line of this change-over circuit and this control circuit.
According to above-mentioned conception, the ground wire of this chip can be the ground wire of this circuit board in the open circuit/short circuit detector.
According to above-mentioned conception, this detecting device can be a metal probe in the open circuit/short circuit detector.
According to above-mentioned conception, this change-over circuit can be a current-voltage conversion circuit in the open circuit/short circuit detector.
According to above-mentioned conception, this output circuit can comprise in the open circuit/short circuit detector: a control circuit is electrically connected on this change-over circuit, in order to produce one first control signal according to this first magnitude of voltage; An and attention device, be electrically connected on this control circuit, whether it is driven by this first control signal, in order to an alarm signal is exported in control that should first control signal, be the purpose of open circuit/short circuit with circuit between first pin that reaches first pin of judging this pin sockets and this chipset.
According to above-mentioned conception, this attention device can be a LCD (LCD) in the open circuit/short circuit detector.
According to above-mentioned conception, this attention device can be a seven-segment display in the open circuit/short circuit detector.
According to above-mentioned conception, this attention device can be a hummer in the open circuit/short circuit detector.
According to above-mentioned conception, this attention device can be a light emitting diode (LED) in the open circuit/short circuit detector.
According to above-mentioned conception, this pin sockets is connected with this pin of chip in the open circuit/short circuit detector, as for each tool one diode of these pin of chip two ends, flows through this chip and causes damage in order to prevent moment excessive electrostatic potential.
The present invention provides a kind of open circuit/short circuit detection method again, be applicable to a circuit board, this circuit board comprises a pin sockets, and this pin sockets is electrically connected with a chip and several terminal resistances are connected, and the steps include: to provide a power supply to be electrically connected on this chip and a ground wire; Detect first pin of this pin sockets, and obtain one first current value; Convert this first current value to one first magnitude of voltage; Produce one first control signal according to this first magnitude of voltage; And control that should first control signal exported an alarm signal, whether be the purpose of open circuit/short circuit with circuit between first pin that reaches first pin of judging this pin sockets and this chipset.
According to above-mentioned conception, this circuit board can be a motherboard in the open circuit/short circuit detection method.
According to above-mentioned conception, this pin sockets can be the pin sockets of a central processing unit in the open circuit/short circuit detection method.
According to above-mentioned conception, this pin sockets can be the pin sockets of an internal memory in the open circuit/short circuit detection method.
According to above-mentioned conception, this power supply can be a dry cell in the open circuit/short circuit detection method.
According to above-mentioned conception, in the open circuit/short circuit detection method this first current value system utilize a detecting device contact with first pin of this pin sockets obtain.
According to above-mentioned conception, this first magnitude of voltage can utilize a change-over circuit according to this first current value conversion gained in the open circuit/short circuit detection method.
According to above-mentioned conception, this first control signal can be produced by a control circuit in the open circuit/short circuit detection method.
According to above-mentioned conception, this alarm signal system is produced by an attention device in the open circuit/short circuit detection method.
The present invention provides a kind of open circuit/short circuit detection method again, be applicable to a motherboard, comprise a pin sockets on this motherboard, and this pin sockets is electrically connected with a chip, this internal memory is connected with several terminal resistances, the steps include: to provide a power supply to be electrically connected on this chip and a ground wire; Detect first pin of this pin sockets, and obtain one first current value; Convert this first current value to one first magnitude of voltage; According to this first magnitude of voltage and then produce an output signal, whether be the purpose of open circuit/short circuit with circuit between first pin that reaches first pin of judging this pin sockets and this chipset.
Description of drawings
The present invention utilizes following accompanying drawing and detailed description to be able to more deep understanding:
Fig. 1 (a) (b) (c) is the prior art constructions synoptic diagram;
Fig. 2 (a) is the electrical block diagram of the present invention's first preferred embodiment open circuit/short circuit detector;
Fig. 2 (b) is the electrical block diagram of the present invention's second preferred embodiment open circuit/short circuit detector;
Fig. 3 is the circuit diagram of open circuit/short circuit detector of the present invention;
Fig. 4 is the flow chart of steps of open circuit/short circuit detection method of the present invention.
Wherein, description of reference numerals is as follows:
10: chipset 11: draw socket
12: chipset and the circuit that draws socket
13: the pin 14 of chipset: diode
15: motherboard 20: motherboard
201: chip 2011: pin of chip
2012: diode 202: pin sockets
2021: first pin 203 of pin sockets: terminal resistance
21: open circuit/short circuit detector 211: power supply
212: detecting device 213: current-voltage conversion circuit
214: output circuit 215: control circuit
216: attention device 2131: operational amplifier
2132; Variable resistor 22: row's pin
Embodiment
Seeing also Fig. 2 (a) reaches (b), it is the electrical block diagram of the open circuit/short circuit detector of the present invention's first preferred embodiment and second preferred embodiment, this open circuit/short circuit detector 21 mainly is applicable to a motherboard 20, comprise a pin sockets 202 that is connected with central processing unit or internal memory on this motherboard 20, and this pin sockets 202 can be electrically connected with a chip 201 and several terminal resistances 203 are connected, and this circuit can comprise: a power supply 211, a detecting device 212, a current-voltage conversion circuit 213 and an output circuit 214.This power supply 211 can be a dry cell, its positive pole is connected in the ground wire (being the ground wire of motherboard) of this chip 201 and contacts with the diode 2012 (in order to provide the central processing unit signal pins logic level) of pin 2011 belows of this chip 201, and negative pole then is electrically connected on the common ground line of this current-voltage conversion circuit 213 and this output circuit 214.
This detecting device 212 can be a metal probe, and the row's pin 22 by contact is come out by 2021 backguys of first pin of this pin sockets detects first pin 2021 of this pin sockets, and obtains one first current value I
In
As for this current-voltage conversion circuit 213, be electrically connected at this detecting device 212, can be in order to this first current value I
InConvert one first magnitude of voltage V to.This output circuit 214 can comprise a control circuit 215 and an attention device 216.This control circuit 215 is electrically connected on this current-voltage conversion circuit 213, in order to receive this first magnitude of voltage and to produce one first control signal according to the size of this first magnitude of voltage.
This attention device 216 is electrically connected on this control circuit 215, it is driven by this first control signal, in order to an alarm signal is exported in control that should first control signal, whether be the purpose of open circuit/short circuit with circuit between first pin that reaches first pin of judging this pin sockets and this chipset.In like manner, adopt above-mentioned device that other pin of this pin sockets is detected.
Please consult Fig. 2 (a) again, when originally just having several terminal resistances 203 (in order to logic level of signal pins that this central processing unit or internal memory are provided) that are connected with pin sockets 202 on this motherboard 20, the present invention can directly utilize this several terminal resistances 203.Please consult Fig. 2 (a) again, when on this motherboard 20 during not with several terminal resistances 203 that pin sockets 202 is connected, then need to connect a terminal resistance 203 voluntarily in the signal pins of this pin sockets, and all resistance is connected in parallel, make open circuit/short circuit detector of the present invention advance to detect.By the above embodiments as can be known, open circuit/short circuit detector of the present invention can be applicable to the motherboard that has terminal resistance and do not have terminal resistance simultaneously.
This attention device 216 one of can be in a LCD (LCD), seven-segment display, hummer or the light emitting diode (LED).
See also Fig. 3, it is for the detailed circuit diagram of open circuit/short circuit detector of the present invention.Wherein this current-voltage conversion circuit 213 can comprise an operational amplification circuit 2131 (Operational Amplifier) and a variable resistor 2132.The magnitude of voltage that this operational amplification circuit 2131 can be used to be obtained via this first current value conversion back is amplified and then is obtained this first magnitude of voltage, this follow-up control circuit 215 can be known distinguish, and produce different control signals.
See also Fig. 3 and Fig. 4.Fig. 4 is the flow chart of steps of open circuit/short circuit detection method.It is attention device that light emitting diode (LED) is adopted in this preferred embodiment, and wherein only the pin of bright green light emitting diode representative detection is a normal condition.Only the pin that detects of shiny red light emitting diode representative is short circuit, represents this pin sockets to have pin short circuit more than 2 at least.The pin that detects when both all not luminous representatives is open circuit, has the situation of broken string or chip rosin joint.The main step of this open circuit/short circuit detection method can comprise: at first, the positive pole of 1.5 volts dry cells is connected with the ground wire of chip, negative pole is connected with the common ground line of this current-voltage conversion circuit and this control circuit.Secondly, the pin of metal probe with a normal condition contacted, and adjust the variable resistor that is arranged at this current-voltage conversion circuit, (LED) lights up to green LED, promptly finishes correction work.Then, row's pin that the contact of this metal probe is come out by first pin institute backguy of this pin sockets, and detect and obtain one first current value.Then, utilize a current-voltage conversion circuit to convert this first current value to one first magnitude of voltage.Then, this first magnitude of voltage is sent to a control circuit, makes this control circuit to should first magnitude of voltage and produce one first control signal.At last, utilize this first control signal to drive this light emitting diode, allow the user judge that according to the situation of lumination of light emitting diode circuit is open circuit/short circuit or normal situation between first pin of first pin of this pin sockets and this chip.In like manner, adopt above-mentioned method that other pin of this pin sockets is detected.
See also following table, it is 1.5 volts for the power supply of this open circuit/short circuit detector and connects central processing unit or the terminal resistance of the signal pins of internal memory is when being 56 ohm, according to the testing result that current value obtained that detects.
| Detect the current value (mA) of gained | Magnitude of voltage after the conversion (V) | The light emitting diode that is driven | |
| 20 | About 3V | All do not work | Open circuit |
| 40 | About 4V | Green | Normally |
| 60 | More than the 5V | Red | Short circuit |
When being attention device as for the employing hummer, it mainly is to control that should the different control signals that control circuit produced, send different types of sound or same sound by hummer but be the tone of different frequency, whether the situation of open circuit/short circuit is arranged to reach the circuit of informing this pin sockets of user and chip chamber.
Described above comprehensive, open circuit/short circuit detector of the present invention and detection method thereof, can effectively improve prior art needs to check pin with oscillograph, both very high problems of a waste of time and manpower and degree of difficulty, use device and method of the present invention only need use the probe contact by this pin institute backguy row's pin out, again according to the situation of lumination of light emitting diode, just can be simple and easy and fast detecting chip and pin sockets between whether the open circuit/short circuit situation is arranged, and can be applicable to simultaneously the tool terminal resistance and not have on the motherboard of terminal resistance, and then reach development goal of the invention of the present invention.
Claims (40)
1. an open circuit/short circuit detector is applicable to a circuit board, comprises a pin sockets on this circuit board, and this pin sockets is electrically connected with a chip and several terminal resistances are connected, and this circuit comprises:
One power supply, the one end is connected in this chip, and the other end is electrically connected on a ground wire;
One detecting device is electrically connected on first pin of this pin sockets, in order to detecting first pin of this pin sockets, and obtains one first current value;
One change-over circuit is electrically connected on this detecting device, in order to convert this first current value to one first magnitude of voltage;
One control circuit is electrically connected on this change-over circuit, in order to produce one first control signal according to this first magnitude of voltage; And
One attention device, be electrically connected on this control circuit, whether it is driven by this first control signal, in order to an alarm signal is exported in control that should first control signal, be the purpose of open circuit/short circuit with circuit between first pin that reaches first pin of judging this pin sockets and this chip.
2. open circuit/short circuit detector as claimed in claim 1 is characterized in that, this circuit board is a motherboard.
3. open circuit/short circuit detector as claimed in claim 1 is characterized in that, this pin sockets is the pin sockets of a central processing unit.
4. open circuit/short circuit detector as claimed in claim 3 is characterized in that, these several terminals logic level of signal pins in order to this central processing unit to be provided.
5. open circuit/short circuit detector as claimed in claim 1 is characterized in that, this pin sockets is the pin sockets of an internal memory.
6. open circuit/short circuit detector as claimed in claim 5 is characterized in that, these several terminal resistances logic level of signal pins in order to this internal memory to be provided.
7. open circuit/short circuit detector as claimed in claim 1 is characterized in that, this power supply is a dry cell, and its positive pole is connected in the ground wire of this chip, and negative electricity is connected in the common ground line of this change-over circuit and this control circuit.
8. open circuit/short circuit detector as claimed in claim 7 is characterized in that, the ground wire of this chip is the ground wire of this circuit board.
9. open circuit/short circuit detector as claimed in claim 1 is characterized in that, this detecting device is a metal probe.
10. open circuit/short circuit detector as claimed in claim 1 is characterized in that, this change-over circuit is a current-voltage conversion circuit.
11. open circuit/short circuit detector as claimed in claim 10 is characterized in that, this current-voltage conversion circuit comprises-variable resistor, before first pin to this pin sockets detects, carries out a correction work.
12. open circuit/short circuit detector as claimed in claim 1 is characterized in that, this attention device is a LCD (LCD).
13. open circuit/short circuit detector as claimed in claim 1 is characterized in that, this attention device is a seven-segment display.
14. open circuit/short circuit detector as claimed in claim 1 is characterized in that, this attention device is a hummer.
15. open circuit/short circuit detector as claimed in claim 1 is characterized in that, this attention device is a light emitting diode (LED).
16. open circuit/short circuit detector as claimed in claim 1 is characterized in that, this pin sockets is connected with this pin of chip, as for each tool one diode of these pin of chip two ends, flows through this chip and causes damage in order to prevent moment excessive electrostatic potential.
17. an open circuit/short circuit detector is applicable to a circuit board, comprises a pin sockets on this circuit board, and this pin sockets is electrically connected with a chip and several terminal resistances are connected, this circuit comprises:
One power supply, the one end is connected in this chip, and the other end is electrically connected on a ground wire;
One detecting device is electrically connected on first pin of this pin sockets, in order to detecting first pin of this pin sockets, and obtains one first current value;
One change-over circuit is electrically connected on this detecting device, in order to convert this first current value to one first magnitude of voltage;
Whether one output circuit is electrically connected on this change-over circuit, in order to according to this first magnitude of voltage and then produce an output signal, be the purpose of open circuit/short circuit with circuit between first pin that reaches first pin of judging this pin sockets and this chip.
18. open circuit/short circuit detector as claimed in claim 17 is characterized in that, this pin sockets is the pin sockets of a central processing unit.
19., it is characterized in that this pin sockets is the pin sockets of an internal memory as claim 17 described open circuit/short circuit detectors.
20. open circuit/short circuit detector as claimed in claim 17 is characterized in that, this power supply is a dry cell, and its positive pole is connected in the ground wire of this chip, and negative electricity is connected in the common ground line of this change-over circuit and this control circuit.
21. open circuit/short circuit detector as claimed in claim 20 is characterized in that, the ground wire of this chip is the ground wire of this circuit board.
22. open circuit/short circuit detector as claimed in claim 17 is characterized in that, this detecting device is a metal probe.
23. open circuit/short circuit detector as claimed in claim 17 is characterized in that, this change-over circuit is a current-voltage conversion circuit.
24. open circuit/short circuit detector as claimed in claim 17 is characterized in that, this output circuit comprises:
One control circuit is electrically connected on this change-over circuit, in order to produce one first control signal according to this first magnitude of voltage; And
One attention device, be electrically connected on this control circuit, whether it is driven by this first control signal, in order to an alarm signal is exported in control that should first control signal, be the purpose of open circuit/short circuit with circuit between first pin that reaches first pin of judging this pin sockets and this chipset.
25. open circuit/short circuit detector as claimed in claim 24 is characterized in that, this attention device is a LCD (LCD).
26. open circuit/short circuit detector as claimed in claim 24 is characterized in that, this attention device is a seven-segment display.
27. open circuit/short circuit detector as claimed in claim 24 is characterized in that, this attention device is a hummer.
28. open circuit/short circuit detector as claimed in claim 24 is characterized in that, this attention device is a light emitting diode (LED).
29. open circuit/short circuit detector as claimed in claim 17 is characterized in that, this pin sockets is connected with this pin of chip, as for each tool one diode of these pin of chip two ends, flows through this chip and causes damage in order to prevent moment excessive electrostatic potential.
30. an open circuit/short circuit detection method is applicable to a circuit board, comprises a pin sockets on this circuit board, and this pin sockets is electrically connected with a chip and several terminal resistances are connected, and the steps include:
Provide a power supply to be electrically connected on this chip and a ground wire;
Detect first pin of this pin sockets, and obtain one first current value;
Convert this first current value to one first magnitude of voltage;
Produce one first control signal according to this first magnitude of voltage; And
Whether an alarm signal is exported in control that should first control signal, be the purpose of open circuit/short circuit with circuit between first pin that reaches first pin of judging this pin sockets and this chip.
31. open circuit/short circuit detection method as claimed in claim 30 is characterized in that, first pin that detects this pin sockets also comprises the following steps: before
Adjust a variable resistor to carry out a correction work;
32. open circuit/short circuit detection method as claimed in claim 30 is characterized in that, this circuit board is a motherboard.
33. open circuit/short circuit detection method as claimed in claim 30 is characterized in that, this pin sockets is the pin sockets of a central processing unit, and this pin sockets is connected with several terminal resistances.
34. open circuit/short circuit detection method as claimed in claim 30 is characterized in that, this pin sockets is the pin sockets of an internal memory, and this pin sockets is connected with several terminal resistances.
35. open circuit/short circuit detection method as claimed in claim 30 is characterized in that, this power supply is a dry cell.
36. open circuit/short circuit detection method as claimed in claim 30 is characterized in that, this first current value utilize a detecting device contact with first pin of this pin sockets obtain.
37. open circuit/short circuit detection method as claimed in claim 30 is characterized in that, this first magnitude of voltage utilizes a change-over circuit according to this first current value conversion gained.
38. open circuit/short circuit detection method as claimed in claim 30 is characterized in that, this first control signal is produced by a control circuit.
39. open circuit/short circuit detection method as claimed in claim 30 is characterized in that this alarm signal is produced by an attention device.
40. an open circuit/short circuit detection method is applicable to a motherboard, comprises a pin sockets on this motherboard, and this pin sockets is electrically connected with a chip and several terminal resistances are connected, and the steps include:
Provide a power supply to be electrically connected on this chip and a ground wire;
Detect first pin of this pin sockets, and obtain one first current value;
Convert this first current value to one first magnitude of voltage;
According to this first magnitude of voltage and then produce an output signal, whether be the purpose of open circuit/short circuit with circuit between first pin that reaches first pin of judging this pin sockets and this chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021571317A CN1508553A (en) | 2002-12-17 | 2002-12-17 | Open/short circuit detecting apparatus and detecting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021571317A CN1508553A (en) | 2002-12-17 | 2002-12-17 | Open/short circuit detecting apparatus and detecting method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN1508553A true CN1508553A (en) | 2004-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021571317A Pending CN1508553A (en) | 2002-12-17 | 2002-12-17 | Open/short circuit detecting apparatus and detecting method thereof |
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2002
- 2002-12-17 CN CNA021571317A patent/CN1508553A/en active Pending
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| CN106313902A (en) * | 2013-05-22 | 2017-01-11 | 珠海艾派克微电子有限公司 | Ink cartridge chip short-circuit detection method, chip and ink cartridge |
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