CN106300319B - A kind of integrated circuit anti-plug detection protective device - Google Patents
A kind of integrated circuit anti-plug detection protective device Download PDFInfo
- Publication number
- CN106300319B CN106300319B CN201610643553.8A CN201610643553A CN106300319B CN 106300319 B CN106300319 B CN 106300319B CN 201610643553 A CN201610643553 A CN 201610643553A CN 106300319 B CN106300319 B CN 106300319B
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- Prior art keywords
- circuit
- comparator
- integrated circuit
- driving circuit
- switch driving
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
- H02H11/003—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection using a field effect transistor as protecting element in one of the supply lines
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/70—Testing of connections between components and printed circuit boards
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention discloses a kind of integrated circuit anti-plug detection protective device, including voltage sampling circuit, comparator, reference voltage circuit and three switch driving circuits；Voltage sampling circuit acquires the voltage of resistance between two pins；The in-phase input end of the control source comparator of acquisition, the output end of reference voltage circuit is connected with the inverting input of comparator, the output end of comparator is connected with three switch driving circuits respectively, each switch driving circuit respectively drives anti-plug instruction warning circuit, the correct indicating circuit of grafting and relay, passes through the break-make of contact control the test power supply and ic power interface of relay；Integrated circuit is in correct grafting and anti-plug, voltage sampling circuit can obtain different voltage, comparator is set to export high level and low level respectively in the correct grafting of integrated circuit and anti-plug using different voltage, different switch driving circuits is driven again, the judgement and prompt for realizing anti-plug are alarmed, and ensure the test safety of integrated circuit.
Description
Technical field
The present invention relates to integrated circuit detection technique field, specifically a kind of integrated circuit anti-plug detects protective device.
Background technology
When testing integrated circuit, sometimes because accidentally to will appear circuit anti-by 1 footnote will unobvious or operator
Direction rotates the case where 180 degree is inserted into test fixture, at this time if be powered, can usually cause integrated circuit permanent damages
Serious consequence.
Integrated circuit caused by anti-plug when test how is avoided to damage problem, there is presently no technical guarantee measures, still need to
The appearance of anti-plug situation is reduced by test operator is careful.
Invention content
The purpose of the present invention is to provide a kind of integrated circuit anti-plugs to detect protective device, which can judge to integrate
Circuit test when whether anti-plug, and confirm integrated circuit grafting it is correct after be just powered, ensure the test of integrated circuit
Safety.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of integrated circuit anti-plug detects protective device, including voltage sampling circuit, comparator, reference voltage circuit, the
One switch driving circuit, second switch driving circuit and third switch time delay driving circuit；Voltage sampling circuit is used for and integrates
Two pins of circuit are connected, and acquire the voltage of resistance between two pins；The homophase input of the control source comparator of acquisition
End, the output end of reference voltage circuit is connected with the inverting input of comparator, the output end of comparator respectively with first switch
Driving circuit, second switch driving circuit and third switch time delay driving circuit are connected, and first switch driving circuit is low electricity
Flat conducting, high level cut-off, second switch driving circuit and third switch time delay driving circuit be high level be connected, low level
Cut-off；The output end of first switch driving circuit is connected with anti-plug instruction warning circuit, the output end of second switch driving circuit
It is connected with the correct indicating circuit of grafting, the output end of third switch time delay driving circuit is connected with the first relay, passes through first
The break-make of contact control the test power supply and ic power interface of relay.
Further, described device further includes the second relay, and the second relay is driven by second switch driving circuit
It is dynamic, the break-make of voltage sampling circuit and two pins of integrated circuit is realized by the contact of the second relay；Described device is also wrapped
Latching circuit is included, latching circuit protects the output end of comparator in voltage sampling circuit and two pin break-makes of integrated circuit
It holds in high level.
The beneficial effects of the invention are as follows：Resistance when integrated circuit anti-plug between two pins is more than and integrated circuit
Resistance between other two symmetrical pin of central point, to make integrated circuit in correct grafting and anti-plug, electricity
Pressure sample circuit can obtain different voltage, make comparator in the correct grafting of integrated circuit and anti-plug time-division using different voltage
Not Shu Chu high level and low level, drive different switch driving circuits using high level and low level, realize to integrated circuit
Whether the judgement of anti-plug is alarmed with prompt；And so that test power supply is disconnected in anti-plug with integrated circuit by relay, in grafting
It is powered when correct, ensures the test safety of integrated circuit.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples：
Fig. 1 is the electrical principle block diagram of the present invention；
Fig. 2 is the electrical schematic diagram of the present invention.
Specific implementation mode
As shown in Figure 1, the present invention provides a kind of integrated circuit anti-plug detection protective device, including voltage sampling circuit 1, ratio
Compared with device N1, reference voltage circuit 2, first switch driving circuit 3, second switch driving circuit 4 and third switch time delay driving electricity
Road 5；Voltage sampling circuit 1 is used to be connected with two pins for integrating circuit U 1, acquires the voltage of resistance between two pins；It adopts
The in-phase input end of the control source comparator N1 of collection, the inverting input of the output end and comparator N1 of reference voltage circuit 2
It is connected, the output end of comparator N1 prolongs with first switch driving circuit 3, second switch driving circuit 4 and third switch respectively
When driving circuit 5 be connected, first switch driving circuit 3 be low level conducting, high level cut-off, second switch driving circuit 4 with
Third switch time delay driving circuit 5 is high level conducting, low level cut-off；The output end of first switch driving circuit 3 connects
There is anti-plug to indicate that warning circuit 6, the output end of second switch driving circuit 4 are connected with the correct indicating circuit 7 of grafting, third switch
The output end of delay driving circuit 5 is connected with the first relay K1, by the contact of the first relay K1 control test power supply with
The break-make of ic power interface；Described device further includes the second relay K2, and the second relay K2 is driven by second switch
Circuit 4 is driven, and the contact realization voltage sampling circuit 1 of the second relay K2 and leading to for two pins of integrated circuit U1 are passed through
It is disconnected；Described device further includes latching circuit 8, and latching circuit 8 is in voltage sampling circuit 1 and two pin break-makes of integrated circuit U1
When, the output end of comparator N1 is maintained at high level.
The operation principle of the present invention is illustrated with reference to Fig. 2, one end of resistance R1 connects power supply VCC1, and the other end connects
It is grounded as the interface for connecting integrated circuit U1, one end of resistance R2 after connecing the normally-closed contact of the second relay K2, the other end point
Not Lian Jie comparator N1 in-phase input end and the second relay K2 another normally-closed contact, and as connection integrated circuit U1
Another interface；Reference voltage circuit 2 includes reference voltage chip N2, and the ends IN of reference voltage chip N2 connect power supply
The end VCC2, GND is grounded, and adjustable resistance R12 is connected between the ends GND and the ends ADJ, adjustable electric is connected between OUT terminal and the ends ADJ
R13 is hindered, OUT terminal is connected to the inverting input of comparator N1；First switch driving circuit 3 includes triode V4, triode V4
Base stage by the output end of resistance R4 connection comparators N1, the emitter of triode V4 connects power supply VCC3, the two of resistance R5
End is connected with the emitter of triode V4 and base stage respectively；Anti-plug indicates that warning circuit 6 includes light emitting diode V2 and buzzer
The collector of the anode connecting triode V4 of BUZ, light emitting diode V2, the cathode of light emitting diode V2 are grounded by resistance R6,
The collector of the positive connecting triode V4 of buzzer BUZ, the cathode of buzzer BUZ are grounded by resistance R7；Second switch drives
Dynamic circuit 4 includes triode V5, and the base stage of triode V5 is separately connected resistance R8 and resistance R9, and the other end of resistance R8 is compared with
The output end of device N1 is connected, the other end ground connection of resistance R9, the emitter ground connection of triode V5；The correct indicating circuit 7 of grafting wraps
The anode of V3 containing light emitting diode, light emitting diode V3 connect power supply VCC4, and the cathode of light emitting diode V3 is connected by resistance R11
Connect the collector of triode V5；Third switch time delay driving circuit 5 includes triode V6, and the base stage of triode V6 is separately connected electricity
The other end of resistance R14, R15 and capacitance C1, resistance R14 are connected with the output end of comparator N1, and resistance R15 is another with capacitance C1's
End is grounded, the emitter ground connection of triode V6, the coil of the collector series resistance R16 and relay K1 of triode V6, after
The other end connection power supply VCC2 of electric appliance K1 coils；Power supply of a pair of of the normally opened contact of relay K1 as connection integrated circuit U1
A pair of of common end of interface, relay K1 is separately connected power supply VCC and VSS；Latching circuit 8 includes concatenated resistance R3 and two poles
The anode of pipe V1, diode V1 are connected with the output end of comparator N1, the in-phase input end of one end and comparator N1 of resistance R3
It is connected.
When in use, two pins m, n for selecting integrated circuit U 1, the resistance between them are Ri1, and m, n are about integrated
Other two symmetrical pin of 1 central point of circuit U is p, q, and the resistance between p, q is Ri2, makes Ri1 ＜ Ri2；If encountering
Resistance between two selected pins and the electricity between other two pin of IC Center's point symmetry distribution
When hindering equal or very close, because there are many pin of integrated circuit, the electricity between pin can be made by choosing other pins completely
Resistance meets Ri1 ＜ Ri2, and the two resistance value size has obvious difference.Pin m, n are not limited in the same of integrated circuit
Side can arbitrarily be chosen, and to the integrated circuit of single-row lead, same method can be used and choose.
When integrated circuit U1 anti-plugs are when on test fixture, a pair of of normally-closed contact of relay K2 respectively with integrated circuit U1
P, q pin be connected, R1, Ri2 and R2 are connected into circuit, due to Ri2>Ri1, the at this time voltage of comparator N1 in-phase input ends
It is smaller when Vf is correctly inserted relative to integrated circuit, by adjusting adjustable resistance R12 and R13, reference voltage chip N2 is made to export
Reference voltage V ref>Vf, comparator N1 export low level, and triode V4 conductings, light emitting diode V2 shines, while buzzer
BUZ pipes, and reminds integrated circuit U1 anti-plugs；At the same time, since comparator N1 outputs are low level, triode V5 ends,
Light emitting diode V3 does not shine, and relay K2 must not be electric, still maintains original state；Triode V6 cut-offs, relay K1 must not
Electricity, normally opened contact are not attracted, and power supply VCC, VSS do not give integrated circuit U1 power supplies.
When integrated circuit correctly inserts on test fixture, a pair of of normally-closed contact of relay K2 respectively with integrated circuit U1
M, n pin be connected, R1, Ri1 and R2 are connected into circuit, due to Ri1 ＜ Ri2, the voltage of comparator N1 in-phase input ends at this time
Larger when Vt is relative to integrated circuit anti-plug, Vref ＜ Vt, comparator N1 export high level, triode V4 cut-offs, light-emitting diodes
Pipe V2 does not shine, and buzzer BUZ does not also pipe；At the same time, since comparator N1 outputs are high level, triode V5 is connected,
Light emitting diode V3 hairs shine, and prompt integrated circuit grafting correct；Relay K2 obtains electric, the normally-closed contact disconnection of relay K2,
Normally opened contact is closed, and so that m, n pin of integrated circuit U1 is disconnected from present apparatus interface, is prevented the present apparatus to integrated circuit testing
It influences；Since comparator N1 output is high level, the time-lag action of capacitance C1, triode V6 is led relative to triode V5 delays
Logical, relay K1 obtains electric, and the normally opened contact of relay K1 is closed, normally-closed contact disconnects, and makes power supply VCC and VSS to integrated circuit
U1 powers.Triode V6 is relative to triode V5 Delayed conductings, it can be ensured that sample circuit has been when to integrated circuit U1 power-up
It is disconnected with integrated circuit, to prevent sample circuit from being impacted to integrated circuit testing.Comparator N1 output high level makes two poles
Pipe V1 conductings, the in-phase input end of comparator N1 are maintained at high level, so that the output end of comparator N1 is maintained high level, play
The purpose of self-locking makes the voltage sampling circuit of the present apparatus after being disconnected with integrated circuit, and comparator N1 output ends can still tieed up
It holds in high level.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form；Appoint
What those skilled in the art, without departing from the scope of the technical proposal of the invention, all using the side of the disclosure above
Method and technology contents make many possible changes and modifications to technical solution of the present invention, or are revised as the equivalent reality of equivalent variations
Apply example.Therefore, every content without departing from technical solution of the present invention, according to the technical essence of the invention does above example
Any simple modification, equivalent replacement, equivalence changes and modification, still fall within technical solution of the present invention protection in the range of.
Claims (2)
1. a kind of integrated circuit anti-plug detects protective device, which is characterized in that including voltage sampling circuit, comparator, benchmark electricity
Volt circuit, first switch driving circuit, second switch driving circuit and third switch time delay driving circuit；Voltage sampling circuit is used
It is connected in two pins with integrated circuit, acquires the voltage of resistance between two pins；The control source comparator of acquisition
In-phase input end, the output end of reference voltage circuit are connected with the inverting input of comparator, the output end of comparator respectively with
First switch driving circuit, second switch driving circuit and third switch time delay driving circuit are connected, first switch driving electricity
Road is low level conducting, high level cut-off, and second switch driving circuit is that high level is led with third switch time delay driving circuit
Logical, low level cut-off；The output end of first switch driving circuit is connected with anti-plug instruction warning circuit, second switch driving circuit
Output end be connected with the correct indicating circuit of grafting, the output end of third switch time delay driving circuit is connected with the first relay,
Pass through the break-make of contact control the test power supply and ic power pin of the first relay.
2. a kind of integrated circuit anti-plug according to claim 1 detects protective device, which is characterized in that described device is also wrapped
The second relay is included, the second relay is driven by second switch driving circuit, and electricity is realized by the contact of the second relay
Press the break-make of sample circuit and two pins of integrated circuit；Described device further includes latching circuit, and latching circuit is in voltage sample
After two pins of circuit and integrated circuit disconnect, the output end of comparator is made to maintain high level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610643553.8A CN106300319B (en) | 2016-08-08 | 2016-08-08 | A kind of integrated circuit anti-plug detection protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610643553.8A CN106300319B (en) | 2016-08-08 | 2016-08-08 | A kind of integrated circuit anti-plug detection protective device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106300319A CN106300319A (en) | 2017-01-04 |
| CN106300319B true CN106300319B (en) | 2018-08-17 |
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| CN201610643553.8A Active CN106300319B (en) | 2016-08-08 | 2016-08-08 | A kind of integrated circuit anti-plug detection protective device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107256058A (en) * | 2017-08-04 | 2017-10-17 | 温岭阿凡达机电有限公司 | A kind of transformer switching circuit and switching method |
| CN107884604B (en) * | 2017-12-14 | 2024-04-05 | 池州职业技术学院 | Photoelectric switch on-off level detection circuit |
| CN109813998A (en) * | 2019-01-14 | 2019-05-28 | 珠海格力电器股份有限公司 | A kind of digital equipment interface humidity detection circuit and terminal |
| CN114838635B (en) * | 2022-05-23 | 2023-06-27 | 华东光电集成器件研究所 | Overcurrent short-circuit protection circuit and control method for detonation control interface of digital detonator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191821A (en) * | 2006-11-23 | 2008-06-04 | 苏州宇达电通有限公司 | Battery parameter ,temperature pin automatic recognition system and its process |
| CN103444258A (en) * | 2011-03-21 | 2013-12-11 | 三星电子株式会社 | Mobile terminal and interface method thereof |
| CN103472347A (en) * | 2012-06-08 | 2013-12-25 | 富泰华工业（深圳）有限公司 | Auxiliary testing circuit, chip with auxiliary testing circuit and circuit board with auxiliary testing circuit |
-
2016
- 2016-08-08 CN CN201610643553.8A patent/CN106300319B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191821A (en) * | 2006-11-23 | 2008-06-04 | 苏州宇达电通有限公司 | Battery parameter ,temperature pin automatic recognition system and its process |
| CN103444258A (en) * | 2011-03-21 | 2013-12-11 | 三星电子株式会社 | Mobile terminal and interface method thereof |
| CN103472347A (en) * | 2012-06-08 | 2013-12-25 | 富泰华工业（深圳）有限公司 | Auxiliary testing circuit, chip with auxiliary testing circuit and circuit board with auxiliary testing circuit |
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| CN106300319A (en) | 2017-01-04 |
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