CN106300319A - A kind of integrated circuit anti-plug detection protection device - Google Patents
A kind of integrated circuit anti-plug detection protection device Download PDFInfo
- Publication number
- CN106300319A CN106300319A CN201610643553.8A CN201610643553A CN106300319A CN 106300319 A CN106300319 A CN 106300319A CN 201610643553 A CN201610643553 A CN 201610643553A CN 106300319 A CN106300319 A CN 106300319A
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- Prior art keywords
- circuit
- comparator
- integrated circuit
- voltage
- switch
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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 open a kind of integrated circuit anti-plug detection protection device of the present invention, including voltage sampling circuit, comparator, reference voltage circuit and three switch driving circuits；Voltage sampling circuit gathers the voltage of resistance between two pins；The in-phase input end of the voltage input comparator gathered, the outfan of reference voltage circuit is connected with the inverting input of comparator, the outfan of comparator is connected with three switch driving circuits respectively, each switch driving circuit drives anti-plug instruction warning circuit, the correct indicating circuit of grafting and relay respectively, is controlled the break-make of test power supply and ic power interface by the contact of relay；Integrated circuit is when correct grafting is with anti-plug, voltage sampling circuit can obtain different voltage, different voltage is utilized to make comparator export high level and low level respectively when the correct grafting of integrated circuit is with anti-plug, drive different switch driving circuits again, the judgement realizing anti-plug is reported to the police with prompting, it is ensured that 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 detection protection device.
Background technology
When integrated circuit is tested, sometimes because of 1 footnote will is inconspicuous or operator's imprudence to there will be circuit anti-
The situation of test fixture is inserted in direction, i.e. rotation turnback, if now energising, usually can cause integrated circuit permanent damages
Serious consequence.
The integrated circuit that when how to avoid testing, anti-plug causes damages problem, there is presently no technical guarantee measure, still needs to
Rely on the careful appearance reducing anti-plug situation of test operator.
Summary of the invention
It is an object of the invention to provide a kind of integrated circuit anti-plug detection protection device, this device can interpolate that out integrated
Circuit whether anti-plug when test, and confirming that integrated circuit grafting is just powered after correct, it is ensured that the test of integrated circuit
Safety.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of integrated circuit anti-plug detection protection device, including voltage sampling circuit, comparator, reference voltage circuit, first opens
Close drive circuit, second switch drive circuit and the 3rd switch delay driving circuit；Voltage sampling circuit is used for and integrated circuit
Two pins be connected, gather the voltage of resistance between two pins；The in-phase input end of the voltage input comparator gathered, base
The outfan of quasi-potential circuit is connected with the inverting input of comparator, and the outfan of comparator is electric with the first switch drive respectively
Road, second switch drive circuit and the 3rd switch delay driving circuit be connected, the first switch driving circuit be low level conducting,
High level ends, and second switch drive circuit and the 3rd switch delay driving circuit are high level conducting, low level cut-off；The
The outfan of one switch driving circuit connects has anti-plug to indicate warning circuit, and the outfan connection of second switch drive circuit has slotting
Connecing correct indicating circuit, the outfan of the 3rd switch delay driving circuit connects has the first relay, by the first relay
Contact controls the break-make of test power supply and ic power interface.
Further, described device also includes that the second relay, the second relay are driven by second switch drive circuit
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 also wraps
Including latching circuit, the outfan of comparator, when voltage sampling circuit is with two pin break-makes of integrated circuit, is protected by latching circuit
Hold at high level.
The invention has the beneficial effects as follows: during integrated circuit anti-plug, the resistance between two pins is more than and integrated circuit
Resistance between two other pin of central point distribution, so that integrated circuit is when correct grafting is with anti-plug, electricity
Pressure sample circuit can obtain different voltage, utilizes different voltage to make comparator in the correct grafting of integrated circuit and anti-plug time-division
Not Shu Chu high level and low level, utilize high level and low level to drive different switch driving circuits, it is achieved to integrated circuit
The judgement of anti-plug is reported to the police with prompting；And make test power supply and integrated circuit disconnect when anti-plug, in grafting by relay
Energising time correct, it is ensured that the test safety of integrated circuit.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings:
Fig. 1 is the electrical principle block diagram of the present invention；
Fig. 2 is the electrical schematic diagram of the present invention.
Detailed description of the invention
As it is shown in figure 1, the present invention provides a kind of integrated circuit anti-plug detection protection device, including voltage sampling circuit 1, ratio
Relatively device N1, reference voltage circuit the 2, first switch driving circuit 3, second switch drive circuit 4 and the 3rd switch delay and running electricity
Road 5；Voltage sampling circuit 1, for being connected with two pins of integrated circuit U1, gathers the voltage of resistance between two pins；Adopt
The inverting input of the in-phase input end of the voltage input comparator N1 of collection, the outfan of reference voltage circuit 2 and comparator N1
Being connected, the outfan of comparator N1 prolongs with the first switch driving circuit 3, second switch drive circuit 4 and the 3rd switch respectively
Time drive circuit 5 be connected, the first switch driving circuit 3 is low level conducting, high level cut-off, second switch drive circuit 4 and
3rd switch delay driving circuit 5 is high level conducting, low level cut-off；The outfan of the first switch driving circuit 3 connects
Having anti-plug to indicate warning circuit 6, the outfan of second switch drive circuit 4 connects the correct indicating circuit of grafting 7, the 3rd switch
The outfan of delay driving circuit 5 connects the first relay K 1, by the contact of the first relay K 1 control test power supply with
The break-make of ic power interface；Described device also includes that the second relay K 2, the second relay K 2 are driven by second switch
Circuit 4 is driven, and realizes the logical of voltage sampling circuit 1 and two pins of integrated circuit U1 by the contact of the second relay K 2
Disconnected；Described device also includes latching circuit 8, and latching circuit 8 is in voltage sampling circuit 1 and two pin break-makes of integrated circuit U1
Time, the outfan of comparator N1 is maintained at high level.
Illustrate the operation principle of the present invention below in conjunction with Fig. 2, one end of resistance R1 connects power supply VCC1, and the other end is even
Connecing as connecting the interface of integrated circuit U1 after the normally-closed contact of the second relay K 2, one end ground connection of resistance R2, the other end divides
Not Lian Jie the in-phase input end of comparator N1 and another normally-closed contact of the second relay K 2, and as connecting integrated circuit U1
Another interface；The IN end that reference voltage circuit 2 comprises reference voltage chip N2, reference voltage chip N2 connects power supply
VCC2, GND end ground connection, is connected between GND end with ADJ end and has adjustable resistance R12, and being connected between OUT terminal with ADJ end has adjustable electric
Resistance R13, OUT terminal is connected to the inverting input of comparator N1；First switch driving circuit 3 comprises audion V4, audion V4
Base stage connected the outfan of comparator N1 by resistance R4, the emitter stage of audion V4 connects power supply VCC3, the two of resistance R5
End is connected with emitter stage and the base stage of audion V4 respectively；Anti-plug instruction warning circuit 6 comprises light emitting diode V2 and buzzer
The colelctor electrode of the anode connecting triode V4 of BUZ, light emitting diode V2, the negative electrode of light emitting diode V2 passes through resistance R6 ground connection,
The colelctor electrode of the positive pole connecting triode V4 of buzzer BUZ, the negative pole of buzzer BUZ passes through resistance R7 ground connection；Second switch drives
Galvanic electricity road 4 comprises audion V5, and the base stage of audion V5 connects resistance R8 and resistance R9 respectively, the other end of resistance R8 with compare
The outfan of device N1 is connected, the other end ground connection of resistance R9, the grounded emitter of audion V5；The correct indicating circuit of grafting 7 wraps
Anode containing light emitting diode V3, light emitting diode V3 connects power supply VCC4, and the negative electrode of light emitting diode V3 is by resistance R11 even
Connect the colelctor electrode of audion V5；3rd switch delay driving circuit 5 comprises audion V6, and the base stage of audion V6 connects electricity respectively
Resistance R14, R15 and electric capacity C1, the other end of resistance R14 is connected with the outfan of comparator N1, another of resistance R15 and electric capacity C1
Hold equal ground connection, the grounded emitter of audion V6, collector series resistance R16 of audion V6 and the coil of relay K 1, continue
The other end of electrical equipment K1 coil connects power supply VCC2；A pair normally opened contact of relay K 1 is as the power supply connecting integrated circuit U1
Interface, a pair common port of relay K 1 connects power supply VCC and VSS respectively；Latching circuit 8 comprises resistance R3 and two poles of series connection
Pipe V1, the anode of diode V1 is connected with the outfan of comparator N1, one end of resistance R3 and the in-phase input end of comparator N1
It is connected.
In use, selecting two pins m, n of integrated circuit U 1, the resistance between them is Ri1, and m, n are about integrated
Two other pin of circuit U 1 central point distribution is p, q, and the resistance between p, q is Ri2, makes Ri1 ＜ Ri2；If running into
The selected resistance between two pins and relative to the electricity between two other pin of IC Center's point symmetry distribution
Hinder equal or closely time, because the pin of integrated circuit is a lot, the electricity between pin can be made by choosing other pin completely
Resistance meets Ri1 ＜ Ri2, and both resistance sizes have obvious difference.It is same that pin m, n are not limited at integrated circuit
Side, can arbitrarily choose, the integrated circuit to single-row lead-in wire, and same method can be used to choose.
When integrated circuit U1 anti-plug is on test fixture, a pair normally-closed contact of relay K 2 respectively with integrated circuit U1
P, q pin be connected, R1, Ri2 and R2 are connected into loop, due to Ri2 > Ri1, the now voltage of comparator N1 in-phase input end
During Vf plug-in mounting correct relative to integrated circuit less, by regulation adjustable resistance R12 and R13, make reference voltage chip N2 export
Reference voltage V ref > Vf, comparator N1 output low level, audion V4 turns on, and light emitting diode V2 is luminous, buzzer simultaneously
BUZ pipes, and reminds integrated circuit U1 anti-plug；Meanwhile, owing to comparator N1 is output as low level, audion V5 ends,
Light emitting diode V3 is the most luminous, and relay K 2 must not be electric, remains in that original state；Audion V6 ends, and relay K 1 must not
Electricity, its normally opened contact not adhesive, power supply VCC, VSS power to integrated circuit U1.
When integrated circuit correctly inserts on test fixture, a pair normally-closed contact of relay K 2 respectively with integrated circuit U1
M, n pin be connected, R1, Ri1 and R2 are connected into loop, due to Ri1 ＜ Ri2, the now voltage of comparator N1 in-phase input end
Vt is relatively big relative to during integrated circuit anti-plug, and Vref ＜ Vt, comparator N1 export high level, and audion V4 ends, light-emitting diodes
Pipe V2 is the most luminous, and buzzer BUZ does not pipes；Meanwhile, owing to comparator N1 is output as high level, audion V5 turns on,
Light emitting diode V3 luminescence, prompting integrated circuit grafting is correct；Relay K 2 obtains electric, and the normally-closed contact of relay K 2 disconnects,
Normally opened contact closes, and makes m, n pin of integrated circuit U1 disconnect from this device interface, prevents this device to integrated circuit testing
Impact；Owing to comparator N1 is output as high level, the time-lag action of electric capacity C1, audion V6 leads relative to audion V5 time delay
Logical, relay K 1 obtains electric, and the normally opened contact Guan Bi of relay K 1, normally-closed contact disconnect, and make power supply VCC Yu VSS to integrated circuit
U1 powers.Audion V6 is relative to audion V5 Delayed conducting, it can be ensured that when powering up to integrated circuit U1, sample circuit is
Disconnect with integrated circuit, to prevent sample circuit from integrated circuit testing being impacted.Comparator N1 output high level makes two poles
Pipe V1 turns on, and the in-phase input end of comparator N1 is maintained at high level, makes the outfan of comparator N1 maintain high level, plays
The purpose of self-locking, makes the voltage sampling circuit of this device after disconnecting with integrated circuit, comparator N1 outfan still can be made to tie up
Hold at high level.
The above, be only presently preferred embodiments of the present invention, and the present invention not makees any pro forma restriction；Appoint
What those of ordinary skill in the art, without departing under technical solution of the present invention ambit, may utilize the side of the disclosure above
Technical solution of the present invention is made many possible variations and modification by method and technology contents, or the equivalence being revised as equivalent variations is real
Execute example.Therefore, every content without departing from technical solution of the present invention, according to the technical spirit of the present invention, above example is done
Any simple modification, equivalent, equivalence change and modify, all still fall within technical solution of the present invention protection in the range of.
Claims (2)
1. an integrated circuit anti-plug detection protection device, it is characterised in that include voltage sampling circuit, comparator, benchmark electricity
Volt circuit, the first switch driving circuit, second switch drive circuit and the 3rd switch delay driving circuit；Voltage sampling circuit is used
It is connected in two pins with integrated circuit, gathers the voltage of resistance between two pins；The voltage input comparator gathered
In-phase input end, the outfan of reference voltage circuit is connected with the inverting input of comparator, the outfan of comparator respectively with
First switch driving circuit, second switch drive circuit and the 3rd switch delay driving circuit are connected, the first switch drive electricity
Road is low level conducting, high level cut-off, and second switch drive circuit and the 3rd switch delay driving circuit are high level and lead
Logical, low level cut-off；The outfan of the first switch driving circuit connects has anti-plug to indicate warning circuit, second switch drive circuit
Outfan connect and have a correct indicating circuit of grafting, the outfan of the 3rd switch delay driving circuit connects the first relay,
The break-make of test power supply and ic power pin is controlled by the contact of the first relay.
A kind of integrated circuit anti-plug detection protection device the most according to claim 1, it is characterised in that described device also wraps
Including the second relay, the second relay is driven by second switch drive circuit, realizes electricity by the contact of the second relay
Pressure sample circuit and the break-make of two pins of integrated circuit；Described device also includes latching circuit, and latching circuit is at voltage sample
When circuit and two pin break-makes of integrated circuit, the outfan of comparator is maintained at 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 true CN106300319A (en) | 2017-01-04 |
| CN106300319B CN106300319B (en) | 2018-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610643553.8A Active CN106300319B (en) | 2016-08-08 | 2016-08-08 | A kind of integrated circuit anti-plug detection protective device |
Country Status (1)
| Country | Link |
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| CN (1) | CN106300319B (en) |
Cited By (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 |
| CN107884604A (en) * | 2017-12-14 | 2018-04-06 | 池州职业技术学院 | A kind of optoelectronic switch break-make level sensitive circuit |
| CN109813998A (en) * | 2019-01-14 | 2019-05-28 | 珠海格力电器股份有限公司 | Digital equipment interface humidity detection circuit and terminal |
| CN114838635A (en) * | 2022-05-23 | 2022-08-02 | 华东光电集成器件研究所 | Digital detonator detonation control interface overcurrent short-circuit protection circuit and control method |
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| 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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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 |
Cited By (6)
| 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 |
| CN107884604A (en) * | 2017-12-14 | 2018-04-06 | 池州职业技术学院 | A kind of optoelectronic switch break-make level sensitive circuit |
| 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 | Digital equipment interface humidity detection circuit and terminal |
| CN114838635A (en) * | 2022-05-23 | 2022-08-02 | 华东光电集成器件研究所 | Digital detonator detonation control interface overcurrent short-circuit protection circuit and control method |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN106300319B (en) | 2018-08-17 |
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