CN107192963A - A kind of circuit and implementation method that function is detected with short interruption - Google Patents
A kind of circuit and implementation method that function is detected with short interruption Download PDFInfo
- Publication number
- CN107192963A CN107192963A CN201710482057.3A CN201710482057A CN107192963A CN 107192963 A CN107192963 A CN 107192963A CN 201710482057 A CN201710482057 A CN 201710482057A CN 107192963 A CN107192963 A CN 107192963A
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000000087 stabilizing effect Effects 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 5
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
Classifications
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- 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
- G01R31/40—Testing power supplies
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- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention relates to a kind of circuit and implementation method that function is detected with short interruption, input voltage+5V is passed through into current limliting chip N3, whether the electric current for comparing input exceedes the 300mA short-circuit current values limited, if electric current is no more than 300mA, it is determined as not short-circuit, if electric current is more than 300mA, it is determined as short circuit；If in the case of not short-circuit, current limliting chip N3 output current values become output voltage after resistance R2, powered to anti-jamming circuit, simultaneously by resistance R2 both end voltage input amplifier N1, first pass around amplifier N1 and magnitude of voltage is amplified 50 times, then it is compared as the reference voltage with comparator N2 reference voltages into comparator N2 through resistance R3 and resistance R4 partial pressures, if the electric current of input open circuit is determined as not breaking more than 40mA；If being determined as open circuit no more than 40mA.Feature is：It ensure that " Beidou II " anti-interference antenna can be with normal work.
Description
Technical field
The present invention relates to a kind of circuit and implementation method that function is detected with short interruption, it can be determined that " Beidou II "
The power supply of anti-interference antenna whether occur short circuit and open circuit situation, with ensure anti-interference antenna can with normal work, if
Failure can find to solve in time.
Background technology
" Big Dipper two " is the satellite navigation system that China voluntarily develops, and can provide a user high-precision navigation, determine
Position and time service service.The satellite-signal of Big Dipper B3 frequencies is more widely used in military domain.But due to satellite-signal
Power is very faint, it is easy to by various interference, and then influences the accuracy of its navigation, positioning and time service, therefore
Satellite navigation system Anti-Jamming Technique is used widely.In anti-interference antenna, typically supplied by the power panel of antenna to antenna
Electricity, if power panel can be powered when breaking down by receiver to antenna, it is therefore necessary to ensure that both has one normally to supply
Electricity, if without this short interruption circuit, it is difficult to which it is that antenna is abnormal caused by power supply trouble to judge, it is therefore desirable to which short circuit is disconnected
Alignment detection circuit goes to judge whether power supply is normal, judges whether antenna can be with normal work, so as to carry for anti-interference antenna with this
For necessary condition.
The content of the invention
In view of the situation that prior art is present, the present invention provides a kind of circuit and realization that function is detected with short interruption
Method, the circuit carries out short interruption detection to the power supply of anti-interference antenna, and the short circuit of generation and trip flag is defeated
Go out.
The technical solution used in the present invention is：A kind of circuit and implementation method that function is detected with short interruption, its
It is characterised by：Including amplifier N1, comparator N2, current limiting switch chip N3, voltage stabilizing chip N4, the amplifier N1 respectively with than
Compared with device N2 and the N3 connections of current limiting switch chip, voltage stabilizing chip N4 is amplifier N1, comparator N2, current limiting switch N3 provide power supply,
The OPEN marks of the not short-circuit high level signal of current limiting switch chip N3 output power supplies or the low level signal of short circuit, compare
The OPEN marks of the not breaking high level signal of device N2 output power supplies or the low level signal of open circuit；
Physical circuit is connected as：
Electric capacity C2 one end ground connection, the electric capacity C2 other end connects the 1 of+5V, resistance R6 one end and current limiting switch chip N3 respectively
Pin, current limiting switch chip N3 2 pin ground connection, the current limiting switch chip N3 3 pin connecting resistance R6 other end, current limiting switch chip N3
4 pin connection resistance R8 one end and export SHORT marks, resistance R8 another termination+3.3V, the 5 of current limiting switch chip N3
Pin distinguishes 3 pin of connecting resistance R2 one end, electric capacity C3 one end and amplifier N1, and the electric capacity C3 other end is grounded, resistance R2's
The other end connects output voltage and amplifier N1 2 pin respectively, and amplifier N1 1 pin connects+5V, electric capacity C1 one end and amplification respectively
Device N1 7 pin, electric capacity C1 one end ground connection, amplifier N1 4 pin, 8 pin ground connection, 5 pin are hanging, and amplifier N1 6 pin connect respectively
3 pin of resistance R3 one end, resistance R4 one end and comparator N2, resistance R3 another termination+3.3V, the resistance R4 other end
Ground connection, comparator N2 1 pin connecting resistance R1 one end, resistance R1 other end output OPEN marks, comparator N2 2 pin connect
Ground, comparator N2 4 pin difference connecting resistance R5 one end and resistance R7 one end；Resistance R5 another termination+3.3V, resistance R7
Other end ground connection, comparator N2 5 pin connect+3.3V and electric capacity C4 one end respectively, electric capacity C4 other end ground connection, voltage stabilizing core
Piece N4 1 pin and 3 pin connects+5V, electric capacity C5 one end respectively, electric capacity C5 other end ground connection, and comparator N2 5 pin connect respectively+
3.3V and electric capacity C6 one end, electric capacity C6 other end ground connection；
Amplifier N1 model：MAX4071AUA；
Comparator N2 model：MAX999XEUK-T；
Current limiting switch chip N3 model：MAX4917AEUK+T；
Voltage stabilizing chip N4 model：ADP150AUJZ-3.3-R7.
A kind of circuit implementing method that function is detected with short interruption, step is as follows：
By current limliting chip N3s of the input voltage+5V by short circuit current, whether the electric current for comparing input is short more than the 300mA limited
Road current value, judges short-circuit conditions, and is exported by current limliting chip N3 4 pins, SHORT is masked as, if electric current is no more than
300mA, export high level, be determined as it is not short-circuit, if electric current exceed 300mA, output low level, be determined as short circuit；If not short
In the case of road, the current limliting chip N3 of short circuit current OUT pins output current value becomes output voltage after resistance R2, gives
Anti-jamming circuit is powered, while resistance R2 both end voltage is inputted in the amplifier N1 of open circuit, first passes around amplifier
Magnitude of voltage is amplified 50 times by N1, and comparator N2 3 pins are then entered through resistance R3 and resistance R4 partial pressures, electric after electric resistance partial pressure
The 4 pin reference voltages as the reference voltage with comparator N2 are pressed to be compared, output identification is OPEN, if input open circuit
Electric current more than 40mA, then export high level, be determined as not breaking；Low level, which is exported, if 40mA is no more than is determined as open circuit.
The beneficial effects of the invention are as follows：This circuit by judging the size of electric current in antenna to ensure antenna normal work,
It is determined as short circuit if current value is more than required value, output short-circuit signal is stopped by antenna, to prevent from burning out antenna；If
Current value is then determined as open circuit less than required value, then should check whether connected between a period of time and processor, whether for upper electricity etc.
Situation, it is ensured that the normal work of " Beidou II " satellite navigation system.
Brief description of the drawings
Fig. 1 connects block diagram for the circuit of the present invention；
Fig. 2 is circuit theory diagrams of the invention.
Embodiment
As shown in Figure 1, 2, a kind of circuit and implementation method that function is detected with short interruption, it is characterised in that：Including
Amplifier N1, comparator N2, current limiting switch chip N3, voltage stabilizing chip N4, the amplifier N1 respectively with comparator N2 and current limliting
Switch chip N3 connections, voltage stabilizing chip N4 is amplifier N1, comparator N2, current limiting switch N3 provide power supply, current limiting switch chip
The OPEN marks of the not short-circuit high level signal of N3 output power supplies or the low level signal of short circuit, comparator N2 output power supplies
The OPEN marks of the not breaking high level signal of power supply or the low level signal of open circuit.
Physical circuit is connected as：
Electric capacity C2 one end ground connection, the electric capacity C2 other end connects the 1 of+5V, resistance R6 one end and current limiting switch chip N3 respectively
Pin, current limiting switch chip N3 2 pin ground connection, the current limiting switch chip N3 3 pin connecting resistance R6 other end, current limiting switch chip N3
4 pin connection resistance R8 one end and export SHORT marks, resistance R8 another termination+3.3V, the 5 of current limiting switch chip N3
Pin distinguishes 3 pin of connecting resistance R2 one end, electric capacity C3 one end and amplifier N1, and the electric capacity C3 other end is grounded, resistance R2's
The other end connects output voltage and amplifier N1 2 pin respectively, and amplifier N1 1 pin connects+5V, electric capacity C1 one end and amplification respectively
Device N1 7 pin, electric capacity C1 one end ground connection, amplifier N1 4 pin, 8 pin ground connection, 5 pin are hanging, and amplifier N1 6 pin connect respectively
3 pin of resistance R3 one end, resistance R4 one end and comparator N2, resistance R3 another termination+3.3V, the resistance R4 other end
Ground connection, comparator N2 1 pin connecting resistance R1 one end, resistance R1 other end output OPEN marks, comparator N2 2 pin connect
Ground, comparator N2 4 pin difference connecting resistance R5 one end and resistance R7 one end；Resistance R5 another termination+3.3V, resistance R7
Other end ground connection, comparator N2 5 pin connect+3.3V and electric capacity C4 one end respectively, electric capacity C4 other end ground connection, voltage stabilizing core
Piece N4 1 pin and 3 pin connects+5V, electric capacity C5 one end respectively, electric capacity C5 other end ground connection, and comparator N2 5 pin connect respectively+
3.3V and electric capacity C6 one end, electric capacity C6 other end ground connection.
Amplifier N1 model：MAX4071AUA.
Comparator N2 model：MAX999XEUK-T.
Current limiting switch chip N3 model：MAX4917AEUK+T.
Voltage stabilizing chip N4 model：ADP150AUJZ-3.3-R7.
A kind of to use the circuit implementing method that function is detected with short interruption, step is as follows：
By current limliting chip N3s of the input voltage+5V by short circuit current, whether the electric current for comparing input is short more than the 300mA limited
Road current value, judges short-circuit conditions, and is exported by current limliting chip N3 4 pins, SHORT is masked as, if electric current is no more than
300mA, export high level, be determined as it is not short-circuit, if electric current exceed 300mA, output low level, be determined as short circuit；If not short
In the case of road, the current limliting chip N3 of short circuit current OUT pins output current value becomes output voltage after resistance R2, gives
Anti-jamming circuit is powered, while resistance R2 both end voltage is inputted in the amplifier N1 of open circuit, first passes around amplifier
Magnitude of voltage is amplified 50 times by N1, and comparator N2 3 pins are then entered through resistance R3 and resistance R4 partial pressures, electric after electric resistance partial pressure
The 4 pin reference voltages as the reference voltage with comparator N2 are pressed to be compared, output identification is OPEN, if input open circuit
Electric current more than 40mA, then export high level, be determined as not breaking；Low level, which is exported, if 40mA is no more than is determined as open circuit.
The technical indicator that this circuit reaches is as follows：
It is judged as the electric current of short circuit：≥300mA
It is judged as the electric current of open circuit：≤40mA
Short-circuit output identification OPEN：It is not short-circuit, export high level, high level minimum voltage 2.7V~3.3V；Short circuit, exports low electricity
It is flat, low level minimum voltage 0V~0.6V.
Breaking output identification SHORT：It is not breaking, export high level, high level minimum voltage 2.7V~3.3V；Open circuit, it is defeated
Go out low level, low level minimum voltage 0V~0.6V.
Output voltage：5V.
Claims (2)
1. a kind of circuit that function is detected with short interruption, it is characterised in that：Opened including amplifier N1, comparator N2, current limliting
Close chip N3, voltage stabilizing chip N4, the amplifier N1 to be connected with comparator N2 and current limiting switch chip N3 respectively, voltage stabilizing chip N4
Power supply, the not short-circuit height electricity of current limiting switch chip N3 output power supplies are provided for amplifier N1, comparator N2, current limiting switch N3
The OPEN marks of ordinary mail number or the low level signal of short circuit, comparator N2 output power supplies not breaking high level signal or disconnected
The OPEN marks of the low level signal on road；
Physical circuit is connected as：
Electric capacity C2 one end ground connection, the electric capacity C2 other end connects the 1 of+5V, resistance R6 one end and current limiting switch chip N3 respectively
Pin, current limiting switch chip N3 2 pin ground connection, the current limiting switch chip N3 3 pin connecting resistance R6 other end, current limiting switch chip N3
4 pin connection resistance R8 one end and export SHORT marks, resistance R8 another termination+3.3V, the 5 of current limiting switch chip N3
Pin distinguishes 3 pin of connecting resistance R2 one end, electric capacity C3 one end and amplifier N1, and the electric capacity C3 other end is grounded, resistance R2's
The other end connects output voltage and amplifier N1 2 pin respectively, and amplifier N1 1 pin connects+5V, electric capacity C1 one end and amplification respectively
Device N1 7 pin, electric capacity C1 one end ground connection, amplifier N1 4 pin, 8 pin ground connection, 5 pin are hanging, and amplifier N1 6 pin connect respectively
3 pin of resistance R3 one end, resistance R4 one end and comparator N2, resistance R3 another termination+3.3V, the resistance R4 other end
Ground connection, comparator N2 1 pin connecting resistance R1 one end, resistance R1 other end output OPEN marks, comparator N2 2 pin connect
Ground, comparator N2 4 pin difference connecting resistance R5 one end and resistance R7 one end；Resistance R5 another termination+3.3V, resistance R7
Other end ground connection, comparator N2 5 pin connect+3.3V and electric capacity C4 one end respectively, electric capacity C4 other end ground connection, voltage stabilizing core
Piece N4 1 pin and 3 pin connects+5V, electric capacity C5 one end respectively, electric capacity C5 other end ground connection, and comparator N2 5 pin connect respectively+
3.3V and electric capacity C6 one end, electric capacity C6 other end ground connection；
Amplifier N1 model：MAX4071AUA；
Comparator N2 model：MAX999XEUK-T；
Current limiting switch chip N3 model：MAX4917AEUK+T；
Voltage stabilizing chip N4 model：ADP150AUJZ-3.3-R7.
2. a kind of using the circuit implementing method according to claim 1 that function is detected with short interruption, step is as follows：
By current limliting chip N3s of the input voltage+5V by short circuit current, whether the electric current for comparing input is short more than the 300mA limited
Road current value, judges short-circuit conditions, and is exported by current limliting chip N3 4 pins, SHORT is masked as, if electric current is no more than
300mA, export high level, be determined as it is not short-circuit, if electric current exceed 300mA, output low level, be determined as short circuit；If not short
In the case of road, the current limliting chip N3 of short circuit current OUT pins output current value becomes output voltage after resistance R2, gives
Anti-jamming circuit is powered, while resistance R2 both end voltage is inputted in the amplifier N1 of open circuit, first passes around amplifier
Magnitude of voltage is amplified 50 times by N1, and comparator N2 3 pins are then entered through resistance R3 and resistance R4 partial pressures, electric after electric resistance partial pressure
The 4 pin reference voltages as the reference voltage with comparator N2 are pressed to be compared, output identification is OPEN, if input open circuit
Electric current more than 40mA, then export high level, be determined as not breaking；Low level, which is exported, if 40mA is no more than is determined as open circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710482057.3A CN107192963A (en) | 2017-06-22 | 2017-06-22 | A kind of circuit and implementation method that function is detected with short interruption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710482057.3A CN107192963A (en) | 2017-06-22 | 2017-06-22 | A kind of circuit and implementation method that function is detected with short interruption |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107192963A true CN107192963A (en) | 2017-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710482057.3A Pending CN107192963A (en) | 2017-06-22 | 2017-06-22 | A kind of circuit and implementation method that function is detected with short interruption |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107192963A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181570A (en) * | 2017-12-20 | 2018-06-19 | 上海东软载波微电子有限公司 | Chip ground pin continuity testing method and device, readable storage medium storing program for executing |
| CN109150203A (en) * | 2018-07-13 | 2019-01-04 | 上海移远通信技术股份有限公司 | A kind of antenna switching circuit and antenna system |
| CN109633362A (en) * | 2019-01-30 | 2019-04-16 | 努比亚技术有限公司 | Intelligent terminal designs circuit, intelligent terminal and intelligent terminal method for detecting short circuit |
| CN110891349A (en) * | 2019-05-31 | 2020-03-17 | 杭州电子科技大学 | Intelligent automatic detection circuit for lamp bead faults of LED street lamp |
| CN111815880A (en) * | 2020-08-07 | 2020-10-23 | 成都惠之慧安全科技有限公司 | Electric fire and gas intelligent monitoring alarm system |
| CN115060963A (en) * | 2022-08-17 | 2022-09-16 | 天津七六四通信导航技术有限公司 | Circuit for detecting current voltage of radio frequency front end of receiver and implementation method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101217231A (en) * | 2008-01-14 | 2008-07-09 | 常熟开关制造有限公司(原常熟开关厂） | A control and protective circuit on control and protective switch electric apparatus |
| CN101702506A (en) * | 2009-10-30 | 2010-05-05 | 中国船舶重工集团公司第七一九研究所 | Method and device for rapidly detecting short-circuit fault of power system |
| CN201608502U (en) * | 2009-10-30 | 2010-10-13 | 中国船舶重工集团公司第七一九研究所 | Quick short-circuit fault detecting device for power system |
| CN104483590A (en) * | 2014-12-24 | 2015-04-01 | 天津七六四通信导航技术有限公司 | Satellite navigation antenna state judgment circuit and implementation method thereof |
| US20170077695A1 (en) * | 2015-09-15 | 2017-03-16 | Wuxi Chipown Micro-Electronics Limited | Short-circuit protection circuit for voltage sampling resistor of primary side converter |
| CN207096363U (en) * | 2017-06-22 | 2018-03-13 | 天津七六四通信导航技术有限公司 | A kind of circuit with short interruption detection function |
-
2017
- 2017-06-22 CN CN201710482057.3A patent/CN107192963A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101217231A (en) * | 2008-01-14 | 2008-07-09 | 常熟开关制造有限公司(原常熟开关厂） | A control and protective circuit on control and protective switch electric apparatus |
| CN101702506A (en) * | 2009-10-30 | 2010-05-05 | 中国船舶重工集团公司第七一九研究所 | Method and device for rapidly detecting short-circuit fault of power system |
| CN201608502U (en) * | 2009-10-30 | 2010-10-13 | 中国船舶重工集团公司第七一九研究所 | Quick short-circuit fault detecting device for power system |
| CN104483590A (en) * | 2014-12-24 | 2015-04-01 | 天津七六四通信导航技术有限公司 | Satellite navigation antenna state judgment circuit and implementation method thereof |
| US20170077695A1 (en) * | 2015-09-15 | 2017-03-16 | Wuxi Chipown Micro-Electronics Limited | Short-circuit protection circuit for voltage sampling resistor of primary side converter |
| CN207096363U (en) * | 2017-06-22 | 2018-03-13 | 天津七六四通信导航技术有限公司 | A kind of circuit with short interruption detection function |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181570A (en) * | 2017-12-20 | 2018-06-19 | 上海东软载波微电子有限公司 | Chip ground pin continuity testing method and device, readable storage medium storing program for executing |
| CN108181570B (en) * | 2017-12-20 | 2020-07-03 | 上海东软载波微电子有限公司 | Chip grounding pin connectivity test method and device and readable storage medium |
| CN109150203A (en) * | 2018-07-13 | 2019-01-04 | 上海移远通信技术股份有限公司 | A kind of antenna switching circuit and antenna system |
| CN109633362A (en) * | 2019-01-30 | 2019-04-16 | 努比亚技术有限公司 | Intelligent terminal designs circuit, intelligent terminal and intelligent terminal method for detecting short circuit |
| CN110891349A (en) * | 2019-05-31 | 2020-03-17 | 杭州电子科技大学 | Intelligent automatic detection circuit for lamp bead faults of LED street lamp |
| CN110891349B (en) * | 2019-05-31 | 2021-09-07 | 杭州电子科技大学 | Intelligent automatic detection circuit for lamp bead faults of LED street lamp |
| CN111815880A (en) * | 2020-08-07 | 2020-10-23 | 成都惠之慧安全科技有限公司 | Electric fire and gas intelligent monitoring alarm system |
| CN111815880B (en) * | 2020-08-07 | 2021-04-06 | 成都惠之慧安全科技有限公司 | Electric fire and gas intelligent monitoring alarm system |
| CN115060963A (en) * | 2022-08-17 | 2022-09-16 | 天津七六四通信导航技术有限公司 | Circuit for detecting current voltage of radio frequency front end of receiver and implementation method |
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Application publication date: 20170922 |