CN105356863A - Fast recovery detection delay circuit with monostable characteristic - Google Patents
Fast recovery detection delay circuit with monostable characteristic Download PDFInfo
- Publication number
- CN105356863A CN105356863A CN201510631243.XA CN201510631243A CN105356863A CN 105356863 A CN105356863 A CN 105356863A CN 201510631243 A CN201510631243 A CN 201510631243A CN 105356863 A CN105356863 A CN 105356863A
- Authority
- CN
- China
- Prior art keywords
- circuit
- resistance
- diode
- output
- fast recovery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/023—Generators characterised by the type of circuit or by the means used for producing pulses by the use of differential amplifiers or comparators, with internal or external positive feedback
- H03K3/0232—Monostable circuits
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention provides a fast recovery detection delay circuit with a monostable characteristic. The circuit comprises an input end, an often control circuit, a comparison circuit, a reset circuit and an output end, wherein the input end is connected to the output end through the often control circuit and the comparison circuit; one end of the reset circuit is connected to the ground and the other signal end is connected to the output end of the comparison circuit. The circuit has the characteristic of outputting transient output under instant triggering and maintaining the transient output for some time; the delay time has a stable and customized characteristic; threshold trigger voltage can be freely provided through adjusting V2, so that the circuit can be widely applied to narrow-pulse shaping, delay and timing circuits and a protection circuit system as a monostable circuit; if the circuit is applied to a protection circuit, the circuit can flexibly provide excellent detection and delay for the protection circuit, when the circuit informs the system to cut off power protection, the circuit provides reliable protection delay, so that the stability of the system is improved.
Description
Technical field
The present invention relates to testing lag circuit engineering field, be specifically related to a kind of fast recovery testing lag circuit with monostable characteristic.
Background technology
Monostable circuit (adopts digital device to make monostable circuit, below all monostable circuit is called for short) transient state can be exported under the instantaneous triggering of input, and export stable state after transient state is exported maintenance a period of time, and maintain do not affected by triggering signal amplitude during this period of time, this characteristic makes single-shot trigger circuit be widely used in shaping pulse, time delay and timing circuit.Outside the characteristic of the monostable circuit that usual monostable circuit has, its difference is, the threshold voltage of monostable circuit can not by the arbitrary adjustment of designer, and this makes monostable circuit can not be widely used for as protective circuit detects.But; for protective circuit; if system make cut off the electricity supply protection time; just can restore electricity immediately when not certain delay, the stability of this system is insecure, and the present invention has monostable circuit all advantages; also compensate for the shortcoming of above-mentioned monostable circuit simultaneously; this makes the present invention can use as monostable circuit, can also use in the protection circuit, thus improve the stability of system.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of fast recovery testing lag circuit with monostable characteristic, this fast recovery testing lag circuit with monostable characteristic is by control circuit, comparison circuit, reset circuit, input and output form often, input passes through control circuit often and is connected with output with comparison circuit, one end ground connection of described reset circuit, another signal end is connected with comparison circuit output.
The present invention is achieved by the following technical programs.
A kind of fast recovery testing lag circuit with monostable characteristic provided by the invention, comprise control circuit, comparison circuit and reset circuit often, one end of described comparison circuit is connected with input, and the other end is connected with output; Described control circuit is often parallel to the comparison circuit section of company after connecting with reset circuit.
Described reset circuit comprises diode D1, resistance R3, electric capacity C1, resistance R4, the positive terminal ground connection of diode D1 after diode D1, electric capacity C1 and resistance R4 connect successively, the other end of resistance R4 is connected with the output of comparison circuit, and resistance R3 is in parallel with diode D1.
Described control circuit often comprises resistance R1, resistance R3, resistance R2, C1 and diode D2, and one end of resistance R1 connects voltage V1, and the other end is connected with electric capacity C1; The electric capacity C1 other end is connected with the positive pole of resistance R3 and diode D2 respectively, the other end ground connection of resistance R3, and the negative pole of diode D2 is connected with delay circuit input by resistance R2; The negative pole of diode D2 is also connected with the input of comparison circuit.
Described comparison circuit comprises comparator U1A, and the in-phase input end of comparator U1A is connected with delay circuit input by resistance R2, and reverse input end is connected with reference voltage V2; The output of comparator U1A is directly connected with the output of delay circuit, or be connected with the output of delay circuit after series resistance again.
Described resistance R4 short-circuit line replaces.
Described diode D1 opens a way, and resistance R4 short-circuit line replaces.
Described resistance R3 opens a way.
Described resistance R1 opens a way.
That one end that described resistance R1 is connected with electric capacity C1 is connected to the output of delay circuit.
Described comparator U1A is comparator chip or operational amplifier.
Beneficial effect of the present invention is: the lag characteristic that the present invention has transient state triggering and keeps transient state to export, described time of delay and input also have the stable characteristic that can customize setting, thresholding trigger voltage of the present invention is also by adjustment V2 free setting in addition, this makes the present invention can be widely used as single-shot trigger circuit in burst pulse shaping, in time delay and regularly electricity Deng road, can be used in again in protective circuit system, and, if the present invention uses in the protection circuit, it can also spirit and provide detection and the delay of superior performance for protective circuit, when its reporting system needs to cut off the electricity supply protection, it will provide reliable guard delay simultaneously, thus improve the stability of system.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention;
Fig. 2 is the circuit theory diagrams in Fig. 1.
Embodiment
Further describe technical scheme of the present invention below, but described in claimed scope is not limited to.
A kind of fast recovery testing lag circuit with monostable characteristic as shown in Fig. 1 ~ 2, comprise control circuit, comparison circuit and reset circuit often, one end of described comparison circuit is connected with input, and the other end is connected with output; Described control circuit is often parallel to the comparison circuit section of company after connecting with reset circuit.
Described reset circuit comprises diode D1, resistance R3, electric capacity C1, resistance R4, the positive terminal ground connection of diode D1 after diode D1, electric capacity C1 and resistance R4 connect successively, the other end of resistance R4 is connected with the output of comparison circuit, and resistance R3 is in parallel with diode D1.
Described control circuit often comprises resistance R1, resistance R3, resistance R2, C1 and diode D2, and one end of resistance R1 connects voltage V1, and the other end is connected with electric capacity C1; The electric capacity C1 other end is connected with the positive pole of resistance R3 and diode D2 respectively, the other end ground connection of resistance R3, and the negative pole of diode D2 is connected with delay circuit input by resistance R2; The negative pole of diode D2 is also connected with the input of comparison circuit.
Described comparison circuit comprises comparator U1A, and the in-phase input end of comparator U1A is connected with delay circuit input by resistance R2, and reverse input end is connected with reference voltage V2; The output of comparator U1A is directly connected with the output of delay circuit, or be connected with the output of delay circuit after series resistance again.
Described resistance R4 short-circuit line replaces.When the impulse current of C1 electric discharge can not affect the stability of comparator U1A, available short-circuit line replaces R4.
Described diode D1 opens a way, and resistance R4 short-circuit line replaces.When system does not need to reset in very short time, diode D1 (diode D1 opens a way) can not be used, and resistance R4 short-circuit line replaces, it is structure in a circuit according to the invention, R4 is used to current limliting, when comparison circuit is in output low level, there is the existence of R4, can guarantee that the resetting current produced by C1 does not have too large moment impact electric current, this arranges for the characteristic of optimized circuit, and the C1 capacity in the present invention can be selected less usually, in this case, the impact of the resetting current produced by C1 usually can not the stability of influential system, therefore the usual available short-circuit line of the R4 in the present invention replaces.
Described resistance R3 opens a way.When the output impedance of the circuit outputing signal to input of the present invention is lower, the resistance R3 (resistance R3 opens a way) be connected in parallel on diode D1 can not be used, at this moment C1 charges by R2, at this moment adjust other component parameters of R2 and control circuit often, also can reach Expected Results of the present invention.
Described resistance R1 opens a way.When comparator U1A adopts amplifier, because amplifier itself has the ability of output voltage and electric current, from principle of the present invention, R1 can not use, and directly opens a way.
That one end that described resistance R1 is connected with electric capacity C1 is connected to the output of delay circuit.When U1A is comparator, characteristic essence during the output high level of comparator chip is that comparator exports high-impedance state, at this moment the output open circuit of comparator is equivalent to, therefore according to described in this, that one end reconfiguration resistance R1 being met C1 is to the change of the output of the output of comparator or delay circuit, and the essence of its operation principle does not change.
Described comparator U1A is comparator chip or operational amplifier.
When described comparison circuit U1A adopt be comparator chip time, its course of work is as follows, as the reference voltage V2 that the input signal of input connects lower than comparator reverse input end, comparator U1A is by output low level, when the voltage rising of input meets and exceeds reference voltage V2, comparator U1A will export high resistant, then be high level by voltage V1 by resistance R1 pull-up, simultaneously, electric capacity C1 passes through other elements charging of control circuit often, when electric capacity C1 has just started to charge, its impedance is very little, ideally as short circuit can be regarded, now, if the voltage of input becomes low level suddenly, the in-phase input end of comparator U1A also can be kept above the reference voltage V2 of comparator U1A reverse input end because of the charging effect of electric capacity C1, comparator U1A is made to continue to export high level, and along with the continuous charging of electric capacity C1, the voltage at electric capacity C1 two ends constantly increases, electric capacity C1 charged electrical fails to be convened for lack of a quorum and constantly reduces, when the level dimension not having input input higher than reference voltage V2 continues, from Ohm's law, the in-phase input end voltage of U1A will constantly reduce, when this voltage is reduced to below the reference voltage V2 of comparator U1A reverse input end, comparator U1A will recover output low level, now electric capacity C1 will carry out discharge reduction by reset circuit, for next cycle prepares.
In addition, due to the reverse blocking effect of diode D2, when reference voltage V2 higher than the reverse input end of comparator U1A of the voltage keeps of input, output will continue to export high level, the effect of this characteristic is, if this circuit is with in the protection circuit, and send into the whether action that the signal of input is not protected circuit and the signal be affected, described characteristic can make the present invention be used in such protective circuit to detect safe and reliable too, such as, if the present invention is used for too high to system input voltage and makes detection protection, so, when reference voltage V2 higher than the reverse input end of comparator U1A of the voltage keeps of input, output will continue this characteristic exporting high level, will same energy safeguards system safety.
Because the capacity of the rate of climb and electric capacity C1 self of electric capacity C1 both end voltage is relevant with the impedance of charge circuit and charging voltage, so export holding time of high level by adjusting control circuit often to adjust comparator U1A, when meet can not use resistance R3 (resistance R3 the open a way) be connected in parallel on diode D1, by holding time of adjustment R2 control U1A output high level.Same, when needs carry out repid discharge reset to electric capacity C1, the impedance by reducing reset circuit improves the velocity of discharge of electric capacity C1.Therefore, the electric discharge resume speed that diode D1 can increase substantially electric capacity C1 is added.Because the charging rate of electric capacity C1 and the velocity of discharge are all determined by the parameter of control circuit and reset circuit itself often respectively, this makes the present invention when the transient state being subject to input triggers, output well can keep the high level exporting certain hour, and it exports time of high level, adjust by control circuit often.In addition, the parameter of time also by adjusting reset circuit allowing electric capacity C1 discharge reduction return to initial state adjusts, and when adding diode D1, and when the impedance of the capacity of electric capacity C1 and resistance R4 is all very little, the reset of electric capacity C1 is quickly.
When described comparison circuit U1A adopt be amplifier chip make comparisons device time, because resistance R1 itself has the ability exporting high level, so resistance R1 can delete, resistance R1 place allows it open a way, operation principle during what other operation principles and above-mentioned comparison circuit U1A adopted is amplifier chip makes comparisons device is the same, therefore no longer repeats.
Lift an example to be below specifically described the detection of protective circuit system and delay, the DC brushless motor be such as widely used normally drives with H bridge, DC brushless motor is connected on the power switch pipe of formation H usually, and by driving the power switch pipe forming H to provide power supply to DC brushless motor, when described DC brushless motor is when transshipping, will constantly be increased by its electric current, as this electric current is passed through sampling resistor, so from Ohm's law I=U/R, voltage on described sampling resistor also can rise, if this voltage is sent to input of the present invention detect, output is sent to the protection drive circuit of system, so when described machine operation is abnormal, when being elevated to a certain degree by the electric current of described DC brushless motor, the voltage sending into input of the present invention will exceed set Secure Threshold voltage V2 (V2 sets by calculating or test the data obtained), so output will export high level reporting system protection drive circuit, and allow it turn off the described DC brushless motor power switch pipe of driving, thus cut off the power supply of described DC brushless motor, at this moment, from above-mentioned principle, even described DC brushless motor allows electric current decline fast because of not obtaining power supply, so that the voltage of input is lower than V2, output also can continue the high level exporting a period of time, allow system continued during this period of time in do not power to described DC brushless motor, so just be unlikely to allow system just cut off the power supply of described DC brushless motor, recover immediately again to power to described DC brushless motor, to reach the safety of the DC brushless motor that adequately protects.
The feature that duration of high level and threshold voltage V2 can freely adjust is exported because the present invention has described output; make the present invention that system can be allowed can to make the safeguard protection of cutting off the electricity supply for load fast can recover in time load energy supply again; therefore as the present invention used the protection testing circuit of motor driver; it can allow motor can obtain safe protection, can break into again the ability of band dynamic load to greatest extent.If the present invention used in the protection circuit, it can provide detection and the delay of superior performance for protective circuit, makes system stability reliable.
Claims (10)
1. there is a fast recovery testing lag circuit for monostable characteristic, comprise control circuit, comparison circuit and reset circuit often, it is characterized in that: one end of described comparison circuit is connected with input, and the other end is connected with output; Described control circuit is often parallel to the comparison circuit section of company after connecting with reset circuit.
2. there is the fast recovery testing lag circuit of monostable characteristic as claimed in claim 1, it is characterized in that: described reset circuit comprises diode D1, resistance R3, electric capacity C1, resistance R4, the positive terminal ground connection of diode D1 after diode D1, electric capacity C1 and resistance R4 connect successively, the other end of resistance R4 is connected with the output of comparison circuit, and resistance R3 is in parallel with diode D1.
3. there is the fast recovery testing lag circuit of monostable characteristic as claimed in claim 1, it is characterized in that: described control circuit often comprises resistance R1, resistance R3, resistance R2, C1 and diode D2, one end of resistance R1 connects voltage V1, and the other end is connected with electric capacity C1; The electric capacity C1 other end is connected with the positive pole of resistance R3 and diode D2 respectively, the other end ground connection of resistance R3, and the negative pole of diode D2 is connected with delay circuit input by resistance R2; The negative pole of diode D2 is also connected with the input of comparison circuit.
4. there is the fast recovery testing lag circuit of monostable characteristic as claimed in claim 1, it is characterized in that: described comparison circuit comprises comparator U1A, the in-phase input end of comparator U1A is connected with delay circuit input by resistance R2, and reverse input end is connected with reference voltage V2; The output of comparator U1A is directly connected with the output of delay circuit, or be connected with the output of delay circuit after series resistance again.
5. there is the fast recovery testing lag circuit of monostable characteristic as claimed in claim 2, it is characterized in that: described resistance R4 short-circuit line replaces.
6. have the fast recovery testing lag circuit of monostable characteristic as claimed in claim 2, it is characterized in that: described diode D1 opens a way, resistance R4 short-circuit line replaces.
7. there is the fast recovery testing lag circuit of monostable characteristic as claimed in claim 2 or claim 3, it is characterized in that: described resistance R3 opens a way.
8. there is the fast recovery testing lag circuit of monostable characteristic as claimed in claim 3, it is characterized in that: described resistance R1 opens a way.
9. there is the fast recovery testing lag circuit of monostable characteristic as claimed in claim 3, it is characterized in that: that one end that described resistance R1 is connected with electric capacity C1 is connected to the output of delay circuit.
10. there is the fast recovery testing lag circuit of monostable characteristic as claimed in claim 4, it is characterized in that: described comparator U1A is comparator chip or operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510631243.XA CN105356863B (en) | 2015-09-29 | 2015-09-29 | A kind of fast recovery detection delay circuit with monostable step response |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510631243.XA CN105356863B (en) | 2015-09-29 | 2015-09-29 | A kind of fast recovery detection delay circuit with monostable step response |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105356863A true CN105356863A (en) | 2016-02-24 |
| CN105356863B CN105356863B (en) | 2018-04-13 |
Family
ID=55332763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510631243.XA Active CN105356863B (en) | 2015-09-29 | 2015-09-29 | A kind of fast recovery detection delay circuit with monostable step response |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105356863B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769149A (en) * | 2017-09-18 | 2018-03-06 | 广州白云电器设备股份有限公司 | A kind of self-defined defencive function implementation method of relay equipment based on internal data |
| CN114362094A (en) * | 2021-12-22 | 2022-04-15 | 核工业西南物理研究院 | Overcurrent protection circuit for fast recovery high-voltage power supply system |
| CN116223886A (en) * | 2023-02-15 | 2023-06-06 | 海的电子科技(苏州)有限公司 | Method and device for detecting voltage signal and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1829031A (en) * | 2005-03-03 | 2006-09-06 | 中兴通讯股份有限公司 | Short-circuit protection circuit with self-recovering function |
| US20110060926A1 (en) * | 2008-01-22 | 2011-03-10 | Brooks Robert C | Delay Circuit With Reset Feature |
| CN102496903A (en) * | 2011-11-15 | 2012-06-13 | 深圳桑达国际电子器件有限公司 | Over-current protection circuit, power supply circuit and power supply |
| CN202472326U (en) * | 2012-03-21 | 2012-10-03 | 成都前锋电子有限责任公司 | Monostable protection circuit and automatic water heater control circuit |
| CN103138716A (en) * | 2013-01-31 | 2013-06-05 | 深圳威迈斯电源有限公司 | Power down triggered monostable protection circuit |
-
2015
- 2015-09-29 CN CN201510631243.XA patent/CN105356863B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1829031A (en) * | 2005-03-03 | 2006-09-06 | 中兴通讯股份有限公司 | Short-circuit protection circuit with self-recovering function |
| US20110060926A1 (en) * | 2008-01-22 | 2011-03-10 | Brooks Robert C | Delay Circuit With Reset Feature |
| CN102496903A (en) * | 2011-11-15 | 2012-06-13 | 深圳桑达国际电子器件有限公司 | Over-current protection circuit, power supply circuit and power supply |
| CN202472326U (en) * | 2012-03-21 | 2012-10-03 | 成都前锋电子有限责任公司 | Monostable protection circuit and automatic water heater control circuit |
| CN103138716A (en) * | 2013-01-31 | 2013-06-05 | 深圳威迈斯电源有限公司 | Power down triggered monostable protection circuit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769149A (en) * | 2017-09-18 | 2018-03-06 | 广州白云电器设备股份有限公司 | A kind of self-defined defencive function implementation method of relay equipment based on internal data |
| CN114362094A (en) * | 2021-12-22 | 2022-04-15 | 核工业西南物理研究院 | Overcurrent protection circuit for fast recovery high-voltage power supply system |
| CN116223886A (en) * | 2023-02-15 | 2023-06-06 | 海的电子科技(苏州)有限公司 | Method and device for detecting voltage signal and storage medium |
| CN116223886B (en) * | 2023-02-15 | 2023-09-29 | 海的电子科技(苏州)有限公司 | Method and device for detecting voltage signal and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105356863B (en) | 2018-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203787935U (en) | Over-current protection circuit based on high side current detection | |
| CN104348141A (en) | Overcurrent and overvoltage protection circuit and method for electronic cigarette | |
| CN204517388U (en) | Vehicle electronic control unit power protecting circuit | |
| CN102790374B (en) | Short circuit protection circuit | |
| CN105356863A (en) | Fast recovery detection delay circuit with monostable characteristic | |
| CN104659732A (en) | Overvoltage and overcurrent protecting circuit | |
| CN103199505A (en) | Output short-circuit protection circuit for high tension battery | |
| CN107634504B (en) | Protection control device, the protection controller of PFC pfc circuit | |
| CN203645292U (en) | An overvoltage over-current protection circuit | |
| CN104158152B (en) | A kind of motor driver protection circuit and means of defence | |
| CN201315479Y (en) | Pulse by pulse overcurrent shutoff protective circuit | |
| CN206865122U (en) | A kind of overload protecting circuit for telecommunication circuit | |
| CN203193261U (en) | Protection circuit for output short circuit of high-voltage battery pack | |
| CN209913489U (en) | Wave-by-wave current limiting circuit | |
| CN106300240B (en) | Delay protection circuit | |
| CN202333786U (en) | Drive circuit for restraining IGBT (Insulated Gate Bipolar Transistor) overcurrent | |
| CN204290266U (en) | A kind of current foldback circuit | |
| CN106972459B (en) | Current-limiting protection device | |
| CN103701444A (en) | Power driving circuit with hard real-time overcurrent protection function | |
| CN204118706U (en) | A kind of multiple-channel output high reliability overvoltage crowbar | |
| CN201860092U (en) | Over-current protection circuit of motor and motor controller equipped with the same | |
| CN110829362A (en) | Control circuit of overcurrent protection device and design method thereof | |
| CN202077043U (en) | 485 communication system with strong anti-interference capability | |
| CN104167711A (en) | Self-reset-type delay lock protection device | |
| CN204030548U (en) | A kind of short-circuit protection circuit of frequency changer direct current bus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200612 Address after: Room 406, 4 / F, building 101, No. 3, electronic West Street, electronic industrial park, Yanta District, Xi'an City, Shaanxi Province 710000 Patentee after: Xi'an xinshide Defense Technology Co., Ltd Address before: East Lake 562300 Guizhou Province, Qianxinan Buyei and Miao Autonomous Prefecture Xingren County Street Nga Village Industrial Park Patentee before: GUIZHOU JIANXING TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right |