CN106680575A - Voltage leap detecting circuit and method - Google Patents
Voltage leap detecting circuit and method Download PDFInfo
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- CN106680575A CN106680575A CN201611256770.8A CN201611256770A CN106680575A CN 106680575 A CN106680575 A CN 106680575A CN 201611256770 A CN201611256770 A CN 201611256770A CN 106680575 A CN106680575 A CN 106680575A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16557—Logic probes, i.e. circuits indicating logic state (high, low, O)
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Abstract
The invention discloses a voltage leap detecting circuit and method. The circuit comprises a voltage signal processing circuit, a split-phase delay circuit and a comparing and output circuit which are connected in sequence. The voltage signal processing circuit comprises an instrument amplifier U1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R10 and a voltage-stabilizing diode D1, and the split-phase delay circuit comprises a capacitor C1, a first proportion resistance network formed by a resistor R5 and a resistor R7, and a second proportion resistor network formed by a resistor R6 and a resistor R8. The comparing and output circuit comprises a comparator U2 and a resistor R11. The method comprises the steps that 1, circuit connection is detected; 2, voltage is sampled; 3, voltage leap is judged. The circuit is simple in structure, reasonable in design, convenient to achieve and low in cost, the condition of voltage leap can be fast and effectively detected, high practicality is achieved, the application range is wide, and good application and popularization value is achieved.
Description
Technical field
The invention belongs to voltage jump detection technique field, and in particular to a kind of voltage jump detection circuit and method.
Background technology
Passive perceptual device includes inductance, transformator etc., in being widely used in various circuits, when containing these perceptual devices
When there is disjunction failure in the junction point in the circuit of part, it will voltage jump is produced at the disjunction in loop, and electricity may be caused
Arc or instantaneous high pressure, now, if not adopting certain protective measure, it would be possible to the important devices in defective loop, very
Personal safety to around harm, therefore it is necessary that voltage jump detection is carried out to the both end voltage of perceptual device.
Realize that the mode that voltage jump is detected has at present：1. the design based on high-speed a/d sampling A/D chip and microprocessor, its
Main operational principle is within the regular hour, according to the amplitude of Qian Hou double sampling change in voltage the threshold value of setting whether to be exceeded
To realize detection；2. it is divided into two paths of signals by differential and integrating analog signal processing circuit to be compared, realizes voltage slope
Change the detection at very fast moment, its main operational principle is the time rate of change according to peaker output voltage and input voltage
Proportional, the output voltage of integrating circuit delays input voltage, and the input voltage signal of process is compared, so that it is determined that electric
The moment of pressure mutation.Employing mode design 1., although its accuracy of detection to voltage jump is high, fast response time, but it is needed
The programming of microprocessor being wanted, design complexities are high, and relatively costly, to having inconvenience application person more；Employing mode setting 2.
Meter, its operation principle is simple, and cost of implementation is relatively low, and using convenience, but accuracy of detection is not high, and the selection of circuit parameter is more
It is difficult.
The content of the invention
The technical problem to be solved is for above-mentioned deficiency of the prior art, there is provided a kind of circuit structure
Simply, it is the reasonable in design, situation realizing convenient and low cost, be capable of fast and effeciently detection voltage mutation, practical, applicable
Scope is wide, the detection circuit of the inductance disjunction voltage jump with good application value.
To solve above-mentioned technical problem, the technical solution used in the present invention is：A kind of voltage jump detects circuit, its feature
It is：Delay circuit including the voltage signal processing circuit, split-phase being sequentially connected and compare output circuit, at the voltage signal
Reason circuit includes instrumentation amplifier U1, resistance R1, resistance R2, resistance R3, resistance R4, resistance R10 and Zener diode D1, described
One end of resistance R1 is the sample point cathode voltage input VIN- of voltage signal processing circuit, and one end of the resistance R3 is electricity
The sample point cathode voltage input VIN+ of pressure signal processing circuit, sample point cathode voltage is by the resistance R1 and resistance R2 for connecting
The resistor voltage divider network of composition is connected to ground, the connection end of the resistance R1 and resistance R2 and the anti-phase input of instrumentation amplifier U1
End connection, sample point cathode voltage is connected to ground, the electricity by the resistor voltage divider network that the resistance R3 and resistance R4 that connect are constituted
The connection end of resistance R3 and resistance R4 is connected with the in-phase input end of instrumentation amplifier U1, two gains of the instrumentation amplifier U1
Gain setting resistor RG, the plus earth of the Zener diode D1, the Zener diode D1 are connected between resistance connection end
Negative electrode be connected with the Voltage Reference end of instrumentation amplifier U1, the Voltage Reference end of the instrumentation amplifier U1 also passes through resistance
R10 is connected with the outfan VCC of externally fed power supply；The split-phase delays circuit to include electric capacity C1, by resistance R5 and resistance R7
First proportion resistor network of composition, and the second proportion resistor network being made up of resistance R6 and resistance R8；The resistance R5
Resistance, the resistance of resistance R6, the resistance of the resistance of resistance R7 and resistance R8 meet relational expressionIt is described
One end of resistance R5 is connected with the outfan of instrumentation amplifier U1, and the other end of the resistance R5 is grounded by resistance R7, described
One end of resistance R6 is connected with the outfan of instrumentation amplifier U1, and the other end of the resistance R6 is grounded by resistance R8, described
One end of electric capacity C1 is connected with the connection end of resistance R6 and resistance R8, the other end ground connection of the electric capacity C1；It is described to compare output
Circuit includes comparator U2 and resistance R11, and the in-phase input end of the comparator U2 connects with the connection end of resistance R5 and resistance R7
Connect, the inverting input of the comparator U2 is connected with the connection end of resistance R6 and resistance R8, the outfan of the comparator U2
To compare the outfan OUT of output circuit and being connected with the outfan VCC of externally fed power supply by resistance R11.
Above-mentioned voltage jump detection circuit, it is characterised in that：Model AD623 of the instrumentation amplifier U1.
Above-mentioned voltage jump detection circuit, it is characterised in that：Model 1N5222 of the Zener diode D1.
Above-mentioned voltage jump detection circuit, it is characterised in that：Model LM2903 of the comparator U2.
Present invention also offers it is a kind of it is reasonable in design, realize situation that is convenient, being capable of fast and effeciently detection voltage mutation,
The practical, voltage jump with good application value carries out detection method, it is characterised in that the method include with
Lower step：
Step one, detection circuit connection：At the sample point positive pole and voltage signal of the circuit for needing detection voltage to be mutated
The sample point cathode voltage input VIN+ connections of reason circuit, it would be desirable to the sample point negative pole of the circuit of detection voltage mutation and electricity
The sample point cathode voltage input VIN- connections of pressure signal processing circuit；
Step 2, voltage signal process：In needing the circuit course of work that detection voltage is mutated, voltage signal processing circuit
The sample point positive pole of circuit and the double-width grinding differential signal of cathode voltage to needing detection voltage to be mutated is amplified process
Afterwards, it is converted into single-ended voltage signal and exports to delay circuit to split-phase；
Step 3, voltage jump judge：When the normal circuit operation for needing detection voltage to be mutated, that is, need detection voltage
Voltage between the sample point positive pole of the circuit of mutation and negative pole is not undergone mutation, and the voltage of voltage signal processing circuit output is
One stable input voltage proportional to the differential input voltage of the instrumentation amplifier U1, voltage signal processing circuit output
Voltage be divided into two-way, all the way after the split-phase delays the first proportion resistor network partial pressure in circuit output to relatively more defeated
Go out the in-phase input end of comparator U2 in circuit, another road delays the second proportion resistor network point in circuit through the split-phase
The inverting input for comparing comparator U2 in output circuit is exported after pressure, due to resistance, the resistance of resistance R6, the electricity of resistance R5
The resistance of resistance R7 and the resistance of resistance R8 meet relational expressionTherefore the in-phase input end of comparator U2
Voltage is less than the voltage of its inverting input, and comparator U2 output low levels now, are judged as the voltage signal processing circuit
Input do not undergo mutation；
When disjunction failure occurs in the circuit for needing detection voltage to be mutated, the sample point of the circuit of detection voltage mutation is needed
Voltage between positive pole and negative pole is undergone mutation, and the voltage of voltage signal processing circuit output is also the voltage letter of a mutation
Number, the voltage of voltage signal processing circuit output is divided into two-way, delays the first ratio electricity in circuit through the split-phase all the way
The in-phase input end for comparing comparator U2 in output circuit is exported after resistance network partial pressure, another road delays electricity through the split-phase
The inverting input for comparing comparator U2 in output circuit is exported after the second proportion resistor network partial pressure in road, although resistance
The resistance of the resistance of R5, the resistance of resistance R6, the resistance of resistance R7 and resistance R8 meets relational expressionBut
Because electric capacity C1 has delayed the change of the voltage of output after the second proportion resistor network partial pressure so that the homophase of comparator U2
The voltage of input is more than the voltage of its inverting input, and comparator U2 output high level now, is judged as the voltage signal
The input voltage of process circuit there occurs mutation.
The present invention has compared with prior art advantages below：
1st, the circuit structure of voltage jump detection circuit of the present invention is simple, reasonable in design, realizes convenient and low cost.
2nd, compared with prior art, voltage jump of the invention detection circuit, need not both be programmed design, need not enter again
The complicated circuit parameter of row selects design, can reliably detect the voltage jump that inductance disjunction occurs in circuit.
3rd, voltage jump of the invention detection circuit, the parameter of circuit is delayed by changing split-phase, can be realized to voltage
The detection of mutation wide scope, it is applied widely.
4th, voltage jump of the invention detection circuit, by from suitable instrumentation amplifier, it becomes possible to in circuit
Voltage is sampled, and the circuit itself to being sampled disturbs less, readily available more accurate voltage jump testing result.
5th, voltage jump of the invention detection circuit, the instrumentation amplifier and comparator response speed of selection is very fast, energy
Voltage jump situation more than microsecond rank is enough detected, real-time detection effect is obvious.
6th, the method and step of voltage jump detection method of the present invention is simple, reasonable in design, and it is convenient to realize.
7th, the present invention can be applied in the middle of the various circuits for needing detection voltage to be mutated, and can coordinate corresponding protection electricity
Road, its is applied widely, practical, with good application value.
In sum, circuit structure of the present invention is simple, reasonable in design, realizes convenient and low cost, can be quickly and efficiently
The situation of detection voltage mutation, it is practical, it is applied widely, with good application value.
Below by drawings and Examples, technical scheme is described in further detail.
Description of the drawings
Fig. 1 is the schematic block circuit diagram that voltage jump of the present invention detects circuit.
Fig. 2 is the circuit theory diagrams that voltage jump of the present invention detects circuit.
Fig. 3 is the method flow block diagram of voltage jump detection method of the present invention.
Fig. 4 is the circuit theory being applied in the circuit and method of the voltage jump detection circuit of the present invention in inductive circuit
Figure.
Description of reference numerals:
1-voltage signal processing circuit；2-split-phase delays circuit；3-compare output circuit；
4-inductive circuit.
Specific embodiment
As shown in figure 1, the voltage jump detection circuit of the present invention, including the voltage signal processing circuit 1 being sequentially connected, divides
Mutually delay circuit 2 and compare output circuit 3, as shown in Fig. 2 the voltage signal processing circuit 1 includes instrumentation amplifier U1, electricity
Resistance R1, resistance R2, resistance R3, resistance R4, resistance R10 and Zener diode D1, one end of the resistance R1 is at voltage signal
The sample point cathode voltage input VIN- of reason circuit 1, one end of the resistance R3 is the sample point of voltage signal processing circuit 1
Cathode voltage input VIN+, the resistor voltage divider network connection that sample point cathode voltage is made up of the resistance R1 and resistance R2 that connect
To ground, the connection end of the resistance R1 and resistance R2 is connected with the inverting input of instrumentation amplifier U1, sample point cathode voltage
The resistor voltage divider network being made up of the resistance R3 and resistance R4 that connect be connected to ground, the connection end of the resistance R3 and resistance R4 with
The in-phase input end connection of instrumentation amplifier U1, between two gain resistor connection ends of the instrumentation amplifier U1 gain is connected to
Regulation resistance RG, the plus earth of the Zener diode D1, the negative electrode of the Zener diode D1 is with instrumentation amplifier U1's
Voltage Reference end connects, and the Voltage Reference end of the instrumentation amplifier U1 is also by the output of resistance R10 and externally fed power supply
End VCC connections；The split-phase delay circuit 2 include electric capacity C1, the first proportion resistor network being made up of resistance R5 and resistance R7,
And the second proportion resistor network being made up of resistance R6 and resistance R8；The resistance of the resistance R5, the resistance of resistance R6, resistance
The resistance of R7 and the resistance of resistance R8 meet relational expressionOne end of the resistance R5 and instrumentation amplifier
The outfan connection of U1, the other end of the resistance R5 is grounded by resistance R7, one end of the resistance R6 and instrumentation amplifier
The outfan connection of U1, the other end of the resistance R6 is grounded by resistance R8, one end and resistance R6 and the electricity of the electric capacity C1
The connection end connection of resistance R8, the other end ground connection of the electric capacity C1；The output circuit 3 that compares is including comparator U2 and resistance
R11, the in-phase input end of the comparator U2 is connected with the connection end of resistance R5 and resistance R7, and the comparator U2's is anti-phase defeated
Enter end to be connected with the connection end of resistance R6 and resistance R8, the outfan of the comparator U2 is the outfan for comparing output circuit 3
OUT and it is connected with the outfan VCC of externally fed power supply by resistance R11.When being embodied as, the electricity of the instrumentation amplifier U1
Source is connected with the outfan VCC of externally fed power supply, the earth terminal ground connection of the instrumentation amplifier U1；The comparator U2's
Power end is connected with the outfan VCC of externally fed power supply, the earth terminal ground connection of the comparator U2.The externally fed power supply
Outfan VCC output voltage be 5V.
In the present embodiment, as shown in Fig. 2 model AD623 of the instrumentation amplifier U1.The instrument of model AD623 is used
The pin 2 of amplifier U1 is inverting input, and pin 3 is in-phase input end, and pin 1 and pin 8 are two gain resistor connections
End, pin 5 is Voltage Reference end, and pin 4 is earth terminal, and pin 7 is power end, and pin 6 is outfan.
In the present embodiment, model 1N5222 of the Zener diode D1.
In the present embodiment, model LM2903 of the comparator U2.
As shown in figure 3, the voltage jump detection method of the present invention, comprises the following steps：
Step one, detection circuit connection：At the sample point positive pole and voltage signal of the circuit for needing detection voltage to be mutated
The sample point cathode voltage input VIN+ connections of reason circuit 1, it would be desirable to detect the sampling of the circuit of inductance disjunction voltage jump
Point negative pole is connected with the sample point cathode voltage input VIN- of voltage signal processing circuit 1；
Step 2, voltage signal process：In needing the circuit course of work that detection voltage is mutated, voltage signal processing circuit
1 pair needs the sample point positive pole of circuit that detection voltage is mutated to be amplified process with the double-width grinding differential signal of cathode voltage
Afterwards, it is converted into single-ended voltage signal and exports to delay circuit 2 to split-phase；
Step 3, voltage jump judge：When the normal circuit operation for needing detection voltage to be mutated, that is, need detection voltage
Voltage between the sample point positive pole of the circuit of mutation and negative pole is not undergone mutation, the voltage of the output of voltage signal processing circuit 1
It is a stable input voltage proportional to the differential input voltage of the instrumentation amplifier U1, voltage signal processing circuit 1
The voltage of output is divided into two-way, exports after the split-phase delays the first proportion resistor network partial pressure in circuit 2 arrive all the way
The in-phase input end of comparator U2 relatively in output circuit 3, another road delays the second ratio electricity in circuit 2 through the split-phase
The inverting input for comparing comparator U2 in output circuit 3 is exported after resistance network partial pressure, the resistance, resistance R6 due to resistance R5
The resistance of resistance, the resistance of resistance R7 and resistance R8 meet relational expressionTherefore comparator U2's is same
The voltage of phase input is less than the voltage of its inverting input, and comparator U2 output low levels now, are judged as the voltage letter
The input of number process circuit 1 is not undergone mutation；
When disjunction failure occurs in the circuit for needing detection voltage to be mutated, the sample point of the circuit of detection voltage mutation is needed
Voltage between positive pole and negative pole is undergone mutation, and the voltage of the output of voltage signal processing circuit 1 is also the voltage letter of a mutation
Number, the voltage of the output of voltage signal processing circuit 1 is divided into two-way, delays the first ratio in circuit 2 through the split-phase all the way
The in-phase input end for comparing comparator U2 in output circuit 3 is exported after resistor network partial pressure, another road is prolonged through the split-phase
The inverting input for comparing comparator U2 in output circuit 3 is exported after the second proportion resistor network partial pressure in slow circuit 2, though
So the resistance of the resistance of resistance R5, the resistance of resistance R6, the resistance of resistance R7 and resistance R8 meets relational expressionBut because electric capacity C1 has delayed the change of the voltage of output after the second proportion resistor network partial pressure
Change so that the voltage of the in-phase input end of comparator U2 is more than the voltage of its inverting input, comparator U2 exports high level, this
When, the input voltage for being judged as the voltage signal processing circuit 1 there occurs mutation.
By above detection method step can be seen that according to the output state of comparator U2 change just can determine that it is described
The input voltage mutation situation of voltage signal processing circuit 1.
For example, as shown in figure 4, the voltage jump detection circuit and method of the present invention are applied to into the voltage of inductive circuit 4
In abrupt climatic change, that is, the circuit that detection voltage is mutated is needed to be inductive circuit 4, the inductive circuit 4 is by direct voltage source Vi, electricity
Sense L1 and current-limiting resistance R0 concatenations are constituted, by the connecting line of the inductance L1 and current-limiting resistance R0 near one end of connection inductance L1
A point A be set to the sample point negative pole of the inductive circuit 4, by the connecting line of the inductance L1 and current-limiting resistance R0 near connection
The one point B of one end of current-limiting resistance R0 is set to the sample point positive pole of the inductive circuit 4, and by the sampling of the inductive circuit 4
Point negative pole is connected with the sample point cathode voltage input VIN- of voltage signal processing circuit 1, by the sampling of the inductive circuit 4
Point positive pole is connected with the sample point cathode voltage input VIN+ of voltage signal processing circuit 1；The voltage jump detects circuit
In, resistance R10 is used for current limliting；In order to reduce impact of the resistor voltage divider network to the inductive circuit 4, resistance R1, resistance are chosen
Resistance of the resistance of R2, resistance R3 and resistance R4 much larger than current-limiting resistance R0.
When 4 normal work of inductive circuit, the inductive circuit 4 tends to stable state, and the voltage of this time point A is equal to point B
Voltage, comparator U2 output low level, now, the input voltage for being judged as the voltage signal processing circuit 1 is dashed forward
Become；
When the inductive circuit 4 because disjunction failure causes the connecting line of the inductance L1 and current-limiting resistance R0 from positioned at point
When point C between A and point B disconnects, due to the presence of inductance L1, the loop current of the inductive circuit 4 will not be mutated, it will
Larger induced voltage is produced at point C, the voltage of this time point A is much larger than the voltage of point B, and comparator U2 exports high level, now,
The input voltage for being judged as the voltage signal processing circuit 1 there occurs mutation.
The above, is only presently preferred embodiments of the present invention, and not the present invention is imposed any restrictions, every according to the present invention
Any simple modification, change and equivalent structure change that technical spirit is made to above example, still fall within skill of the present invention
In the protection domain of art scheme.
Claims (5)
1. a kind of voltage jump detects circuit, it is characterised in that：Including the voltage signal processing circuit (1), the split-phase that are sequentially connected
Delay circuit (2) and compare output circuit (3), the voltage signal processing circuit (1) including instrumentation amplifier U1, resistance R1,
Resistance R2, resistance R3, resistance R4, resistance R10 and Zener diode D1, one end of the resistance R1 is voltage signal processing circuit
(1) one end of sample point cathode voltage input VIN-, the resistance R3 for voltage signal processing circuit (1) sample point just
Pole tension input VIN+, sample point cathode voltage is connected to by the resistor voltage divider network that the resistance R1 and resistance R2 that connect are constituted
Ground, the connection end of the resistance R1 and resistance R2 is connected with the inverting input of instrumentation amplifier U1, sample point cathode voltage by
The resistor voltage divider network that the resistance R3 and resistance R4 of series connection is constituted is connected to ground, connection end and the instrument of the resistance R3 and resistance R4
Connected with the in-phase input end of amplifier U1, gain tune is connected between two gain resistor connection ends of the instrumentation amplifier U1
Economize on electricity resistance RG, the plus earth of the Zener diode D1, the negative electrode of the Zener diode D1 and the electricity of instrumentation amplifier U1
Pressure reference edge connection, the Voltage Reference end of the instrumentation amplifier U1 is also by resistance R10 and the outfan of externally fed power supply
VCC connects；The split-phase delays circuit (2) including electric capacity C1, the first proportion resistor network being made up of resistance R5 and resistance R7,
And the second proportion resistor network being made up of resistance R6 and resistance R8；The resistance of the resistance R5, the resistance of resistance R6, resistance
The resistance of R7 and the resistance of resistance R8 meet relational expressionOne end of the resistance R5 and instrumentation amplifier
The outfan connection of U1, the other end of the resistance R5 is grounded by resistance R7, one end of the resistance R6 and instrumentation amplifier
The outfan connection of U1, the other end of the resistance R6 is grounded by resistance R8, one end and resistance R6 and the electricity of the electric capacity C1
The connection end connection of resistance R8, the other end ground connection of the electric capacity C1；The output circuit (3) that compares is including comparator U2 and resistance
R11, the in-phase input end of the comparator U2 is connected with the connection end of resistance R5 and resistance R7, and the comparator U2's is anti-phase defeated
Enter end to be connected with the connection end of resistance R6 and resistance R8, the outfan of the comparator U2 is the output for comparing output circuit (3)
Hold OUT and be connected with the outfan VCC of externally fed power supply by resistance R11.
2. according to the voltage jump detection circuit described in claim 1, it is characterised in that：The model of the instrumentation amplifier U1
AD623。
3. according to the voltage jump detection circuit described in claim 1, it is characterised in that：The model of the Zener diode D1
1N5222。
4. according to the voltage jump detection circuit described in claim 1, it is characterised in that：The model of the comparator U2
LM2903。
5. it is a kind of to detect the method that circuit is detected to voltage jump using as claimed in claim 1, it is characterised in that should
Method is comprised the following steps：
Step one, detection circuit connection：The sample point positive pole of the circuit for needing detection voltage to be mutated and voltage signal are processed into electricity
The sample point cathode voltage input VIN+ connections on road (1), it would be desirable to the sample point negative pole of the circuit of detection voltage mutation and electricity
The sample point cathode voltage input VIN- connections of pressure signal processing circuit (1)；
Step 2, voltage signal process：In needing the circuit course of work that detection voltage is mutated, voltage signal processing circuit (1)
The sample point positive pole of circuit and the double-width grinding differential signal of cathode voltage to needing detection voltage to be mutated is amplified process
Afterwards, it is converted into single-ended voltage signal and exports to delay circuit (2) to split-phase；
Step 3, voltage jump judge：When the normal circuit operation for needing detection voltage to be mutated, that is, detection voltage is needed to be mutated
Circuit sample point positive pole and negative pole between voltage do not undergo mutation, voltage signal processing circuit (1) output voltage be
One stable input voltage proportional to the differential input voltage of the instrumentation amplifier U1, voltage signal processing circuit (1)
The voltage of output is divided into two-way, exports after the split-phase delays the first proportion resistor network partial pressure in circuit (2) all the way
To the in-phase input end for comparing comparator U2 in output circuit (3), another road delays second in circuit (2) through the split-phase
Export to the inverting input for comparing comparator U2 in output circuit (3) after proportion resistor network partial pressure, due to the resistance of resistance R5
The resistance of value, the resistance of resistance R6, the resistance of resistance R7 and resistance R8 meets relational expressionTherefore compare
The voltage of the in-phase input end of device U2 is less than the voltage of its inverting input, and comparator U2 output low levels now, are judged as institute
The input for stating voltage signal processing circuit (1) is not undergone mutation；
When disjunction failure occurs in the circuit for needing detection voltage to be mutated, the sample point positive pole of the circuit of detection voltage mutation is needed
Voltage between negative pole is undergone mutation, and the voltage of voltage signal processing circuit (1) output is also the voltage signal of a mutation,
The voltage of voltage signal processing circuit (1) output is divided into two-way, delays the first ratio in circuit (2) through the split-phase all the way
To the in-phase input end for comparing comparator U2 in output circuit (3), another road is through the split-phase for output after resistor network partial pressure
Delay after the second proportion resistor network partial pressure in circuit (2) output to comparing the anti-phase defeated of comparator U2 in output circuit (3)
Enter end, although the resistance of the resistance of resistance R5, the resistance of resistance R6, the resistance of resistance R7 and resistance R8 meets relational expressionBut because electric capacity C1 has delayed the change of the voltage of output after the second proportion resistor network partial pressure
Change so that the voltage of the in-phase input end of comparator U2 is more than the voltage of its inverting input, comparator U2 exports high level, this
When, the input voltage for being judged as the voltage signal processing circuit (1) there occurs mutation.
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| CN201611256770.8A CN106680575B (en) | 2016-12-30 | 2016-12-30 | Voltage jump detection circuit and method |
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| CN201611256770.8A CN106680575B (en) | 2016-12-30 | 2016-12-30 | Voltage jump detection circuit and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108323221A (en) * | 2017-08-25 | 2018-07-24 | 深圳市云中飞网络科技有限公司 | Terminal device, battery component and battery protecting plate |
| CN109323775A (en) * | 2018-10-22 | 2019-02-12 | 安徽理工大学 | A kind of real-time acquisition system of numerically-controlled machine tool multi way temperature based on DSP |
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| US11171496B2 (en) | 2017-08-25 | 2021-11-09 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Electronic device, battery assembly and battery protection board |
| CN108323221B (en) * | 2017-08-25 | 2022-02-01 | Oppo广东移动通信有限公司 | Terminal device, battery pack and battery protection board |
| CN109323775A (en) * | 2018-10-22 | 2019-02-12 | 安徽理工大学 | A kind of real-time acquisition system of numerically-controlled machine tool multi way temperature based on DSP |
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| CN106680575B (en) | 2019-08-09 |
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