CN205080182U - Peak peak detection circuit - Google Patents
Peak peak detection circuit Download PDFInfo
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- CN205080182U CN205080182U CN201520876206.0U CN201520876206U CN205080182U CN 205080182 U CN205080182 U CN 205080182U CN 201520876206 U CN201520876206 U CN 201520876206U CN 205080182 U CN205080182 U CN 205080182U
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Abstract
The utility model discloses a peak peak detection circuit, add and the circuit including one -way peak detection circuit and reverse peak value. The utility model discloses a retrench circuit design, for traditional peak peak detection circuit, have the peak -to -peak value and detect accurate, simple, the reliable and stable characteristics of circuit structure, among the high circuit design of specially adapted integrated level, can use the problem that a slice integrated operational amplifier and peripheral cell solution peak -to -peak value detected.
Description
Technical field
The utility model belongs to basic electronic circuit field, is specifically related to a kind of peak-to-peak value testing circuit.
Background technology
Peak-to-peak value testing circuit is conventional basic electronic circuit, the voltage difference between the main maxima and minima detecting the AC signal of repetition period.In integrated circuit alternating message source table, integrated circuit dynamic parametric test circuit, peak-to-peak value testing circuit is all widely used.Accurately whether the design difficulty of peak-to-peak value testing circuit be to detect, and whether response is rapid, and whether circuit simplifies reliably.
Peak-to-peak value testing circuit of the prior art has several as follows, and one is based on peak detection circuit basis, adopts every straight network as prime, and two times of the peakvalue's checking result after isolated DC component are the peak-to-peak value of AC signal, as shown in Figure 1.AC signal input often has DC component, the block isolating circuit adopted in scheme can eliminate the impact of DC component, but block isolating circuit is generally made up of electric capacity and resistance, when input exchange signal is by block isolating circuit, need first to capacitor charging, often stabilization time is longer, causes detection speed slow; On the other hand, AC signal by having certain dividing potential drop, so final peak-to-peak value accuracy of detection has certain loss because of electric capacity and resistance after straight network.
Another kind of scheme, based on the different peak detection circuit of both direction, detects the same peak value and the valley that exchange input respectively, adds the detection with circuit realiration peak-to-peak value more afterwards by absolute value.This scheme is made up of three parts, although improve detection speed, employ multiple operational amplifier, circuit structure is more complicated, is often unfavorable for the integrated of circuit.In addition, structure is more complicated, and the progression of operational amplifier is more, often means the reduction of stability and reliability, maintainable decline in circuit design.
In order to solve, existing scheme stabilization time is longer, complex structure, integrated level are low, the problem of poor reliability, have invented a kind of new peak-to-peak value testing circuit.
Summary of the invention
The purpose of this utility model proposes a kind of peak-to-peak value testing circuit, do not adopting on the basis of block isolating circuit, have employed two-stage circuit and solve above problem.
To achieve these goals, the technical solution of the utility model is: a kind of peak-to-peak value testing circuit, comprise: unidirectional peak detection circuit 1: be connected with ac input end 3, the AC signal of described ac input end 3 is become the direct current signal representing peak value or valley; Reversed peak adds and circuit 2: two input is connected with described ac input end 3 with described unidirectional peak detection circuit 1 respectively, by the direct current signal that described unidirectional peak detection circuit exports, sum up with the AC signal of described ac input end, and the voltage difference retained between peak valley, direct current signal is delivered to output terminal 4, namely the absolute value of described output terminal 4 represents the peak-to-peak value of described ac input end AC signal.
Described reversed peak adds and comprises an adding circuit 24 with circuit 2, and two input ends of described adding circuit 24 are that described reversed peak adds and two of circuit 2 inputs, are connected respectively with the output of described unidirectional peak detection circuit 1 with described ac input end 3; The switching diode 23 of electric current one-way conduction effect has been connected with between the output of described adding circuit 24 and the negative input of operational amplifier 21, holding capacitor 22 of sampling is connected with between the negative input of described operational amplifier 21 and output, positive input is connected with current potential in analog, the output of described operational amplifier 21 is described output terminal 4, and is connected with the feedback end of described adding circuit 24.
Scheme further, described unidirectional peak detection circuit is for detecting the peak value of described ac input end 3 AC signal, and it exports and is connected to the negative input end of described adding circuit, and described ac input end 3 is connected to the positive input terminal of described adding circuit; Described switching diode 23 negative terminal connects described adding circuit 24, and anode connects the negative input of described operational amplifier 21.
Scheme further, described unidirectional peak detection circuit is for detecting the valley of described ac input end 3 AC signal, and it exports and is connected to the negative input end of described adding circuit, and described ac input end 3 is connected to the positive input terminal of described adding circuit; Described switching diode 23 anode connects described adding circuit 24, and negative terminal connects the negative input of described operational amplifier 21.
Scheme further, described unidirectional peak detection circuit is for detecting the peak value of described ac input end 3 AC signal, and it exports and is connected to the positive input terminal of described adding circuit, and described ac input end 3 is connected to the negative input end of described adding circuit; Described switching diode 23 anode connects described adding circuit 24, and negative terminal connects the negative input of described operational amplifier 21.
Scheme further, described unidirectional peak detection circuit is for detecting the valley of described ac input end 3 AC signal, and it exports and is connected to the positive input terminal of described adding circuit, and described ac input end 3 is connected to the negative input end of described adding circuit; Described switching diode 23 negative terminal connects described adding circuit 24, and anode connects the negative input of described operational amplifier 21.
Scheme further, be connected to resistance between the negative input of described switching diode 23 and described operational amplifier 21, play metering function.
Scheme further, described sampling holding capacitor 22 is parallel with resistance, for described operational amplifier 21 provides DC channel, avoids output saturation.
Scheme be further, described unidirectional peak detection circuit 1 comprises the first operational amplifier 14 and the second operational amplifier 11, the negative input termination ac input end 3 of described first amplifier, the output of described second operational amplifier 11 connects described reversed peak and adds and circuit 2; Had the switching diode 13 of electric current one-way conduction effect between the output of described first operational amplifier 14 and the negative input of the second operational amplifier 11, the positive input of described first operational amplifier 14 is connected with the output of the second operational amplifier 11; Holding capacitor 12 of sampling is had between the negative input and output of described second operational amplifier 11; The positive input of described second operational amplifier 11 connects current potential in analog.
The utility model have employed the scheme of two-stage circuit, solve the problem that peak-to-peak value detects, structure is simple, because at most only adopt four operational amplifiers, so four road operational amplifiers can be selected to coordinate peripheral circuit to complete, on the basis not reducing accuracy of detection and speed, be very beneficial for the integrated of circuit, and the stability of circuit increases.
Accompanying drawing explanation
Fig. 1 is a kind of peak-to-peak value testing circuit scheme in prior art;
Fig. 2 is another kind of peak-to-peak value testing circuit scheme in prior art;
Fig. 3 is the utility model circuit embodiments one;
Fig. 4 is the utility model circuit embodiments two;
Fig. 5 is the utility model circuit embodiments three;
Fig. 6 is the utility model circuit embodiments four;
Fig. 7 is a kind of unidirectional peak detection circuit embodiment one, for detection peak;
Fig. 8 is a kind of unidirectional peak detection circuit embodiment two, for detecting valley;
Fig. 9 is the simulation result adopting this programme to measure sinusoidal input peak-to-peak value.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
A kind of peak-to-peak value testing circuit, comprising: unidirectional peak detection circuit 1: be connected with ac input end 3, the AC signal of described ac input end 3 is become the direct current signal representing peak value or valley; Also comprise reversed peak to add and circuit 2: be connected with described ac input end 3 with described unidirectional peak detection circuit 1 respectively, by the direct current signal that described unidirectional peak detection circuit exports, sum up with the AC signal of described ac input end, and the voltage difference retained between peak valley, direct current signal is delivered to output terminal 4, namely the absolute value of described output terminal 4 represents the peak-to-peak value of described ac input end AC signal.
Reversed peak adds and circuit 2, comprises an adding circuit 24, and two input ends of described adding circuit 24 are that described reversed peak adds and two of circuit 2 inputs, export respectively be connected with described ac input end 3 with described unidirectional peak detection circuit 1; The switching diode 23 of electric current one-way conduction effect has been connected with between the output of described adding circuit 24 and operational amplifier 21, holding capacitor 22 of sampling is connected with between the negative input of described operational amplifier 21 and output, positive input is connected with current potential in analog, and the output of described operational amplifier 21 is described output terminal 4.
Have an operational amplifier in described adding circuit 24, its positive input is connected with the output of described operational amplifier 21, between be connected with feedback resistance, be also connected with the positive input of described adding circuit 24, between be connected with input resistance; Its negative input is connected with current potential in analog, between have and connect feedback resistance, be also connected with the negative input of described adding circuit 24, between be connected with input resistance.Usually two input resistances and two feedback resistances are chosen as same resistance.
Be connected to resistance between the negative input of described switching diode 23 and described operational amplifier 21, play metering function.Described sampling holding capacitor 22 is parallel with resistance, for described operational amplifier 21 provides DC channel, avoids output saturation.
Fig. 3 discloses the first reversed peak and adds the embodiment with circuit 2, described unidirectional peak detection circuit is for detecting the peak value of described ac input end 3 AC signal, export the negative input end being connected to described adding circuit, described ac input end 3 is connected to the positive input terminal of described adding circuit; Described switching diode 23 negative terminal connects described adding circuit 24, and anode connects the negative input of described operational amplifier 21.This embodiment can obtain a positive voltage at output terminal 4, and its value is the peak-to-peak value of described ac input end 3 AC signal.
Fig. 4 discloses the second reversed peak and adds the embodiment with circuit 2, described unidirectional peak detection circuit is for detecting the valley of described ac input end 3 AC signal, export the negative input end being connected to described adding circuit, described ac input end 3 is connected to the positive input terminal of described adding circuit; Described switching diode 23 anode connects described adding circuit 24, and negative terminal connects the negative input of described operational amplifier 21.This embodiment can obtain a negative voltage at output terminal 4, and the absolute value of its value is the peak-to-peak value of described ac input end 3 AC signal.
Fig. 5 discloses the third reversed peak and adds the embodiment with circuit 2, described unidirectional peak detection circuit is for detecting the peak value of described ac input end 3 AC signal, export the positive input terminal being connected to described adding circuit, described ac input end 3 is connected to the negative input end of described adding circuit; Described switching diode 23 anode connects described adding circuit 24, and negative terminal connects the negative input of described operational amplifier 21.This embodiment can obtain a negative voltage at output terminal 4, and the absolute value of its value is the peak-to-peak value of described ac input end 3 AC signal.
Fig. 6 discloses the 4th kind of reversed peak and adds the embodiment with circuit 2, described unidirectional peak detection circuit is for detecting the valley of described ac input end 3 AC signal, export the positive input terminal being connected to described adding circuit, described ac input end 3 is connected to the negative input end of described adding circuit; Described switching diode 23 negative terminal connects described adding circuit 24, and anode connects the negative input of described operational amplifier 21.This embodiment can obtain a positive voltage at output terminal 4, and its value is the peak-to-peak value of described ac input end 3 AC signal.
Unidirectional peak detection circuit 1, comprises the first operational amplifier 14 and the second operational amplifier 11, the negative input termination ac input end 3 of described first amplifier, and the output of described second operational amplifier 11 connects described reversed peak and adds and circuit 2; Had the switching diode 13 of electric current one-way conduction effect between the output of described first operational amplifier 14 and the negative input of the second operational amplifier 11, the positive input of described first operational amplifier 14 is connected with the output of the second operational amplifier 11; Holding capacitor 12 of sampling is had between the negative input and output of described second operational amplifier 11; The positive input of described second operational amplifier 11 connects current potential in analog.
Be connected to resistance between the negative input of described switching diode 13 and described second operational amplifier 11, play metering function.Described sampling holding capacitor 12 is parallel with resistance, for described second operational amplifier 11 provides DC channel, avoids output saturation.
Fig. 7 discloses a kind of unidirectional peak detection circuit 1, is peak detection circuit, and the negative terminal of described switching diode 13 connects the output of described first operational amplifier 14, the negative input of positive termination second operational amplifier 11.
Fig. 8 discloses a kind of unidirectional peak detection circuit 1, is valley value detection circuit, and the negative terminal of described switching diode 13 connects the output of described first operational amplifier 14, the negative input of positive termination second operational amplifier 11.
Fig. 9 carries out emulating the result obtained with reference to the circuit shown in Fig. 3, wherein has three curves, is respectively ac input end 3 curve, unidirectional peak detection circuit 1 curve of output, output terminal 4 curve.Can find out, the sine wave of input obtains a D. C. value after unidirectional peak detection circuit 1, and size equals the peak value of sine wave inputted, add through reversed peak with circuit 2 after obtain a D. C. value, size equals the peak-to-peak value of input sine wave.
Adopt circuit of the present utility model, be made up of two-stage circuit, this two-stage circuit has use four operational amplifiers altogether, can use the operational amplifier on four tunnels, can improve integrated level.The utility model is applied in sinusoidal wave peak-to-peak value testing circuit, obtains good effect.
Claims (8)
1. a peak-to-peak value testing circuit, comprising:
Unidirectional peak detection circuit (1): be connected with ac input end (3), becomes the AC signal of described ac input end (3) direct current signal representing peak value or valley;
Reversed peak adds and circuit (2): two input end is connected with described ac input end (3) with described unidirectional peak detection circuit (1) respectively, by the direct current signal that described unidirectional peak detection circuit exports, sum up with the AC signal of described ac input end, and the voltage difference retained between peak valley, direct current signal is delivered to output terminal (4), the absolute value of described output terminal (4) namely represents the peak-to-peak value of the AC signal of described ac input end;
It is characterized in that:
Described reversed peak adds and comprises an adding circuit (24) with circuit (2), two input ends of described adding circuit (24) are that described reversed peak adds two inputs with circuit (2), are connected respectively with the output of described unidirectional peak detection circuit (1) with described ac input end (3); The switching diode (23) of electric current one-way conduction effect has been connected with between the output of described adding circuit (24) and the negative input of operational amplifier (21), holding capacitor (22) of sampling is connected with between the negative input of described operational amplifier (21) and output, positive input is connected with current potential in analog, the output of described operational amplifier (21) is described output terminal (4), and is connected with the feedback end of described adding circuit (24).
2. a kind of peak-to-peak value testing circuit according to claim 1, it is characterized in that, described unidirectional peak detection circuit is for detecting the AC signal peak value of described ac input end (3), it exports the negative input end being connected to described adding circuit, and described ac input end (3) is connected to the positive input terminal of described adding circuit; Described switching diode (23) negative terminal connects described adding circuit (24), and anode connects the negative input of described operational amplifier (21).
3. a kind of peak-to-peak value testing circuit according to claim 1, it is characterized in that, described unidirectional peak detection circuit is for detecting the valley of described ac input end (3) AC signal, it exports the negative input end being connected to described adding circuit, and described ac input end (3) is connected to the positive input terminal of described adding circuit; Described switching diode (23) anode connects described adding circuit (24), and negative terminal connects the negative input of described operational amplifier (21).
4. a kind of peak-to-peak value testing circuit according to claim 1, it is characterized in that, described unidirectional peak detection circuit is for detecting the peak value of described ac input end (3) AC signal, it exports the positive input terminal being connected to described adding circuit, and described ac input end (3) is connected to the negative input end of described adding circuit; Described switching diode (23) anode connects described adding circuit (24), and negative terminal connects the negative input of described operational amplifier (21).
5. a kind of peak-to-peak value testing circuit according to claim 1, it is characterized in that, described unidirectional peak detection circuit is for detecting the valley of described ac input end (3) AC signal, it exports the positive input terminal being connected to described adding circuit, and described ac input end (3) is connected to the negative input end of described adding circuit; Described switching diode (23) negative terminal connects described adding circuit (24), and anode connects the negative input of described operational amplifier (21).
6. a kind of peak-to-peak value testing circuit as claimed in any of claims 2 to 5, is characterized in that, is connected to resistance, plays metering function between the negative input of described switching diode (23) and described operational amplifier (21).
7. a kind of peak-to-peak value testing circuit as claimed in any of claims 2 to 5, is characterized in that, described sampling holding capacitor (22) is parallel with resistance, for described operational amplifier (21) provides DC channel, avoids output saturation.
8. a kind of peak-to-peak value testing circuit according to claim 1, it is characterized in that, described unidirectional peak detection circuit (1) comprises the first operational amplifier (14) and the second operational amplifier (11), the negative input termination ac input end (3) of described first amplifier, the output of described second operational amplifier (11) connects described reversed peak and adds and circuit (2); Had the switching diode (13) of electric current one-way conduction effect between the output of described first operational amplifier (14) and the negative input of the second operational amplifier (11), the positive input of described first operational amplifier (14) is connected with the output of the second operational amplifier (11); Sampling holding capacitor (12) is had between the negative input and output of described second operational amplifier (11); The positive input of described second operational amplifier (11) connects current potential in analog.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520876206.0U CN205080182U (en) | 2015-11-02 | 2015-11-02 | Peak peak detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520876206.0U CN205080182U (en) | 2015-11-02 | 2015-11-02 | Peak peak detection circuit |
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| CN205080182U true CN205080182U (en) | 2016-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520876206.0U Expired - Fee Related CN205080182U (en) | 2015-11-02 | 2015-11-02 | Peak peak detection circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226621A (en) * | 2016-12-22 | 2018-06-29 | 上海普锐马电子有限公司 | A kind of high-precision peak-to-valley value sample circuit |
| CN109470908A (en) * | 2018-10-24 | 2019-03-15 | 深圳市芯茂微电子有限公司 | A kind of peak current detection method of no CS sampling resistor |
| CN109598258A (en) * | 2018-12-30 | 2019-04-09 | 苏州迈瑞微电子有限公司 | Ultrasound detection circuit and image sensor pixel circuit and signal detecting method |
| CN110530932A (en) * | 2019-10-16 | 2019-12-03 | 绍兴职业技术学院 | A kind of soil moisture sensor based on the detection of RC charge and discharge peak-to-peak value |
| CN110806503A (en) * | 2018-08-04 | 2020-02-18 | 张坚 | Novel peak value detection circuit |
-
2015
- 2015-11-02 CN CN201520876206.0U patent/CN205080182U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226621A (en) * | 2016-12-22 | 2018-06-29 | 上海普锐马电子有限公司 | A kind of high-precision peak-to-valley value sample circuit |
| CN110806503A (en) * | 2018-08-04 | 2020-02-18 | 张坚 | Novel peak value detection circuit |
| CN109470908A (en) * | 2018-10-24 | 2019-03-15 | 深圳市芯茂微电子有限公司 | A kind of peak current detection method of no CS sampling resistor |
| CN109470908B (en) * | 2018-10-24 | 2021-08-24 | 深圳市芯茂微电子有限公司 | Peak current detection method of CS-free sampling resistor |
| CN109598258A (en) * | 2018-12-30 | 2019-04-09 | 苏州迈瑞微电子有限公司 | Ultrasound detection circuit and image sensor pixel circuit and signal detecting method |
| CN109598258B (en) * | 2018-12-30 | 2024-01-30 | 苏州迈瑞微电子有限公司 | Ultrasonic detection circuit, image sensor pixel circuit and signal detection method |
| CN110530932A (en) * | 2019-10-16 | 2019-12-03 | 绍兴职业技术学院 | A kind of soil moisture sensor based on the detection of RC charge and discharge peak-to-peak value |
| CN110530932B (en) * | 2019-10-16 | 2024-05-10 | 绍兴职业技术学院 | Soil moisture sensor based on RC charge-discharge peak-to-peak detection |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160309 Termination date: 20161102 |