CN102324894B - Practical peak holding circuit - Google Patents
Practical peak holding circuit Download PDFInfo
- Publication number
- CN102324894B CN102324894B CN201110138093.0A CN201110138093A CN102324894B CN 102324894 B CN102324894 B CN 102324894B CN 201110138093 A CN201110138093 A CN 201110138093A CN 102324894 B CN102324894 B CN 102324894B
- Authority
- CN
- China
- Prior art keywords
- signal
- unit
- circuit
- input
- peak
- 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.)
- Active
Links
Images
Abstract
The invention discloses a practical peak holding circuit which mainly comprises four units, i.e., a comparison unit, a selection isolation unit, a peak holding unit and a gate control unit, wherein the comparison unit is used for generating and inputting a gate signal to be subjected to keeping signal synchronization, wherein the gate signal is used as an input signal of the gate control unit; the selection isolation unit is used for acquiring the input signal and preventing the accumulation of noise signals on a holding circuit and the isolation from a front end circuit; the peak holding unit takes a holding capacitor as a holding device and obtains an ideal diode through a negative feedback circuit composed of an operational amplifier and a diode so as to overcome a dead zone voltage and ensure the linear relation between a peak signal and the input signal while improving the sensibility; a digital processing circuit of the gate control unit forms two paths of control signals, wherein one path of control signal is output to the selection isolation unit to be used as a selection control signal of the selection isolation unit, and the other path of control signal is output to the peak holding unit to be used as a holding control signal of the peak holding unit, so that peak holding and releasing of the signal are realized.
Description
Technical field
The present invention relates to a kind of Practical peak holding circuit, relate in particular to the peak holding circuit that can normally use under a kind of high-noise environment.
Background technology
In general peak holding circuit, adopt amplifier to make follower, utilize diode unilateral conduction to carry out peak value maintenance to input signal.Electric capacity is as retainer member, and initial condition capacitance voltage equals zero; Retentive control pulse is discharged to the voltage on electric capacity by control simulation switching tube.Ideally, when input signal rises, by amplifier and diode pair, keep capacitor charging, until keep the voltage on electric capacity to equal input voltage; As long as follow-up input voltage is less than keeping voltage, diode is cut-off just, and capacitance voltage remains maximum input voltage, reaches the object that input signal peak value keeps.Yet, actual diode and ideal diode characteristic have larger gap, there is a dead band voltage in its forward characteristic, only have when the amplitude of input signal is greater than diode turn-on voltage, diode just can conducting, input signal could keep electric capacity to charge by diode pair, and this has just limited sensitivity and the linearity of processing of circuit small-signal.
In practical engineering application, it is very good many times the noise processed of input signal can not to be obtained, and causes occurring very large noise jamming when carrying out high speed, burst pulse, the maintenance of low amplitude signal.Comparator output pulse high level and low transition instantaneous, all can make to be held signal and be interfered, occur that the noise of spike and amplitude are very large.Because signal moment is dragged down, make to carry out normally inhibit signal of peak holding circuit after rising edge.The moment of reducing noise or overcoming appearance drags down or draws high and has great difficulty, and embodiment is complicated.Therefore in usual design all in the urgent need to a kind of simplicity of design, debugging is convenient, can also correctly keep a kind of peak holding circuit of peak value under high-noise environment.
Summary of the invention
Main purpose of the present invention is to provide a kind of Practical peak holding circuit, and it comprises comparing unit, selects isolated location, peak value holding unit and door control unit, wherein,
The output of described comparing unit is electrically connected to the input of described door control unit;
The output of described door control unit is as the control end of described selection isolated location;
The output while of described door control unit is as the control end of peak value holding unit;
The output of described selection isolated location is connected with the input of described peak value holding unit;
Input signal enters described comparing unit and described selection isolated location simultaneously;
Described selection isolated location, for obtaining input signal, prevent the accumulation of noise signal on described peak holding circuit and and the isolation of realization and front-end circuit;
When described input signal is greater than the threshold value of described comparator setting, described comparator out gate signal is to described door control unit;
Described door control unit, after receiving this gate signal, is converted to two path control signal by this gate signal;
Described door control unit Jiang Yi road control signal exports described selection isolated location to, as it, selects control signal, and whether control inputs signal can enter into described peak value holding unit by described selection isolated location;
Described door control unit exports another road control signal to described peak value holding unit, and as its retentive control signal, the switching of controlling maintained switch in described peak value holding unit realizes the peak value maintenance of signal and discharges.
During enforcement, described selection isolated location comprises isolation level and switching tube, and described isolation level is connected with described switching tube;
Input signal enters from the input of described selection isolated location, enters the input of described switching tube by the described isolation utmost point;
The described isolation utmost point, for isolating with front-end circuit, prevents the accumulation of noise signal in holding circuit.
During enforcement, the preferred metal-oxide-semiconductor of described switching tube.
During enforcement, described peak value holding unit comprises operational amplification circuit, and the first diode, the second diode, maintenance resistance, keep charging capacitor and switching tube, wherein,
The output of described operational amplification circuit is connected with an input of described operational amplification circuit by described the first diode, forms negative-feedback circuit; Described operational amplification circuit, as in-phase amplifier work, is input as on the occasion of making its conducting; Because the input void of described operational amplifier under deep negative feedback condition is short, guaranteed the linear relationship between peak signal and input signal;
The negative pole of described the first diode is connected with the source electrode of described switching tube by described maintenance resistance;
One end of described maintenance charging capacitor is connected between described maintenance resistance and the source electrode of described switching tube, the other end ground connection of described maintenance charging capacitor;
The negative pole of described the second diode is connected between the output and described the first diode of described operational amplification circuit, the plus earth of described the second diode;
Described maintenance resistance and maintenance charging capacitor coordinate adjusting retention time constant to guarantee the quality of inhibit signal;
This switching tube of retentive control signal controlling of described door control unit output keeps input signal or bleed off is controlled.
During enforcement, the preferred metal-oxide-semiconductor of switching tube that described peak value holding unit comprises.
During enforcement, described door control unit is integrated CPLD digital processing circuit or discrete single-shot trigger circuit.
Compared with prior art, Practical peak holding circuit of the present invention is mainly comprised of comparing unit, selection isolated location, peak value holding unit and four unit of door control unit, wherein, the function of described comparing unit is to produce and input and treat the gate signal that inhibit signal is synchronous, as the input signal of described door control unit; The function of described selection isolated location be realize to input signal obtain, prevent the accumulation of noise signal in holding circuit and and the isolation of front-end circuit; It is retainer member that described peak value holding unit utilization keeps electric capacity, utilizes amplifier and diode to form negative-feedback circuit and obtains ideal diode, overcomes dead band voltage, puies forward the highly sensitive linear relationship simultaneously having guaranteed between peak signal and input signal; The digital processing circuit formation two path control signal ，Yi road of described door control unit outputs to selects isolated location to select control signal as it, and another road outputs to peak value holding unit as its retentive control signal, and the peak value of realizing signal keeps and discharges.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of Practical peak holding circuit of the present invention;
Fig. 2 is the circuit theory diagrams of selection isolated location specific embodiment of the present invention
Fig. 3 is the circuit theory diagrams of peak value holding unit specific embodiment of the present invention;
Fig. 4-A is the sequential chart of input signal;
Fig. 4-B is the sequential chart of the gate signal of comparator output;
Fig. 4-C is the sequential chart that the control signal of selecting isolated location is controlled in door control unit output;
Fig. 4-D is the sequential chart that the control signal of peak value holding unit is controlled in door control unit output;
Fig. 4-E is the sequential chart of output signal after peak value keeps;
Embodiment
The invention provides the peak holding circuit that can normally use under a kind of high-noise environment.This peak holding circuit is comprised of comparing unit, selection isolated location, peak value holding unit and four unit of door control unit, wherein,
The function of described comparing unit is to produce and input and treat the gate signal that inhibit signal is synchronous, as the input signal of described door control unit;
The function of described selection isolated location be realize to input signal obtain, prevent the accumulation of noise signal in holding circuit and and the isolation of front-end circuit;
It is retainer member that described peak value holding unit utilization keeps electric capacity, utilizes amplifier and diode to form negative-feedback circuit and obtains ideal diode, overcomes dead band voltage, puies forward the highly sensitive linear relationship simultaneously having guaranteed between peak signal and input signal;
The digital processing circuit formation two path control signal ，Yi road of described door control unit outputs to selects isolated location to select control signal as it, and another road outputs to peak value holding unit as its retentive control signal, and the peak value of realizing signal keeps and discharges.
As shown in Figure 1, the structure chart of a specific embodiment of Practical peak holding circuit of the present invention, it comprises comparing unit Q1, selects isolated location Q2, peak value holding unit Q3 and door control unit Q4, wherein,
The output of comparing unit Q1 is electrically connected to the input of door control unit Q4;
The output of door control unit Q4 is as the control end of selecting isolated location Q2;
The output while of door control unit Q4 is as the control end of peak value holding unit Q3;
Select the output of isolated location Q2 to be connected with the input of peak value holding unit Q3;
When work, input signal enters comparing unit Q1 simultaneously and selects isolated location Q2;
The main body of comparing unit Q1 is a comparator, and when input signal is greater than comparator setting threshold value, comparator out gate signal is to door control unit Q4;
Select isolated location Q2 mainly to realize input signal obtained, prevents the accumulation of noise signal in holding circuit and and the isolation of previous circuit.
Fig. 2 is the circuit theory diagrams of selecting a specific embodiment of isolated location Q2, and described selection isolated location comprises input 21, isolation level 22, switching tube 23, control end 24 and output 25, and described isolation level 22 is connected with described switching tube 23;
Input signal enters from the input 21 of described selection isolated location Q2, enters the input of described switching tube 23 by the described isolation utmost point 22;
The described isolation utmost point 22, for isolating with front-end circuit, prevents the accumulation of noise signal in holding circuit.
Select the basic ideas of the control logic of isolated location Q2 to be: input signal enters the input S of switching tube 23 by the isolation utmost point 22 by input 21, the effect of the described isolation utmost point 22 is and front-end circuit isolation, prevents the accumulation of noise signal in holding circuit.The described preferred metal-oxide-semiconductor of switching tube 23 can certainly be other switch element.The turnover of the control end 24 control inputs signals of the control signal input switch pipe 23 that door control unit Q4 produces, peak holding circuit is after receiving first signal pulse, and cut-off switch pipe 23 immediately, enter peak value and keep the stage; Turn on-switch pipe 23 again after the peak value maintenance stage finishes, receives new input signal.
Fig. 3 is the circuit theory diagrams of a specific embodiment of peak value holding unit Q3, and described peak value holding unit Q3 comprises operational amplification circuit 31, and diode 32, diode 33 keep resistance 34, keep charging capacitor 35 and switching tube 36, wherein,
The output of described operational amplification circuit 31 is connected with an input of described operational amplification circuit 31 by described diode 32, forms negative-feedback circuit; Described operational amplification circuit 31, as in-phase amplifier work, is input as on the occasion of making its conducting; Because the input void of described operational amplifier under deep negative feedback condition is short, guaranteed the linear relationship between peak signal and input signal;
The negative pole of described diode 32 is connected with the source electrode of described switching tube 36 by described maintenance resistance;
One end of described maintenance charging capacitor 35 is connected between described maintenance resistance and the source electrode of described switching tube 36, the other end ground connection of described maintenance charging capacitor 35;
The negative pole of described diode 33 is connected between the output and described diode 32 of described operational amplification circuit 31, the plus earth of described diode 33;
Described maintenance resistance 34 and maintenance charging capacitor 35 coordinate adjusting retention time constants to guarantee the quality of inhibit signal;
This switching tube of retentive control signal controlling of described door control unit Q4 output keeps input signal or bleed off is controlled.
The same preferably metal-oxide-semiconductor of switching tube 36 here.In this unit, we utilize operational amplification circuit 31 and diode 32 to form negative-feedback circuit and obtain ideal diode, have overcome dead band voltage, have improved the sensitivity of circuit, and amplifier, as in-phase amplifier work, is input as on the occasion of making its conducting; Because amplifier input void under deep negative feedback condition is short, guaranteed the linear relationship between peak signal and input signal, the sensitivity that has also improved processing of circuit small-signal simultaneously.Effectively avoided the adding of diode 33 when input signal be that negative value or negative overshoot cause holding circuit to be output as negative situation.Keep resistance 34 and keep charging capacitor 35 to coordinate regulating retention time constant to guarantee the quality of inhibit signal.36 pairs of input signals of retentive control Signal-controlled switch pipe of door control unit Q4 output keep or bleed off is controlled.
The preferred integrated CPLD digital processing circuit of door control unit Q4 can certainly be discrete single-shot trigger circuit.This unit receives after gate signal, and can inner digital processing circuit forms two path control signal ，Yi road and outputs to selection isolated location Q2, as it, selects control signal, control Q2 input signal and by Q2, enter into peak value holding unit Q3; Another road outputs to peak value holding unit Q3, and as its retentive control signal, the switching of controlling maintained switch in Q3 realizes the peak value maintenance of signal and discharges.
Fig. 4-A, Fig. 4-B, Fig. 4-C, Fig. 4-D, Fig. 4-E are each groundwork point signal timing diagrams in peak holding circuit of the present invention, input signal in Fig. 4-A is greater than in comparing unit Q1 comparator while setting thresholding, comparator out gate signal pulse, to door control unit Q4, as shown in Fig. 4-B.
Door control unit Q4 is to selecting the control signal sequential of isolated location Q2 transmission as shown in Fig. 4-C.After signal pulse arrives, i.e. the rear edge of gate signal, control signal cut-off switch pipe 23 enters peak value and keeps the stage, and turn on-switch pipe 23 again after the peak value maintenance stage finishes, allows to receive new input signal pulse.
The control signal sequential that door control unit Q4 sends to peak value holding unit Q3 is as shown in Fig. 4-D, when input signal pulse arrives, it is the forward position of gate signal, closing switch pipe 36, peak value holding unit carries out peak value maintenance to input signal, when the retention time, arrive after the time of setting, control signal is opened switching tube 36, now the rapid bleed off of peak value holding unit.
Fig. 4-E is the sequential chart of the output signal after peak value keeps.
More than explanation is just illustrative for the purpose of the present invention; and nonrestrictive, those of ordinary skills understand, in the situation that do not depart from the spirit and scope that following claims limit; can make many modifications, variation or equivalence, but all will fall within the scope of protection of the present invention.
Claims (5)
1. a Practical peak holding circuit, is characterized in that, it comprises comparing unit, selects isolated location, peak value holding unit and door control unit, wherein,
The output of described comparing unit is electrically connected to the input of described door control unit;
The output of described door control unit is as the control end of described selection isolated location;
The output while of described door control unit is as the control end of peak value holding unit;
The output of described selection isolated location is connected with the input of described peak value holding unit;
Input signal enters described comparing unit and described selection isolated location simultaneously;
Described selection isolated location, for obtaining input signal, prevent the accumulation of noise signal on described peak holding circuit and and the isolation of realization and front-end circuit;
When described input signal is greater than the threshold value of described comparator setting, described comparator out gate signal is to described door control unit;
Described door control unit, after receiving this gate signal, is converted to two path control signal by this gate signal;
Described door control unit Jiang Yi road control signal exports described selection isolated location to, as it, selects control signal, and whether control inputs signal can enter into described peak value holding unit by described selection isolated location;
Described door control unit exports another road control signal to described peak value holding unit, and as its retentive control signal, the switching of controlling maintained switch in described peak value holding unit realizes the peak value maintenance of signal and discharges;
Wherein, described peak value holding unit comprises operational amplification circuit, and the first diode, the second diode, maintenance resistance, keep charging capacitor and switching tube, wherein,
The output of described operational amplification circuit is connected with an input of described operational amplification circuit by described the first diode, forms negative-feedback circuit; Described operational amplification circuit, as in-phase amplifier work, is input as on the occasion of making its conducting; Because the input void of described operational amplifier under deep negative feedback condition is short, guaranteed the linear relationship between peak signal and input signal;
The negative pole of described the first diode is connected with the source electrode of described switching tube by described maintenance resistance;
One end of described maintenance charging capacitor is connected between described maintenance resistance and the source electrode of described switching tube, the other end ground connection of described maintenance charging capacitor;
The negative pole of described the second diode is connected between the output and described the first diode of described operational amplification circuit, the plus earth of described the second diode;
Described maintenance resistance and maintenance charging capacitor coordinate adjusting retention time constant to guarantee the quality of inhibit signal;
This switching tube of retentive control signal controlling of described door control unit output keeps input signal or bleed off is controlled.
2. Practical peak holding circuit as claimed in claim 1, is characterized in that,
Described selection isolated location comprises isolation level and switching tube, and described isolation level is connected with described switching tube;
Input signal enters from the input of described selection isolated location, enters the input of described switching tube by the described isolation utmost point;
The described isolation utmost point, for isolating with front-end circuit, prevents the accumulation of noise signal in holding circuit.
3. Practical peak holding circuit as claimed in claim 2, is characterized in that, the preferred metal-oxide-semiconductor of described switching tube.
4. Practical peak holding circuit as claimed in claim 1, is characterized in that, the preferred metal-oxide-semiconductor of switching tube that described peak value holding unit comprises.
5. Practical peak holding circuit as claimed in claim 1, is characterized in that, described door control unit is integrated CPLD digital processing circuit or discrete single-shot trigger circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110138093.0A CN102324894B (en) | 2011-05-26 | 2011-05-26 | Practical peak holding circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110138093.0A CN102324894B (en) | 2011-05-26 | 2011-05-26 | Practical peak holding circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102324894A CN102324894A (en) | 2012-01-18 |
| CN102324894B true CN102324894B (en) | 2014-02-12 |
Family
ID=45452577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110138093.0A Active CN102324894B (en) | 2011-05-26 | 2011-05-26 | Practical peak holding circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102324894B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI467183B (en) * | 2013-03-14 | 2015-01-01 | Univ China Sci & Tech | Hardware retention system and method of embedded handheld oscilloscope |
| CN107255808A (en) * | 2017-07-13 | 2017-10-17 | 西安理工大学 | A kind of narrow pulse peak energy monitor of laser radar outgoing |
| CN108734905B (en) * | 2018-06-30 | 2023-09-15 | 深圳市朗强科技有限公司 | Low-power doorbell |
| CN110874161A (en) * | 2019-11-19 | 2020-03-10 | 深圳市拓思迪科技有限公司 | Infrared touch screen parallel scanning system capable of continuously maintaining peak value |
| CN113824470A (en) * | 2021-09-26 | 2021-12-21 | 海南宝通实业公司 | Method and device for improving frequency hopping receiving voice quality |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615432A (en) * | 2009-07-29 | 2009-12-30 | 杭州士兰微电子股份有限公司 | Peak sampling hold circuit, peak sampling hold method and application |
| CN101771385A (en) * | 2008-12-30 | 2010-07-07 | 北京富纳特创新科技有限公司 | Power amplification circuit and thermally induced sound-producing device with power amplification circuit |
-
2011
- 2011-05-26 CN CN201110138093.0A patent/CN102324894B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101771385A (en) * | 2008-12-30 | 2010-07-07 | 北京富纳特创新科技有限公司 | Power amplification circuit and thermally induced sound-producing device with power amplification circuit |
| CN101615432A (en) * | 2009-07-29 | 2009-12-30 | 杭州士兰微电子股份有限公司 | Peak sampling hold circuit, peak sampling hold method and application |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102324894A (en) | 2012-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102324894B (en) | Practical peak holding circuit | |
| US9985163B2 (en) | Single photon avalanche diode having pulse shaping filter | |
| WO2019217392A3 (en) | Devices, methods, and graphical user interfaces for interaction with an intensity-sensitive input region | |
| US20140063593A1 (en) | Capacitor discharge pulse drive circuit with fast recovery | |
| MY175090A (en) | Electronic device and power adapter, including main control circuit, thereof | |
| CN204885822U (en) | Semiconductor laser drive circuit reaches semiconductor laser including this circuit | |
| CN104333358A (en) | High-speed clock-controlled comparator | |
| CN103066989A (en) | Single power electric level shift circuit with digital filtering function | |
| CN104753477A (en) | Power amplifier and gain switching circuit thereof | |
| CN100571034C (en) | Pulse fast edge conversion device | |
| CN203747395U (en) | Temperature protection circuit applied to LED current ripple eliminating circuit | |
| CN202068379U (en) | Practical peak holding circuit | |
| CN204392195U (en) | Variable gain band leads to amplifying circuit | |
| CN207396767U (en) | Infrared tube detection device and system | |
| CN107450105A (en) | Infrared tube detection means and system | |
| CN104218909B (en) | A kind of quickly low overhead peak detection circuit | |
| CN104539150A (en) | Drain electrode modulator circuit with slow start function | |
| CN204334320U (en) | A kind of drain modulation circuit with slow turn-on function | |
| CN104242970A (en) | Automatic gain reduction control circuit for multi-channel intermediate-frequency pulses | |
| CN203800836U (en) | CS short circuit protection circuit for switch power supply | |
| CN203851125U (en) | TTL electric level signal to difference electric level signal amplification circuit | |
| CN103490750B (en) | A kind of based on producing circuit with the ultrafast pulse of door at a high speed | |
| GB2575592A (en) | Control of switches in a variable impedance element | |
| CN204068950U (en) | A kind of multichannel medium-frequency pulse automatic gain attenuation control circuit | |
| CN106941358B (en) | A kind of infrared radiation receiving circuit with fast charge mode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |