CN101498747A - Wave crest and wave trough detection method and circuit - Google Patents
Wave crest and wave trough detection method and circuit Download PDFInfo
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- CN101498747A CN101498747A CNA2008101480034A CN200810148003A CN101498747A CN 101498747 A CN101498747 A CN 101498747A CN A2008101480034 A CNA2008101480034 A CN A2008101480034A CN 200810148003 A CN200810148003 A CN 200810148003A CN 101498747 A CN101498747 A CN 101498747A
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Abstract
The invention discloses a wave crest and wave trough detection method and a circuit. A detected waveform is simultaneously delivered to the positive end of a voltage comparator and the input end of a waveform delayer; the detected waveform is delayed for a certain time by the waveform delayer to form a delayed waveform; the delayed waveform is delivered to the negative end of the voltage comparator; the voltage comparator compares the detected waveform and the delayed waveform and outputs a wave crest and wave trough detection result pulse; the descending edge of the pulse corresponds to the wave crest of the detected waveform; and the ascending edge of the pulse corresponds to the wave trough of the detected waveform. The invention has simple structure, can detect all wave crests and wave troughs of the detected waveform without complex differential, operation, a switching capacity or a reset circuit, can be used for detecting any waveforms and can detect wave crest information except wave trough information; the waveform delayer formed by a high-performance operational amplifier can accurately delay the detected waveform; and the high-performance voltage comparator can accurately detect the wave crest and wave trough information under the condition that the delay time is as short as possible so as to minimize the error.
Description
Technical field
The present invention relates to integrated circuit fields, particularly a kind of Wave crest and wave trough detection method and circuit.
Background technology
Valley detection is widely used in the quasi-resonant switching transducer, the quasi-resonant switching transducer detects voltage or current signal on institute's power controlling switch, conducting of trough place or Closing Switch at this voltage or current signal, promptly so-called " soft switch technique ", this technology can greatly reduce switching loss.
Prior art adopts detected waveform single order differential, again to institute's value behind the differential (ξ, 0 ,-detect (0＜ξ＜0.1) in ξ) interval, the complicated differentiating circuit of this Technology Need, switch sampling keep capacitance network, reset circuit, computing circuit.Sort circuit is complex structure not only, and switched capacitor network is also more easily introduced error when high frequency.
Summary of the invention
The purpose of this invention is to provide a kind of Wave crest and wave trough detection method and circuit, not only can accurately realize the valley detection function in " soft switch technique " reliably, can also detect crest.
Technical scheme of the present invention is as follows:
A kind of Wave crest and wave trough detection method, it is characterized in that: at first detected waveform is postponed to handle, then the detected waveform after detected waveform and the delay is compared and draw the detection pulse, the corresponding detected waveform crest of described pulse negative edge, the corresponding detected waveform trough of rising pulse.
The Wave crest and wave trough testing circuit that a kind of Wave crest and wave trough detection method adopted, it is characterized in that: form by waveform delay device and voltage comparator, described waveform delay device and voltage comparator include input end and output terminal, and the output terminal of waveform delay device is connected with the voltage comparator input end.
Described voltage comparator comprises two input ends, an anode and a negative terminal.
The input end of described waveform delay device and the anode of voltage comparator insert detected waveform simultaneously, and the output terminal of described waveform delay device is connected with the negative terminal of voltage comparator.
Described waveform delay device is made up of amplifier and electric capacity, the external output capacitance of the output terminal of amplifier, described output capacitance ground connection.
The input anode of described amplifier is a waveform delay device input end, and the output terminal of amplifier is a waveform delay device output terminal.The amplifier of positive unity gain makes output signal follow input signal fully in this structure, and gain is 1, and output capacitance makes output signal produce a certain amount of delay with respect to input signal.
The course of work of described Wave crest and wave trough testing circuit:
Detected waveform 1 is delivered to voltage comparator anode and waveform delay device input end simultaneously, the waveform delay device carries out waveform 1 obtaining waveform 2 after the delay of certain hour, waveform 2 is delivered to the voltage comparator negative terminal, voltage comparator comparison waveform 1, waveform 2 are also exported the pulse of Wave crest and wave trough testing result, the corresponding detected waveform crest of described pulse negative edge, the corresponding detected waveform trough of rising pulse.
Beneficial effect of the present invention is as follows:
Circuit structure of the present invention is simple, need not complicated differential, computing, switching capacity, reset circuit, just can detect all troughs of detected waveform; Can be used for detecting random waveform, can also detect crest information except that trough information; Waveform delay device by the high-performance amplifier constitutes can accurately postpone detected waveform; The high-performance voltage comparator can be so that still can accurately detect trough information, minimum error in time delay under the as far as possible little situation.
Description of drawings
Fig. 1 is a principle assumption diagram of the present invention
Embodiment
As shown in Figure 1, a kind of Wave crest and wave trough detection method at first postpones detected waveform to handle, and the detected waveform after detected waveform and the delay is compared draw the detection pulse then, the corresponding detected waveform crest of described pulse negative edge, the corresponding detected waveform trough of rising pulse.
The Wave crest and wave trough testing circuit that a kind of Wave crest and wave trough detection method adopted, form by waveform delay device and voltage comparator, described waveform delay device and voltage comparator include input end and output terminal, and the output terminal of waveform delay device is connected with the voltage comparator input end.
Described voltage comparator comprises two input ends, an anode and a negative terminal.
The input end of described waveform delay device and the anode of voltage comparator insert detected waveform simultaneously, and the output terminal of described waveform delay device is connected with the negative terminal of voltage comparator.
Described waveform delay device is made up of amplifier and electric capacity, the external output capacitance of the output terminal of amplifier, described output capacitance ground connection.
The input anode of described amplifier is a waveform delay device input end, and the output terminal of amplifier is a waveform delay device output terminal.The amplifier of positive unity gain makes output signal follow input signal fully in this structure, and gain is 1, and output capacitance makes output signal produce a certain amount of delay with respect to input signal.
The course of work of described Wave crest and wave trough testing circuit:
Detected waveform 1 is delivered to voltage comparator anode and waveform delay device input end simultaneously, the waveform delay device carries out waveform 1 obtaining waveform 2 after the delay of certain hour, waveform 2 is delivered to the voltage comparator negative terminal, voltage comparator comparison waveform 1, waveform 2 are also exported the pulse of Wave crest and wave trough testing result, the corresponding detected waveform crest of described pulse negative edge, the corresponding detected waveform trough of rising pulse.
Sum up the overall work process:
1, the fine delay that detected waveform 1 is carried out Δ t obtains waveform 2;
2, with waveform 1, waveform 2 is sent into the positive and negative end of voltage comparator respectively, the pulse of comparer output Wave crest and wave trough testing result, and wherein rising edge is a trough, negative edge is a crest.
Claims (7)
1, a kind of Wave crest and wave trough detection method, it is characterized in that: at first detected waveform is postponed to handle, then the detected waveform after detected waveform and the delay is compared and draw the detection pulse, the corresponding detected waveform crest of described pulse negative edge, the corresponding detected waveform trough of rising pulse.
2, the Wave crest and wave trough testing circuit that a kind of Wave crest and wave trough detection method adopted, it is characterized in that: form by waveform delay device and voltage comparator, described waveform delay device and voltage comparator include input end and output terminal, and the output terminal of waveform delay device is connected with the voltage comparator input end.
3, according to the described a kind of Wave crest and wave trough testing circuit of claim 2, it is characterized in that: described voltage comparator comprises two input ends, an anode and a negative terminal.
4, according to the described a kind of Wave crest and wave trough testing circuit of claim 3, it is characterized in that: the input end of described waveform delay device and the anode of voltage comparator insert detected waveform simultaneously, and the output terminal of described waveform delay device is connected with the negative terminal of voltage comparator.
5, according to the described a kind of Wave crest and wave trough testing circuit of claim 4, it is characterized in that: described waveform delay device is made up of amplifier and electric capacity, the external output capacitance of the output terminal of amplifier, described output capacitance ground connection.
6, according to the described a kind of Wave crest and wave trough testing circuit of claim 5, it is characterized in that: the input anode of described amplifier is a waveform delay device input end, and the output terminal of amplifier is a waveform delay device output terminal.
7, according to claim 3 or 6 described a kind of Wave crest and wave trough testing circuits, it is characterized in that the course of work is: detected waveform 1 is delivered to voltage comparator anode and waveform delay device input end simultaneously, the waveform delay device carries out waveform 1 obtaining waveform 2 after the delay of certain hour, waveform 2 is delivered to the voltage comparator negative terminal, voltage comparator comparison waveform 1, waveform 2 are also exported the pulse of Wave crest and wave trough testing result, the corresponding detected waveform crest of described pulse negative edge, the corresponding detected waveform trough of rising pulse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101480034A CN101498747A (en) | 2008-12-25 | 2008-12-25 | Wave crest and wave trough detection method and circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101480034A CN101498747A (en) | 2008-12-25 | 2008-12-25 | Wave crest and wave trough detection method and circuit |
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| CN101498747A true CN101498747A (en) | 2009-08-05 |
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| CNA2008101480034A Pending CN101498747A (en) | 2008-12-25 | 2008-12-25 | Wave crest and wave trough detection method and circuit |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082521A (en) * | 2010-10-29 | 2011-06-01 | 西安英洛华微电子有限公司 | Circuit for accurately detecting resonance trough |
| CN102185466A (en) * | 2011-05-24 | 2011-09-14 | 杭州矽力杰半导体技术有限公司 | Driving circuit and driving method applied to flyback-type converter and quasi-resonant soft-switching flyback-type converter applying same |
| CN103675425A (en) * | 2012-09-18 | 2014-03-26 | 张翌 | Self-adaptive quasi-resonance valley detection circuit of flyback switching power supply |
| TWI502873B (en) * | 2014-07-01 | 2015-10-01 | Univ Nat Taiwan | Control circuit |
| CN105975091A (en) * | 2016-07-05 | 2016-09-28 | 南京理工大学 | Virtual keyboard human-computer interaction technology based on inertial sensor |
| CN109633236A (en) * | 2018-12-13 | 2019-04-16 | 成都精位科技有限公司 | Automatic Communication Signals Recognition and device |
| CN111623958A (en) * | 2020-05-18 | 2020-09-04 | 长春欧意光电技术有限公司 | Wavelet peak-peak value extraction method in interference signal |
| CN113419102A (en) * | 2021-06-26 | 2021-09-21 | 广州金升阳科技有限公司 | Wave crest detection circuit and application thereof |
-
2008
- 2008-12-25 CN CNA2008101480034A patent/CN101498747A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082521A (en) * | 2010-10-29 | 2011-06-01 | 西安英洛华微电子有限公司 | Circuit for accurately detecting resonance trough |
| CN102082521B (en) * | 2010-10-29 | 2013-01-09 | 西安英洛华微电子有限公司 | Circuit for accurately detecting resonance trough |
| CN102185466A (en) * | 2011-05-24 | 2011-09-14 | 杭州矽力杰半导体技术有限公司 | Driving circuit and driving method applied to flyback-type converter and quasi-resonant soft-switching flyback-type converter applying same |
| CN103675425B (en) * | 2012-09-18 | 2017-05-03 | 上海占空比电子科技有限公司 | Self-adaptive quasi-resonance valley detection circuit of flyback switching power supply |
| CN103675425A (en) * | 2012-09-18 | 2014-03-26 | 张翌 | Self-adaptive quasi-resonance valley detection circuit of flyback switching power supply |
| TWI502873B (en) * | 2014-07-01 | 2015-10-01 | Univ Nat Taiwan | Control circuit |
| CN105975091A (en) * | 2016-07-05 | 2016-09-28 | 南京理工大学 | Virtual keyboard human-computer interaction technology based on inertial sensor |
| CN109633236A (en) * | 2018-12-13 | 2019-04-16 | 成都精位科技有限公司 | Automatic Communication Signals Recognition and device |
| CN109633236B (en) * | 2018-12-13 | 2021-06-22 | 成都精位科技有限公司 | Radio signal identification method and device |
| CN111623958A (en) * | 2020-05-18 | 2020-09-04 | 长春欧意光电技术有限公司 | Wavelet peak-peak value extraction method in interference signal |
| CN111623958B (en) * | 2020-05-18 | 2021-11-12 | 长春欧意光电技术有限公司 | Wavelet peak-peak value extraction method in interference signal |
| CN113419102A (en) * | 2021-06-26 | 2021-09-21 | 广州金升阳科技有限公司 | Wave crest detection circuit and application thereof |
| CN113419102B (en) * | 2021-06-26 | 2022-09-13 | 广州金升阳科技有限公司 | Wave crest detection circuit and application thereof |
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Open date: 20090805 |