CN204613276U - A kind of peak-detector circuit - Google Patents
A kind of peak-detector circuit Download PDFInfo
- Publication number
- CN204613276U CN204613276U CN201520323156.3U CN201520323156U CN204613276U CN 204613276 U CN204613276 U CN 204613276U CN 201520323156 U CN201520323156 U CN 201520323156U CN 204613276 U CN204613276 U CN 204613276U
- Authority
- CN
- China
- Prior art keywords
- diode
- electric capacity
- resistance
- peak
- pin
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a kind of peak-detector circuit, comprise the second electric capacity C2, the 3rd electric capacity C3, the 3rd diode D3, the 4th diode D4, the second resistance R2, the 3rd resistance R3, the 4th resistance R4 and operational amplifier; The utility model, while bandwidth frequency response, completes the linearization of peak detection constrained input signal peak, has the advantages such as working band is wide, fast response time simultaneously; This wave detector can reduce power consumption, working band is wide, the good and circuit stability of the linearity, can the peak value of reaction signal very accurately after data processing does fitting correction; The utility model can be widely used in various communication system.
Description
Technical field
The utility model relates to a kind of circuit, is specifically related to a kind of peak-detector circuit.
Background technology
In the field of communications, peak-detector circuit is a vital part.In whole communication system, it can the size of real time detection signal, thus the gain of adjustment System modules, avoid gain saturation and large-signal to unfavorable factors such as signalling channels.Therefore, the linearity of peak detection, directly affects the overall performance of communication system.But the linearization of peak-detector circuit is an important and difficult issues in general design, be also easy to be left in the basket simultaneously.
Traditional peak-detector circuit as shown in Figure 1, due to the restriction of operational amplifier bandwidth, and when frequency response non-linear makes this circuit there is high frequency, measures inaccurate problem during small-signal.
Therefore, need a kind of low-power consumption, good stability, the linearity high, can the peak-detector circuit of widespread use.
Utility model content
In order to overcome the shortcoming of existing peak-detector circuit closed loop configuration Bandwidth-Constrained, low-response and nonlinear response, the utility model proposes one utilizes correcting circuit to correct, make itself and input signal peak value linear proportional example relevant, also have that working band is wide, a kind of peak-detector circuit of fast response time, the plurality of advantages such as low in energy consumption.
The technical scheme that the utility model adopts is: a kind of peak-detector circuit, comprises the second electric capacity C2, the 3rd electric capacity C3, the 3rd diode D3, the 4th diode D4, the second resistance R2, the 3rd resistance R3, the 4th resistance R4 and operational amplifier; The one termination signal input part of the second described electric capacity C2,3 ends of operational amplifier are connect after the other end of the second electric capacity C2 is connected with the 3rd diode D3, the DC voltage of the second described resistance R2 mono-termination 12V, ground connection after the second resistance R2 other end is connected with the 4th diode D4; First node is provided with between the second described electric capacity C2 and the 3rd diode D3, Section Point is provided with between second resistance R2 and the 4th diode D4, the 3rd resistance R3 is connected between described first node and Section Point, the 3rd described electric capacity C3 and one end ground connection of the 4th resistance R4,3 ends of another termination operational amplifier; Described operational amplifier 1 end, 5 ends, 8 end skies connect, 4 termination-12V voltages, 7 termination+12V voltages, and 2 pin are reverse input end, 6 pin are output terminal, and 2 described pin are connected with 6 pin.
Preferably, the 3rd described electric capacity C3 adopts electric leakage few, the thin-film capacitor that precision is high.
Preferably, the 3rd described electric capacity C3 adopts polyphenyl electric capacity.
Preferably, described operational amplifier adopts model to be the operational amplifier of OPA228.
Preferably, the 3rd described diode D3, the 4th diode D4 adopt the diode that specification is identical.
Preferably, the 3rd described diode D3, the 4th diode D4 adopt model to be the diode of 1N4148.
The beneficial effects of the utility model are: a kind of peak-detector circuit bandwidth frequency responds while, can complete the linearization of peak detection constrained input signal peak, has the advantages such as working band is wide, fast response time simultaneously; This wave detector can reduce power consumption, working band is wide, the good and circuit stability of the linearity, can the peak value of reaction signal very accurately after data processing does fitting correction.Therefore can be widely used in various communication system.
Accompanying drawing explanation
Fig. 1 is traditional peak-detector circuit;
Fig. 2 circuit diagram of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
As Fig. 2, the technical scheme that the utility model adopts is: a kind of peak-detector circuit, comprises the second electric capacity C2, the 3rd electric capacity C3, the 3rd diode D3, the 4th diode D4, the second resistance R2, the 3rd resistance R3, the 4th resistance R4 and operational amplifier; The one termination signal input part of the second described electric capacity C2,3 ends of operational amplifier are connect after the other end of the second electric capacity C2 is connected with the 3rd diode D3, the DC voltage of the second described resistance R2 mono-termination 12V, ground connection after the second resistance R2 other end is connected with the 4th diode D4; First node is provided with between the second described electric capacity C2 and the 3rd diode D3, Section Point is provided with between second resistance R2 and the 4th diode D4, the 3rd resistance R3 is connected between described first node and Section Point, the 3rd described electric capacity C3 and one end ground connection of the 4th resistance R4,3 ends of another termination operational amplifier; Described operational amplifier 1 end, 5 ends, 8 end skies connect, 4 termination-12V voltages, 7 termination+12V voltages, and 2 pin are reverse input end, 6 pin are output terminal, and 2 described pin are connected with 6 pin.
The 3rd described electric capacity C3 adopts electric leakage few, the thin-film capacitor that precision is high.
The 3rd described electric capacity C3 adopts polyphenyl electric capacity.
Described operational amplifier adopts model to be the operational amplifier of OPA228.
The 3rd described diode D3, the 4th diode D4 adopt the diode that specification is identical.
The 3rd described diode D3, the 4th diode D4 adopt model to be the diode of 1N4148.
During work, input signal through the second electric capacity C2 isolated DC component, by the AC compounent of signal, the effective so intrinsic biased impact on peakvalue's checking avoiding signal.After this other end of the second electric capacity C2 is connected with the 3rd diode D3,3rd diode D3 one-way conduction detects the peak value of signal, but because the forward voltage of the 3rd diode D3 makes peak value reduce a fixed value, the other end of the 3rd diode D3 is connected with the 3rd electric capacity C3 and remains on above the 3rd electric capacity C3 by the peak value detected, in order to improve precision, 3rd electric capacity C3 should adopt electric leakage few, the thin-film capacitor that precision is high, such as polyphenyl electric capacity etc.The DC voltage of 12V is by being connected to ground with the second resistance R2 and the 4th diode D4 simultaneously, wherein the 4th diode D4 adopts and the identical diode of the 3rd diode D3 specification, on the 4th diode D4, the decay of voltage is substantially identical with the decay of voltage on the 3rd diode D3 like this, voltage regulation three resistance R3 on 4th diode D4 charges to the second electric capacity C2, and the voltage of node that now the second electric capacity C2 is connected with the 3rd diode D3 also equals the voltage difference on the 4th diode D4.The 3rd electric capacity C3 according to circuit ultimate principle (superposition principle), just can compensate the decay due to voltage on the 3rd diode D3, so accurately can reflect the peak value of AC signal.3rd electric capacity C3 is in parallel with the 4th resistance R4 forms impulse electricity loop, by arranging different resistances, different time constants can be set to adapt to the occasion of various speed, the occasions such as this external film size characteristic display frequently can arrange analog switch at the charge circuit of electric capacity and discharge loop and realize instantaneous charging and instantaneously to discharge over the ground, further can improve the response speed of circuit like this.The peak value of input signal is deposited by the 3rd electric capacity C3, and be input to 3 pin of operational amplifier OPA228,3 pin are positive inputs, reverse input end 2 is connected with output terminal 6, and 4,7 pin of operational amplifier OPA228 are the Power supply of chip, 5 pin are without electrical connection, be only used to the specification encapsulated, 1,8 pin are the direct current biasing adjustment end of operational amplifier, can unsettled need not, circuit is now emitter follower, can realize impedance transformation, mates with late-class circuit to facilitate.
The concrete control realization of the utility model is prior art, and the utility model is generator structure-design technique scheme only.
Claims (6)
1. a peak-detector circuit, is characterized in that: comprise the second electric capacity C2, the 3rd electric capacity C3, the 3rd diode D3, the 4th diode D4, the second resistance R2, the 3rd resistance R3, the 4th resistance R4 and operational amplifier; The one termination signal input part of the second described electric capacity C2,3 pin of operational amplifier are connect after the other end of the second electric capacity C2 is connected with the 3rd diode D3, the DC voltage of the second described resistance R2 mono-termination 12V, ground connection after the second resistance R2 other end is connected with the 4th diode D4; First node is provided with between the second described electric capacity C2 and the 3rd diode D3, Section Point is provided with between second resistance R2 and the 4th diode D4, the 3rd resistance R3 is connected between described first node and Section Point, the 3rd described electric capacity C3 and one end ground connection of the 4th resistance R4,3 pin of another termination operational amplifier; Described operational amplifier 1 pin, 5 pin, 8 pin skies connect, and 4 pin connect-12V voltage, and 7 pin connect+12V voltage, and 2 pin are reverse input end, 6 pin are output terminal, and 2 described pin are connected with 6 pin.
2. a kind of peak-detector circuit according to claim 1, is characterized in that: the 3rd described electric capacity C3 adopts electric leakage few, the thin-film capacitor that precision is high.
3. a kind of peak-detector circuit according to claim 2, is characterized in that: the 3rd described electric capacity C3 adopts polyphenyl electric capacity.
4. a kind of peak-detector circuit according to claim 1, is characterized in that: described operational amplifier adopts model to be the operational amplifier of OPA228.
5. a kind of peak-detector circuit according to claim 1, is characterized in that: the 3rd described diode D3, the 4th diode D4 adopt the diode that specification is identical.
6. a kind of peak-detector circuit according to claim 5, is characterized in that: the 3rd described diode D3, the 4th diode D4 adopt model to be the diode of 1N4148.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520323156.3U CN204613276U (en) | 2015-05-19 | 2015-05-19 | A kind of peak-detector circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520323156.3U CN204613276U (en) | 2015-05-19 | 2015-05-19 | A kind of peak-detector circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204613276U true CN204613276U (en) | 2015-09-02 |
Family
ID=53965824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520323156.3U Expired - Fee Related CN204613276U (en) | 2015-05-19 | 2015-05-19 | A kind of peak-detector circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204613276U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802579A (en) * | 2018-05-18 | 2018-11-13 | 苏州树云网络科技有限公司 | A kind of system for monitoring ring main unit on-line |
| CN111208450A (en) * | 2020-01-20 | 2020-05-29 | 浙江大学 | Basic leakage detection chip of leakage protector |
-
2015
- 2015-05-19 CN CN201520323156.3U patent/CN204613276U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802579A (en) * | 2018-05-18 | 2018-11-13 | 苏州树云网络科技有限公司 | A kind of system for monitoring ring main unit on-line |
| CN111208450A (en) * | 2020-01-20 | 2020-05-29 | 浙江大学 | Basic leakage detection chip of leakage protector |
| CN111208450B (en) * | 2020-01-20 | 2020-12-08 | 浙江大学 | Basic leakage detection chip of leakage protector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204314348U (en) | A kind of high voltage and constant current electronic load circuit | |
| CN203101477U (en) | Hall closed-loop current sensor | |
| CN204613276U (en) | A kind of peak-detector circuit | |
| CN102739348B (en) | Decoding circuit | |
| CN205037982U (en) | Utilize constant current source temperature detection circuit of operational amplifier characteristic | |
| CN203287811U (en) | Maximum power tracking control circuit based on BUCK circuit | |
| CN202189088U (en) | Alternating-current voltage isolating and measuring circuit based on combination of mutual inductor and operational amplifier | |
| CN202771295U (en) | Voltage stabilizing circuit | |
| CN204559542U (en) | A kind of current-to-voltage converting circuit with inputting biased and active power filtering | |
| CN203720260U (en) | Electric energy meter having power protection circuit | |
| CN208079468U (en) | The controlled constant-current source circuit of Linear Control | |
| CN203745082U (en) | Photosensitive circuit for detecting photosensitive signals | |
| CN103091543B (en) | Current detection circuit, constant current circuit and battery charging and discharging protective system | |
| CN203135726U (en) | Switch power supply circuit and power supply device | |
| CN203313128U (en) | Novel infrared amplifying circuit | |
| CN203813662U (en) | Switch power supply converter achieving rapid current detection | |
| CN203069649U (en) | Current detection circuit, a constant current circuit and a cell charging and discharging protection system | |
| CN206945810U (en) | A kind of crest voltage for carrying reset maintains circuit | |
| CN201497771U (en) | Precision full-wave detection type current detection device | |
| CN203289450U (en) | Infrared receiver | |
| CN201955395U (en) | Sensor frequency transmitter circuit | |
| CN203178344U (en) | Direct current voltage signal acquisition circuit | |
| CN204028203U (en) | A kind of anode current sampling circuit | |
| CN203301428U (en) | Infrared amplifier with filter function | |
| CN201928247U (en) | Triangular wave signal generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20150902 Termination date: 20160519 |