CN203039601U - Improved rectifying and amplifying circuit - Google Patents
Improved rectifying and amplifying circuit Download PDFInfo
- Publication number
- CN203039601U CN203039601U CN 201220701549 CN201220701549U CN203039601U CN 203039601 U CN203039601 U CN 203039601U CN 201220701549 CN201220701549 CN 201220701549 CN 201220701549 U CN201220701549 U CN 201220701549U CN 203039601 U CN203039601 U CN 203039601U
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- Prior art keywords
- diode
- operational amplifier
- capacitor
- resistor
- pin
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- 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
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- Amplifiers (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
An improved rectifying and amplifying circuit is designed in the utility model and comprises a resistor R1, a resistor R2, a capacitor C1, an operational amplifier N1, a diode D1 and a diode D2. One end of the resistor R2 is connected with the capacitor C1, one end of the resistor R1, an anode of the diode D1 and a pin 2 of the operational amplifier N1. The other ends of the capacitor C1 and the resistor R1 are connected with the cathode of the diode D2. The anode of the diode D2 is connected with the cathode of the diode D1 and a pin 6 of the operational amplifier N1. A pin 3 of the operational amplifier N1 is grounded. The utility model has beneficial effects as follows: rectification accuracy and linearity for signal power detection are raised and accuracy of signal power detection by a control system is enhanced; the circuit is simple and reliable; the influence caused by dead-time voltage of the diodes is effectively weakened and the detection circuit has high sensitivity; and the circuit is practical and flexible, and different magnification times can be set.
Description
Technical field
The utility model designs a kind of follow-on amplification rectification circuit.
Background technology
When utilizing analogue audio frequency channel transmitting high speed digital signal, control system need detect the signal power on the channel, and power detection commonly used has diode detection power method, equivalent heat power consumption detection method, real effective/direct current (TRMS/DC) transition detection power method, logarithm amplification detection power method etc.Wherein simple with the diode detection method, but the diode detection error is bigger, when doing low frequency signal power and differentiate sensitivity relatively poor, circuit rectification precision and the linearity are all relatively poor.
Summary of the invention
In view of the deficiency of diode testing circuit, the utility model provides a kind of follow-on amplification rectification circuit that utilizes the active device design, can remedy the deficiency of diode testing circuit rectification precision and the linearity.
The utility model for achieving the above object, the technical scheme of taking is: a kind of follow-on amplification rectification circuit, it is characterized in that: comprise resistance R 1, resistance R 2, capacitor C 1, operational amplifier N1, diode D1, diode D2, one termination capacitor C1 of described resistance R 2, an end of resistance R 1 and the positive pole of diode D1,2 pin of operational amplifier N1, the negative pole of another terminating diode D2 of capacitor C 1, resistance R 1, the positive pole of diode D2 connects the negative pole of diode D1 and 6 pin of operational amplifier N1, the 3 pin ground connection of operational amplifier N1.
The beneficial effects of the utility model are: rectification precision and the linearity that signal power is detected are improved, and improve the accuracy that control system detects signal power.Circuit is simple, reliable; Effectively weakened the influence that diode dead band voltage brings, testing circuit is highly sensitive; Circuit is practical flexibly, can set different amplification.
Description of drawings
Fig. 1 is the utility model circuit theory diagrams.
Embodiment
As shown in Figure 1, a kind of follow-on amplification rectification circuit, comprise resistance R 1, resistance R 2, capacitor C 1, operational amplifier N1, diode D1, diode D2, one termination capacitor C1 of resistance R 2, an end of resistance R 1 and the positive pole of diode D1,2 pin of operational amplifier N1, the negative pole of another terminating diode D2 of capacitor C 1, resistance R 1, the positive pole of diode D2 connects the negative pole of diode D1 and 6 pin of operational amplifier N1, the 3 pin ground connection of operational amplifier N1.
Diode D2 plays rectified action, operational amplifier N1 plays the effect of signal being amplified and weakens diode D2 dead band voltage influence, resistance R 1 resistance changes the adjusting that can realize multiplication factor, and phase compensation capacitor C 1 plays the self-oscillatory effect of operational amplifier that prevents.
The model of operational amplifier N1 is: OP07C.
Claims (1)
1. follow-on amplification rectification circuit, it is characterized in that: comprise resistance R 1, resistance R 2, capacitor C 1, operational amplifier N1, diode D1, diode D2, one termination capacitor C1 of described resistance R 2, an end of resistance R 1 and the positive pole of diode D1,2 pin of operational amplifier N1, the negative pole of another terminating diode D2 of capacitor C 1, resistance R 1, the positive pole of diode D2 connects the negative pole of diode D1 and 6 pin of operational amplifier N1, the 3 pin ground connection of operational amplifier N1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220701549 CN203039601U (en) | 2012-12-18 | 2012-12-18 | Improved rectifying and amplifying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220701549 CN203039601U (en) | 2012-12-18 | 2012-12-18 | Improved rectifying and amplifying circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203039601U true CN203039601U (en) | 2013-07-03 |
Family
ID=48691686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220701549 Expired - Fee Related CN203039601U (en) | 2012-12-18 | 2012-12-18 | Improved rectifying and amplifying circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203039601U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106604159A (en) * | 2016-12-05 | 2017-04-26 | 成都小晓学教育咨询有限公司 | Amplification device capable of enhancing effect of acoustic system |
| CN110361591A (en) * | 2019-08-15 | 2019-10-22 | 杭州电子科技大学 | Three-phase alternating current high-precision quick detection circuit based on mutual inductor |
-
2012
- 2012-12-18 CN CN 201220701549 patent/CN203039601U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106604159A (en) * | 2016-12-05 | 2017-04-26 | 成都小晓学教育咨询有限公司 | Amplification device capable of enhancing effect of acoustic system |
| CN110361591A (en) * | 2019-08-15 | 2019-10-22 | 杭州电子科技大学 | Three-phase alternating current high-precision quick detection circuit based on mutual inductor |
| CN110361591B (en) * | 2019-08-15 | 2021-05-11 | 杭州电子科技大学 | Three-phase alternating current high-precision rapid detection circuit based on mutual inductor |
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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: 20130703 Termination date: 20161218 |