CN101701975B - Precise full-wave detection type current detection device - Google Patents
Precise full-wave detection type current detection device Download PDFInfo
- Publication number
- CN101701975B CN101701975B CN200910034937XA CN200910034937A CN101701975B CN 101701975 B CN101701975 B CN 101701975B CN 200910034937X A CN200910034937X A CN 200910034937XA CN 200910034937 A CN200910034937 A CN 200910034937A CN 101701975 B CN101701975 B CN 101701975B
- Authority
- CN
- China
- Prior art keywords
- resistance
- operational amplifier
- connects
- detection device
- type current
- 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
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention discloses a precise full-wave detection type current detection device which comprises six resistors, two diodes and two operational amplifiers. The detection device is formed by integrated operational amplification without adopting a capacitor, keeps a transient response and has the advantages of good detection linearity, small error and stable and reliable circuit.
Description
Technical field
Invention relates to a kind of precise full-wave detection type current detection device, belongs to the technical field of current detecting.
Background technology
In the prior art, the method that current detecting often adopts mean value or peak value to detect is influenced by the diode dead band, causes the defective that nonlinearity erron is big, temperature effect is big, output impedance is big.
Summary of the invention
The present invention seeks to provides a kind of precise full-wave detection type current detection device at the defective that prior art exists.
The present invention adopts following technical scheme for achieving the above object:
Precise full-wave detection type current detection device of the present invention, it is characterized in that comprising six resistance, two diodes and two operational amplifiers, wherein input voltage connects the 5th respectively, one end of the 6th resistance, the reverse input end of another termination first operational amplifier of the 5th resistance, the reverse input end of another termination second operational amplifier of the 6th resistance, the positive input of first operational amplifier connects the negative electrode of second diode respectively, one end of first resistance and second resistance, the other end ground connection of first resistance, the other end of second resistance connects the anode of first diode respectively, one end of the 3rd resistance, the negative electrode of first diode connects the anode of second diode and the output terminal of first operational amplifier respectively, the other end of the 3rd resistance connects an end of the 4th resistance and the positive input of second operational amplifier respectively, the output terminal of another termination second operational amplifier of the 4th resistance.
The present invention adopts integrated transporting discharging to form pick-up unit, does not adopt electric capacity, has kept transient response, has the detection good linearity, and error is little, the advantage that circuit is reliable and stable.
Description of drawings
Fig. 1: circuit theory diagrams of the present invention.
Fig. 2: input voltage waveform figure of the present invention.
Fig. 3: output voltage waveform of the present invention.
Embodiment
Be elaborated below in conjunction with the technical scheme of accompanying drawing to invention:
As shown in Figure 1, precise full-wave detection type current detection device, it is characterized in that comprising six resistance, two diodes and two operational amplifiers, wherein input voltage connects the 5th respectively, one end of the 6th resistance, the reverse input end of another termination first operational amplifier of the 5th resistance, the reverse input end of another termination second operational amplifier of the 6th resistance, the positive input of first operational amplifier connects the negative electrode of second diode respectively, one end of first resistance and second resistance, the other end ground connection of first resistance, the other end of second resistance connects the anode of first diode respectively, one end of the 3rd resistance, the negative electrode of first diode connects the anode of second diode and the output terminal of first operational amplifier respectively, the other end of the 3rd resistance connects an end of the 4th resistance and the positive input of second operational amplifier respectively, the output terminal of another termination second operational amplifier of the 4th resistance.
Described precise full-wave detection type current detection device is characterized in that described operational amplifier is dual power supply high input impedance dual operational amplifier CF353.
Shown in Fig. 2,3, be respectively input voltage waveform figure of the present invention and output voltage waveform of the present invention.It is strong to export linearity by the visible the present invention of waveform among the figure, and output is stable.
Claims (2)
1. precise full-wave detection type current detection device, it is characterized in that comprising six resistance, two diodes and two operational amplifiers, wherein input voltage connects the 5th respectively, one end of the 6th resistance, the reverse input end of another termination first operational amplifier of the 5th resistance, the reverse input end of another termination second operational amplifier of the 6th resistance, the positive input of first operational amplifier connects the negative electrode of second diode respectively, one end of first resistance and second resistance, the other end ground connection of first resistance, the other end of second resistance connects the anode of first diode respectively, one end of the 3rd resistance, the negative electrode of first diode connects the anode of second diode and the output terminal of first operational amplifier respectively, the other end of the 3rd resistance connects an end of the 4th resistance and the positive input of second operational amplifier respectively, the output terminal of another termination second operational amplifier of the 4th resistance.
2. precise full-wave detection type current detection device according to claim 1 is characterized in that described operational amplifier is dual power supply high input impedance dual operational amplifier CF353.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910034937XA CN101701975B (en) | 2009-09-09 | 2009-09-09 | Precise full-wave detection type current detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910034937XA CN101701975B (en) | 2009-09-09 | 2009-09-09 | Precise full-wave detection type current detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101701975A CN101701975A (en) | 2010-05-05 |
| CN101701975B true CN101701975B (en) | 2011-09-14 |
Family
ID=42156895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910034937XA Active CN101701975B (en) | 2009-09-09 | 2009-09-09 | Precise full-wave detection type current detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101701975B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777340A (en) * | 2014-12-31 | 2015-07-15 | 陈瑞武 | Circuit for testing standby current |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1502996A (en) * | 2002-11-20 | 2004-06-09 | 伟 吴 | Detection isolation and transmission device for voltage and current signal |
| CN201497771U (en) * | 2009-09-09 | 2010-06-02 | 江苏达胜加速器制造有限公司 | Precision full-wave detection type current detection device |
-
2009
- 2009-09-09 CN CN200910034937XA patent/CN101701975B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1502996A (en) * | 2002-11-20 | 2004-06-09 | 伟 吴 | Detection isolation and transmission device for voltage and current signal |
| CN201497771U (en) * | 2009-09-09 | 2010-06-02 | 江苏达胜加速器制造有限公司 | Precision full-wave detection type current detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101701975A (en) | 2010-05-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204188702U (en) | A kind of current detection circuit | |
| CN204287446U (en) | A kind of power-fail detection circuit | |
| CN101701975B (en) | Precise full-wave detection type current detection device | |
| CN201497771U (en) | Precision full-wave detection type current detection device | |
| CN204882781U (en) | High -power converter drives detection circuitry in advance | |
| CN103364627A (en) | Leakage current detection circuit of automatic reclosing lock disconnector | |
| CN203968060U (en) | A kind of sample circuit for photovoltaic combiner box | |
| CN203039601U (en) | Improved rectifying and amplifying circuit | |
| CN107290619A (en) | A kind of electrode delamination detects circuit | |
| CN204613276U (en) | A kind of peak-detector circuit | |
| CN202075331U (en) | Current detecting circuit | |
| CN203130575U (en) | Alternating-current fan fault detecting circuit | |
| CN203504786U (en) | Electromagnetic heating control circuit and electric pressure cooker | |
| CN203365537U (en) | Autoreclose circuit breaker leakage current detection circuit | |
| CN202712884U (en) | Battery connection detecting circuit and battery charger | |
| CN101769954A (en) | Voltage detecting circuit for multiple serial batteries | |
| CN203504144U (en) | Electric leakage sampling circuit | |
| CN203275499U (en) | Inverter overload detection circuit | |
| CN103575962B (en) | Passive peak value follower circuit | |
| CN203572869U (en) | Passive peak value follower circuit | |
| CN203026930U (en) | Circuit for solving voltage overload of input port of operational amplifier | |
| CN202975966U (en) | Circuit capable of preventing power up failure | |
| CN202837465U (en) | Circuit for detecting output port connection state of power amplification module | |
| CN203761361U (en) | Level shift circuit | |
| CN201654117U (en) | Novel zero crossing detection circuit |
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 | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215214 Wujiang City, Jiangsu province FenHu Beishe Community Road No. 1288. Patentee after: CGN DASHENG ELECTRON ACCELERATOR TECHNOLOGY CO., LTD. Address before: 215214 Wujiang City, Jiangsu province FenHu Beishe Community Road No. 1288. Patentee before: Jiangsu Dasheng Accelerator Manufacturing Co., Ltd. |