CN103532507A - Sensor signal operational amplifier - Google Patents
Sensor signal operational amplifier Download PDFInfo
- Publication number
- CN103532507A CN103532507A CN201310501518.9A CN201310501518A CN103532507A CN 103532507 A CN103532507 A CN 103532507A CN 201310501518 A CN201310501518 A CN 201310501518A CN 103532507 A CN103532507 A CN 103532507A
- Authority
- CN
- China
- Prior art keywords
- operational amplifier
- resistance
- capacitor
- sensor signal
- circuit
- 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.)
- Pending
Links
Images
Landscapes
- Amplifiers (AREA)
Abstract
The invention discloses a sensor signal operational amplifier which comprises an input filtering circuit and an operational amplifier. A frequency compensation circuit is connected between the input filtering circuit and the operational amplifier, and a feedback circuit is also connected to the operational amplifier. The sensor signal operational amplifier has the advantage of being good in stability.
Description
Technical field
The present invention relates to a kind of integrated circuit, relate in particular a kind of sensor signal operational amplifier.
Background technology
Operational amplifier is widely used in electronic equipment and person in electronics, for example: inverting amplifier, integrator, filter circuit etc.In recent years, along with the quick micro of CMOS technique yardstick, the supply power voltage of very lagre scale integrated circuit (VLSIC) sharply reduces.Conventionally, the main characterisitic parameter of amplifier is gain and bandwidth, and gain and bandwidth have contrary relation.And operational amplifier is as a basic block of most of analogue systems, its stability also more and more receives people's concern.
Summary of the invention
The invention provides a kind of sensor signal operational amplifier, the good stability of its operational amplifier.
For solving above-mentioned technical problem, the present invention by the following technical solutions:
Sensor signal operational amplifier, it comprises input filter circuit and operational amplifier, between described input filter circuit and operational amplifier, is connected with frequency compensated circuit, is also connected with feedback circuit on described operational amplifier.In the present invention, input filter circuit carries out filtering processing to the signal of input, and frequency compensated circuit carries out frequency compensation to arithmetic unit, is that two limit spacing of operational amplifier increase, and can effectively increase the stability of operational amplifier.Feedback circuit feeds back the output signal of operational amplifier, makes input signal relevant to output signal, further the stability of boster.
Further technical scheme is:
As preferably, filter circuit comprises resistance R 1, resistance R 2 and capacitor C 1, and described resistance R 2 and one end of capacitor C 1 are connected to the two ends of resistance R 1, the equal ground connection of the other end of described resistance R 2 and capacitor C 1.Resistance R 1, resistance R 2 and capacitor C 1 form input filter circuit, and the two ends of resistance R 1 are respectively input and the output of input filter circuit.
Further, on the output of filter circuit, be connected with two-way admittance diode D1.Two-way admittance diode D1 carries out clamper to input voltage, and operational amplifier and circuit are protected, and avoids overtension to damage operational amplifier or circuit.
Further, described frequency compensated circuit comprises resistance R 3, capacitor C 3 and capacitor C 2, one end ground connection of described capacitor C 2, one end is connected with resistance R 3 with the in-phase input end of operational amplifier simultaneously, and the two ends of described capacitor C 3 are connected on the output of operational amplifier and the other end of resistance R 3.Resistance R 3, capacitor C 3 and capacitor C 2 form frequency compensated circuit, and operational amplifier is carried out to frequency compensation, and it can increase the spacing of two limits of operational amplifier, increases the stability of operational amplifier.
Further, described feedback circuit comprises resistance R 4 and resistance R 5, a non-common end grounding after described resistance R 4 and resistance R 5 series connection, another non-common port is connected on the output of operational amplifier, and resistance R 4 is connected with the common port of resistance R 5 and the reverse input end of operational amplifier.Feedback circuit makes input signal relevant to the ratio between output signal and resistance R 4 and resistance R 5 resistances.
As preferably, described operational amplifier is LMX324.Operational amplifier LMX324, its high-gain, low-power consumption, low maladjustment voltage.
Compared with prior art, the invention has the beneficial effects as follows: rate of connections compensating circuit on operational amplifier, it can effectively increase the spacing between two limits of operational amplifier, the further stability of enhance operation amplifier.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.Embodiments of the present invention include but not limited to the following example.
[embodiment]
Sensor signal operational amplifier as shown in Figure 1, it comprises input filter circuit and operational amplifier, between described input filter circuit and operational amplifier, is connected with frequency compensated circuit, is also connected with feedback circuit on described operational amplifier.
Described input filter circuit comprises resistance R 1, resistance R 2 and capacitor C 1, and described resistance R 2 and one end of capacitor C 1 are connected to the two ends of resistance R 1, the equal ground connection of the other end of described resistance R 2 and capacitor C 1.
On the output of described input filter circuit, be connected with two-way admittance diode D1.
Described frequency compensated circuit comprises resistance R 3, capacitor C 3 and capacitor C 2, one end ground connection of described capacitor C 2, one end is connected with resistance R 3 with the in-phase input end of operational amplifier simultaneously, and the two ends of described capacitor C 3 are connected on the output of operational amplifier and the other end of resistance R 3.
Described feedback circuit comprises resistance R 4 and resistance R 5, a non-common end grounding after described resistance R 4 and resistance R 5 series connection, another non-common port is connected on the output of operational amplifier, and resistance R 4 is connected with the common port of resistance R 5 and the reverse input end of operational amplifier.
Described operational amplifier is LMX324.
Be as mentioned above embodiments of the invention.The present invention is not limited to above-mentioned execution mode, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, within all falling into protection scope of the present invention.
Claims (6)
1. sensor signal operational amplifier, is characterized in that: it comprises input filter circuit and operational amplifier, between described input filter circuit and operational amplifier, is connected with frequency compensated circuit, is also connected with feedback circuit on described operational amplifier.
2. sensor signal operational amplifier according to claim 1, it is characterized in that: described input filter circuit comprises resistance R 1, resistance R 2 and capacitor C 1, described resistance R 2 and one end of capacitor C 1 are connected to the two ends of resistance R 1, the equal ground connection of the other end of described resistance R 2 and capacitor C 1.
3. sensor signal operational amplifier according to claim 2, is characterized in that: on the output of described input filter circuit, be connected with two-way admittance diode D1.
4. sensor signal operational amplifier according to claim 2, it is characterized in that: described frequency compensated circuit comprises resistance R 3, capacitor C 3 and capacitor C 2, one end ground connection of described capacitor C 2, one end is connected with resistance R 3 with the in-phase input end of operational amplifier simultaneously, and the two ends of described capacitor C 3 are connected on the output of operational amplifier and the other end of resistance R 3.
5. sensor signal operational amplifier according to claim 4, it is characterized in that: described feedback circuit comprises resistance R 4 and resistance R 5, a non-common end grounding after described resistance R 4 and resistance R 5 series connection, another non-common port is connected on the output of operational amplifier, and resistance R 4 is connected with the common port of resistance R 5 and the reverse input end of operational amplifier.
6. sensor signal operational amplifier according to claim 1, is characterized in that: described operational amplifier is LMX324.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310501518.9A CN103532507A (en) | 2013-10-23 | 2013-10-23 | Sensor signal operational amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310501518.9A CN103532507A (en) | 2013-10-23 | 2013-10-23 | Sensor signal operational amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103532507A true CN103532507A (en) | 2014-01-22 |
Family
ID=49934254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310501518.9A Pending CN103532507A (en) | 2013-10-23 | 2013-10-23 | Sensor signal operational amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103532507A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108377135A (en) * | 2018-04-14 | 2018-08-07 | 芜湖拓达电子科技有限公司 | A kind of signal acquiring system |
| CN108551334A (en) * | 2018-04-14 | 2018-09-18 | 芜湖泰庆电子科技有限公司 | A kind of signal acquiring system based on fortune amplifier circuit |
| CN108566170A (en) * | 2018-04-14 | 2018-09-21 | 芜湖拓达电子科技有限公司 | A kind of operation amplifier circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1116463A (en) * | 1993-11-09 | 1996-02-07 | 摩托罗拉公司 | Apparatus and method for frequency compensating an operational amplifier |
| CN101599741A (en) * | 2008-06-02 | 2009-12-09 | 联发科技（新加坡）私人有限公司 | Frequency-compensated operational amplifier |
| CN101677230A (en) * | 2008-09-15 | 2010-03-24 | 联发科技（新加坡）私人有限公司 | three-stage frequency-compensated operational amplifier |
| CN102866283A (en) * | 2012-09-12 | 2013-01-09 | 北京东方计量测试研究所 | Superimposed large-current bias alternative-current (AC) current measuring device |
-
2013
- 2013-10-23 CN CN201310501518.9A patent/CN103532507A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1116463A (en) * | 1993-11-09 | 1996-02-07 | 摩托罗拉公司 | Apparatus and method for frequency compensating an operational amplifier |
| CN101599741A (en) * | 2008-06-02 | 2009-12-09 | 联发科技（新加坡）私人有限公司 | Frequency-compensated operational amplifier |
| CN101677230A (en) * | 2008-09-15 | 2010-03-24 | 联发科技（新加坡）私人有限公司 | three-stage frequency-compensated operational amplifier |
| CN102866283A (en) * | 2012-09-12 | 2013-01-09 | 北京东方计量测试研究所 | Superimposed large-current bias alternative-current (AC) current measuring device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108377135A (en) * | 2018-04-14 | 2018-08-07 | 芜湖拓达电子科技有限公司 | A kind of signal acquiring system |
| CN108551334A (en) * | 2018-04-14 | 2018-09-18 | 芜湖泰庆电子科技有限公司 | A kind of signal acquiring system based on fortune amplifier circuit |
| CN108566170A (en) * | 2018-04-14 | 2018-09-21 | 芜湖拓达电子科技有限公司 | A kind of operation amplifier circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203405506U (en) | Sampling circuit of resistor divider type voltage sensor | |
| CN203537332U (en) | Power source sampled signal amplifying circuit | |
| CN103970176B (en) | A kind of low-dropout linear voltage-regulating circuit and application system thereof | |
| CN103532507A (en) | Sensor signal operational amplifier | |
| CN102769436A (en) | Inexpensive micro-power-consumption miniaturized signal conditioning module applicable to portable apparatuses | |
| CN203071878U (en) | Wideband direct-current amplifier based on voltage-controlled operational amplifier | |
| CN104639078B (en) | A kind of over-sampling modulate circuit of simplification | |
| CN201828595U (en) | DC voltage signal isolating amplifier circuit | |
| CN107479001B (en) | Battery electric quantity detection device and lamp | |
| CN203522659U (en) | Frequency-compensation sensor signal operational amplifier | |
| CN204479558U (en) | Intelligent gas acquisition probe | |
| CN207336632U (en) | A kind of radio-frequency power supply power-sensing circuit | |
| CN203337317U (en) | Debugging and temperature compensation circuit for pressure sensor | |
| CN104811181A (en) | Current-to-voltage conversion circuit with input bias and active power filtering effects and current-to-voltage conversion method | |
| CN204556030U (en) | Multiple sensor signals acquisition processing device | |
| CN204559542U (en) | A kind of current-to-voltage converting circuit with inputting biased and active power filtering | |
| CN203908665U (en) | Bamboo bridge vibration signal test circuit | |
| CN203869735U (en) | Novel grouting data acquisition circuit | |
| CN104482947B (en) | Mining Multiple typed sensor signal transmitting circuit | |
| CN203313128U (en) | Novel infrared amplifying circuit | |
| CN103529232A (en) | Interface circuit for wheel speed sensor of motor vehicle | |
| CN203761367U (en) | Multi-channel isolating device with signal isolating function | |
| CN203968084U (en) | A kind of signal conditioning circuit | |
| CN108227806A (en) | A kind of novel VI transformation output circuit | |
| CN203301428U (en) | Infrared amplifier with filter function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140122 |