CN213585713U - Operational amplifier - Google Patents
Operational amplifier Download PDFInfo
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- CN213585713U CN213585713U CN202023289516.2U CN202023289516U CN213585713U CN 213585713 U CN213585713 U CN 213585713U CN 202023289516 U CN202023289516 U CN 202023289516U CN 213585713 U CN213585713 U CN 213585713U
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- operational amplifier
- resistor
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- module
- resistance
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Abstract
The utility model discloses a device is put to fortune, include host system, signal generation module, fortune circuit module and be used for regulating and control the resistance programmable resistance module of fortune circuit module well resistance, host system passes through signal generation module with resistance programmable module signal connection, resistance programmable module with host system electric connection. The circuit is simple and is beneficial to automation.
Description
Technical Field
The utility model relates to the technical field of circuits, especially, relate to a device is put to fortune.
Background
In electronic circuits, it is often necessary to amplify a voltage, at which time an operational amplifier is often used to amplify the output voltage.
However, the amplification input voltage of a general operational amplifier circuit is fixed, and a plurality of amplified output voltages are sometimes required, and in this case, a plurality of operational amplifiers are generally used to output a plurality of voltages, which results in a complicated circuit.
There are also a few methods for outputting various amplified voltages by replacing the resistor in the operational amplifier circuit, but such methods are cumbersome and not conducive to automation.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide an operational amplifier device, the circuit of which is simple and is beneficial to automation.
The purpose of the utility model is realized by adopting the following technical scheme:
the operational amplifier device comprises a main control module, a signal generation module, an operational amplifier circuit module and a programmable resistance module, wherein the programmable resistance module is used for regulating and controlling resistance in the operational amplifier circuit module, the main control module is connected with the programmable resistance module through the signal generation module in a signal mode, and the programmable resistance module is electrically connected with the main control module.
Preferably, the programmable resistance module comprises a programmable operational amplifier resistance and a programmable load resistance, and the programmable operational amplifier resistance and the programmable load resistance are respectively and electrically connected to the operational amplifier circuit module.
Preferably, the operational amplifier circuit module includes an operational amplifier a1, a resistor R1, a resistor R2 and a resistor R3, one end of the resistor R1 is grounded, the other end of the resistor R1 is electrically connected to a negative input terminal of the operational amplifier a1, and the resistor R2 is electrically connected to a positive input terminal of the operational amplifier a 1.
Preferably, the operational amplifier circuit module further includes a resistor R4, one end of the resistor R4 is electrically connected to the output terminal of the operational amplifier a1, and the other end of the resistor R4 is grounded.
Preferably, the operational amplifier circuit module further includes a capacitor C1, a capacitor C2, and a capacitor C3, one end of the capacitor C1 is electrically connected to a negative power input terminal V-of the operational amplifier a1, the other end of the capacitor C1 is grounded, one end of the capacitor C2 is electrically connected to a positive power input terminal V + of the operational amplifier a1, and the capacitor C3 is connected in parallel to the resistor R3.
Preferably, the resistor R3 is electrically connected to a programmable resistor, and the resistor R4 is electrically connected to the programmable load resistor.
Preferably, the operational amplifier circuit module further includes a post-stage follower circuit, and an input end of the post-stage follower circuit is electrically connected to an output end of the operational amplifier a 1.
Preferably, the post-stage follower circuit includes an operational amplifier a2, an operational amplifier A3 and an operational amplifier a4, a positive input terminal of the operational amplifier a2 is electrically connected to an output terminal of the operational amplifier a1, a negative input terminal of the operational amplifier a2 is electrically connected to an output terminal, an output terminal of the operational amplifier a2 is electrically connected to a positive input terminal of the operational amplifier A3, a negative input terminal of the operational amplifier A3 is electrically connected to an output terminal, an output terminal of the operational amplifier A3 is electrically connected to a positive input terminal of the operational amplifier a4, and a negative input terminal of the operational amplifier a4 is electrically connected to an output terminal.
Preferably, the signal generating module comprises a sine wave generator or a square wave generator.
Preferably, the programmable resistance module comprises a 100 ohm resistance array, a 1000 ohm resistance array and a 10K ohm resistance array.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the operational amplifier device is provided with the programmable resistance module for regulating and controlling the resistance in the operational amplifier circuit module, the resistance value in the operational amplifier circuit module can be changed by editing the programmable resistance module, various voltages can be output, automation is facilitated, and the operational amplifier circuit is simplified.
Drawings
Fig. 1 is a functional block diagram of an operational amplifier device according to the present invention;
fig. 2 is a schematic diagram of the circuit structure of the operational amplifier circuit module without the post-stage follower circuit of the present invention;
fig. 3 is a schematic diagram of a circuit structure of the post-stage follower circuit of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments:
in the description of the present invention, it should be noted that the terms "first", "second", "third", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
As shown in fig. 1, the utility model discloses an operational amplifier device, include host system, signal generation module, operational amplifier circuit module and be used for regulating and control the programmable resistance module of resistance in the operational amplifier circuit module, host system passes through signal generation module with programmable resistance module signal connection, programmable resistance module with host system electric connection.
The operational amplifier is provided with the programmable resistance module for regulating and controlling the resistance in the operational amplifier circuit module, the resistance value in the operational amplifier circuit module can be changed by editing the programmable resistance module, and various amplified voltages can be output, so that the resistance in the operational amplifier circuit does not need to be changed, the automation is facilitated, a plurality of operational amplifiers do not need to be arranged to output different voltages, and the operational amplifier circuit is simplified.
The main control module comprises an MCU chip for setting the resistance value, the MCU chip can communicate with an external PC, a program or an instruction for setting the resistance is input into the MCU chip through the PC, and the resistance of the operational amplifier circuit is set through the program for setting the resistance, so that automation is realized. Of course, the main control module may also include a touch screen, and a program or an instruction for editing the resistance value is set through the touch screen. In order to facilitate the communication between the main control module and an external PC, a TCP/IP interface is also arranged on the operational amplifier. The signal generation module and the main control module are electrically connected with an external power supply (commercial power) through an interface AC.
As shown in fig. 1-2, in a preferred embodiment, the operational amplifier circuit module includes an operational amplifier a1, a resistor R1, a resistor R2, and a resistor R3, one end of the resistor R1 is grounded, the other end of the resistor R1 is electrically connected to a negative input terminal of the operational amplifier a1, and the resistor R2 is electrically connected to a positive input terminal of the operational amplifier a 1. The operational amplifier circuit module further comprises a resistor R4, wherein one end of the resistor R4 is electrically connected with the output end of the operational amplifier A1, and the other end of the resistor R4 is grounded. The operational amplifier circuit module further comprises a capacitor C1, a capacitor C2 and a capacitor C3, one end of the capacitor C1 is electrically connected with a negative power input end V-of the operational amplifier A1, the other end of the capacitor C1 is grounded, one end of the capacitor C2 is electrically connected with a positive power input end V + of the operational amplifier A1, and the capacitor C3 is connected with the resistor R3 in parallel.
In the above embodiment, as shown in fig. 2, the operational amplifier circuit formed by the above elements is an in-phase operational amplifier circuit, and the output voltage Vout1 is equal to V1 (R3/R1+1), where the resistor R4 is a load resistor, and the resistances of the resistor R3 and the resistor R4 can be controlled by the programmable resistor module. The voltage V1 can be generated by the signal generation module, which includes a sine wave generator or a square wave generator, and the sine wave signal or the square wave signal generated by the signal generation module is convenient for detection and control. The capacitor C1, the capacitor C2 and the capacitor C3 play a role in filtering noise. The operational amplifier A1 can be connected with an external input voltage through an interface ADD, the operational amplifier circuit module can be grounded through an interface VSS, and an output voltage Vout1 can be output through an interface Vout 1.
It is understood that the in-phase operational amplifier circuit can be replaced by an out-phase operational amplifier circuit or a differential operational amplifier circuit.
In another preferred embodiment, the programmable resistance module includes a programmable operational amplifier resistance and a programmable load resistance, and the programmable operational amplifier resistance and the programmable load resistance are respectively and electrically connected to the operational amplifier circuit module. The resistor R3 is electrically connected with the programmable resistor, and the resistor R4 is electrically connected with the programmable load resistor. The operational amplifier circuit module further comprises a post-stage follower circuit, and the input end of the post-stage follower circuit is electrically connected with the output end of the operational amplifier A1. The programmable resistance module comprises a 100 ohm resistance array, a 1000 ohm resistance array and a 10K ohm resistance array.
In the above embodiment, the 100 ohm resistor array includes a plurality of circuits in which 100 ohm resistors are connected in parallel, the 1000 ohm resistor array includes a plurality of circuits in which 1000 ohm resistors are connected in parallel, the 10K ohm resistor array includes a plurality of circuits in which 10K ohm resistors are connected in parallel, the main control module may select one or more resistors in the programmable resistor module to be connected in parallel or in series as the resistors in the operational amplifier circuit module, for example, two parallel 100 ohm resistors and two parallel 1000 ohm resistors are connected in series to form a resistor with a resistance value of 1/(1/100+1/100) +1/(1/1000+1/1000) ═ 550 ohm.
In another preferred embodiment, as shown in fig. 3, the post-follower circuit includes an operational amplifier a2, an operational amplifier A3 and an operational amplifier a4, wherein a positive input terminal of the operational amplifier a2 is electrically connected to an output terminal of the operational amplifier a1, a negative input terminal of the operational amplifier a2 is electrically connected to an output terminal, an output terminal of the operational amplifier a2 is electrically connected to a positive input terminal of the operational amplifier A3, a negative input terminal of the operational amplifier A3 is electrically connected to an output terminal, an output terminal of the operational amplifier A3 is electrically connected to a positive input terminal of the operational amplifier a4, and a negative input terminal of the operational amplifier a4 is electrically connected to an output terminal.
In the above embodiment, as shown in fig. 3, the post-stage follower circuit is mainly used for testing the function of the operational amplifier circuit module, the voltage Vout2 output by the operational amplifier a2 is electrically connected to an external test device such as a voltmeter through an interface Vout2, the voltage Vout3 output by the operational amplifier A3 is electrically connected to an external test device such as an oscilloscope through an interface Vout3, and the voltage Vout3 output by the operational amplifier A3 is electrically connected to an external test device such as a frequency acquisition device through an interface Vout 3.
In summary, the operational amplifier device controls the programmable resistance module to output various resistances to the operational amplifier circuit module through the main control module, so that the operational amplifier circuit module can output various voltages, the operational amplifier circuit is simple, automation is realized, and the operational amplifier circuit module is also beneficial to test.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes are intended to fall within the scope of the claims.
Claims (10)
1. The operational amplifier device is characterized by comprising a main control module, a signal generation module, an operational amplifier circuit module and a programmable resistance module, wherein the programmable resistance module is used for regulating and controlling resistance in the operational amplifier circuit module, the main control module is connected with the programmable resistance module through the signal generation module in a signal mode, and the programmable resistance module is electrically connected with the main control module.
2. The operational amplifier device according to claim 1, wherein the programmable resistance module comprises a programmable operational amplifier resistance and a programmable load resistance, and the programmable operational amplifier resistance and the programmable load resistance are electrically connected to the operational amplifier circuit module, respectively.
3. The operational amplifier device as claimed in claim 2, wherein the operational amplifier circuit module comprises an operational amplifier a1, a resistor R1, a resistor R2 and a resistor R3, one end of the resistor R1 is connected to ground, the other end of the resistor R1 is electrically connected to a negative input terminal of the operational amplifier a1, and the resistor R2 is electrically connected to a positive input terminal of the operational amplifier a 1.
4. The operational amplifier device as claimed in claim 3, wherein the operational amplifier circuit module further comprises a resistor R4, one end of the resistor R4 is electrically connected to the output terminal of the operational amplifier A1, and the other end of the resistor R4 is grounded.
5. The operational amplifier device as claimed in claim 4, wherein the operational amplifier circuit module further comprises a capacitor C1, a capacitor C2 and a capacitor C3, wherein one end of the capacitor C1 is electrically connected to the negative power input V-of the operational amplifier a1, the other end of the capacitor C1 is grounded, one end of the capacitor C2 is electrically connected to the positive power input V + of the operational amplifier a1, and the capacitor C3 is connected in parallel to the resistor R3.
6. The op-amp device of claim 3, wherein the resistor R3 is electrically connected to a programmable resistor, and the resistor R4 is electrically connected to the programmable load resistor.
7. The operational amplifier device as claimed in claim 3, wherein the operational amplifier circuit module further comprises a post-stage follower circuit, and an input terminal of the post-stage follower circuit is electrically connected to an output terminal of the operational amplifier A1.
8. The operational amplifier device as claimed in claim 7, wherein the post-follower circuit comprises an operational amplifier a2, an operational amplifier A3 and an operational amplifier a4, wherein the positive input terminal of the operational amplifier a2 is electrically connected to the output terminal of the operational amplifier a1, the negative input terminal of the operational amplifier a2 is electrically connected to the output terminal, the output terminal of the operational amplifier a2 is electrically connected to the positive input terminal of the operational amplifier A3, the negative input terminal of the operational amplifier A3 is electrically connected to the output terminal, the output terminal of the operational amplifier A3 is electrically connected to the positive input terminal of the operational amplifier a4, and the negative input terminal of the operational amplifier a4 is electrically connected to the output terminal.
9. The op-amp device of claim 1, wherein the signal generation module comprises a sine wave generator or a square wave generator.
10. The op-amp device of claim 1, wherein the programmable resistance module comprises a 100 ohm resistor array, a 1000 ohm resistor array, and a 10K ohm resistor array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023289516.2U CN213585713U (en) | 2020-12-31 | 2020-12-31 | Operational amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023289516.2U CN213585713U (en) | 2020-12-31 | 2020-12-31 | Operational amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213585713U true CN213585713U (en) | 2021-06-29 |
Family
ID=76553061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023289516.2U Active CN213585713U (en) | 2020-12-31 | 2020-12-31 | Operational amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213585713U (en) |
-
2020
- 2020-12-31 CN CN202023289516.2U patent/CN213585713U/en active Active
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