CN217116036U - High-precision high-voltage operational amplification module and electronic equipment - Google Patents
High-precision high-voltage operational amplification module and electronic equipment Download PDFInfo
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- CN217116036U CN217116036U CN202220594779.4U CN202220594779U CN217116036U CN 217116036 U CN217116036 U CN 217116036U CN 202220594779 U CN202220594779 U CN 202220594779U CN 217116036 U CN217116036 U CN 217116036U
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Abstract
The utility model provides a high accuracy high pressure operational amplification module and electronic equipment, high accuracy high pressure operational amplification module includes signal processor, a plurality of signal amplifier and linear high low voltage power supply, wherein, signal processor includes filtering loop and preceding stage zoom circuit, preceding stage zoom circuit disposes the resistance of zooming that is used for changing the zoom multiple, preceding stage zoom circuit's signal output part connects a plurality of signal amplifier's signal input part; the low-voltage output end of the linear high-low voltage power supply is connected with the power input end of the signal processor, and the high-voltage output end of the linear high-low voltage power supply is connected with the power input ends of the signal amplifiers. The utility model discloses can guarantee its high accuracy and low noise in high voltage output, guarantee the use precision of follow-up load.
Description
Technical Field
The utility model relates to a circuit field particularly, relates to a high accuracy high pressure operational amplification module and electronic equipment.
Background
With the increasing variety of semiconductor integrated circuit products, the application of electronic technology has penetrated into various fields of social life, greatly influencing and improving people's lives. People have higher and higher requirements on the performance of electronic products. Some popular electronic products, such as computers, multimedia, digital signal processing, communications, etc., require a high processing speed, a high operation accuracy, a low power consumption, etc., under a low pressure. In motor control systems, high-voltage power regulators and oil logging systems, electronic products are required to stably work under higher power supply voltage, can resist high voltage, and have excellent performance indexes as low-voltage devices. This brings great pressure and power to design and production, and is a problem which needs to be solved urgently.
The existing integrated circuit design has the advantages of high integrity, but the defect of inconvenience in testing and maintenance. And the traditional high-voltage operational amplification module can only achieve high output voltage or high precision and low noise, but not both simultaneously.
SUMMERY OF THE UTILITY MODEL
In view of the above, an object of the present invention is to provide a high-precision high-voltage operational amplifier module and an electronic device, so as to improve the above-mentioned problems.
The embodiment of the utility model provides a high accuracy high pressure operational amplification module, it includes signal processor, a plurality of signal amplifier and linear high low voltage power supply, wherein, signal processor includes filtering loop and preceding stage zoom circuit, preceding stage zoom circuit disposes the resistance of zooming that is used for changing the zoom multiple, preceding stage zoom circuit's signal output part connects a plurality of signal amplifier's signal input part; the low-voltage output end of the linear high-low voltage power supply is connected with the power input end of the signal processor, and the high-voltage output end of the linear high-low voltage power supply is connected with the power input ends of the signal amplifiers.
Preferably, the filter loop comprises a first operational amplifier, a second operational amplifier, a first resistor Rf2, a second resistor Rf3, a third resistor Rf4, a first capacitor Cf10, a second capacitor Cf12 and a third capacitor Cf 20; the signal output end of the first operational amplifier is connected to the non-inverting input end of the second operational amplifier sequentially through a first resistor Rf2, a second resistor Rf3 and a third resistor Rf 4; one end of the first capacitor Cf10 is located between the first resistor Rf2 and the second resistor Rf3, and the other end is connected to the non-inverting input end of the first operational amplifier; one end of the second capacitor Cf12 is located between the third resistor Rf4 and the non-inverting input terminal of the second operational amplifier; the other end of the first operational amplifier is connected with the non-inverting input end of the first operational amplifier; one end of the third capacitor Cf20 is located between the second resistor Rf3 and the third resistor Rf4, and the other end is connected to the signal output end of the second operational amplifier.
Preferably, the pre-stage scaling circuit comprises a third operational amplifier, a fourth operational amplifier, a first scaling resistor Rf16, a second scaling resistor Rf 25; the inverting input end of the third operational amplifier is connected with the signal output end of the second operational amplifier, and the signal output end of the third operational amplifier is connected with the inverting input end of the fourth operational amplifier; two ends of the first scaling resistor Rf16 are respectively connected to the inverting input end and the signal output end of the third operational amplifier; and two ends of the second scaling resistor are respectively connected with the inverting input end and the signal output end of the fourth operational amplifier.
Preferably, the pre-stage scaling circuit comprises a first variable resistor RD1 and a second variable resistor RD 2; the first variable resistor RD1 and the second variable resistor RD2 are the zeroing control resistors of the third operational amplifier and the fourth operational amplifier, respectively.
Preferably, the signal amplifier comprises a high-voltage operational amplification chip, an output current-limiting resistor, an output protection circuit and an output switch; the first pin of the high-voltage operational amplification chip is connected with the signal output end of the signal processor; the sixth pin of the high-voltage operational amplification chip is connected with the fifth pin through the output current-limiting resistor; the fifth pin is connected with the output switch and the output protection circuit.
Preferably, the fifth pin is an output pin; the output switch is a relay switch.
Preferably, the output protection circuit is formed by a plurality of diodes connected in series.
Preferably, the high-voltage operational amplifier chip forms a loop through a plurality of resistors.
The utility model also provides an electronic equipment, it includes as above-mentioned high accuracy high pressure operational amplification module.
The high-voltage operation amplifying part of the embodiment adopts an independent modular design, and is powered by a linear high-low voltage power supply, so that high precision and low noise are achieved while high voltage is finally output, and the use precision of subsequent loads is ensured. Meanwhile, due to the modularized design, the maintenance is very convenient, all devices do not need to be detected, only the output which has problems needs to be replaced or maintained, double protection is achieved in the aspect of safety, and dangers such as electric shock are avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic circuit diagram of a high-precision high-voltage operational amplifier module according to an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a signal processor according to an embodiment of the present invention.
Fig. 3(a) and (b) are schematic circuit diagrams of the linear high-low voltage power supply according to the embodiment of the present invention.
Fig. 4 is a schematic circuit diagram of a signal amplifier according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The invention will be described in further detail with reference to the following detailed description and accompanying drawings:
referring to fig. 1, an embodiment of the present invention provides a high-precision high-voltage operational amplifier module, which includes a signal processor 10, a plurality of signal amplifiers 20, and a linear high-low voltage power supply 30, wherein the signal processor includes a filter circuit and a pre-stage zoom circuit, the pre-stage zoom circuit is configured with a zoom resistor for changing a zoom multiple, and a signal output end of the pre-stage zoom circuit is connected to signal input ends of the plurality of signal amplifiers 20; the low voltage output terminal of the linear high-low voltage power supply 30 is connected to the power input terminal of the signal processor 10, and the high voltage output terminal of the linear high-low voltage power supply 30 is connected to the power input terminals of the plurality of signal amplifiers 20.
In this embodiment, as shown in fig. 2, the filter loop includes a first operational amplifier U13, a second operational amplifier U10, a first resistor Rf2, a second resistor Rf3, a third resistor Rf4, a first capacitor Cf10, a second capacitor Cf12, and a third capacitor Cf 20; the signal output end of the first operational amplifier U13 is connected to the non-inverting input end of the second operational amplifier U10 through a first resistor Rf2, a second resistor Rf3 and a third resistor Rf4 in sequence; one end of the first capacitor Cf10 is located between the first resistor Rf2 and the second resistor Rf3, and the other end is connected to the non-inverting input end of the first operational amplifier; one end of the second capacitor Cf12 is located between the third resistor Rf4 and the non-inverting input terminal of the second operational amplifier U10; the other end of the first operational amplifier U13 is connected with the non-inverting input end of the first operational amplifier U13; one end of the third capacitor Cf20 is located between the second resistor Rf3 and the third resistor Rf4, and the other end is connected to the signal output end of the second operational amplifier U10.
In this embodiment, the pre-stage scaling circuit includes a third operational amplifier U11, a fourth operational amplifier U12, a first scaling resistor Rf16, and a second scaling resistor Rf 25; wherein the inverting input terminal of the third operational amplifier U11 is connected to the signal output terminal of the second operational amplifier U10, and the signal output terminal of the third operational amplifier U11 is connected to the inverting input terminal of the fourth operational amplifier U12; two ends of the first scaling resistor Rf16 are respectively connected to the inverting input end and the signal output end of the third operational amplifier U11; two ends of the second scaling resistor Rf25 are respectively connected to the inverting input terminal and the signal output terminal of the fourth operational amplifier U12.
Wherein the pre-stage scaling circuit further comprises a first variable resistor RD1 and a second variable resistor RD 2; the first variable resistor RD1 and the second variable resistor RD2 are the zeroing control resistors of the third operational amplifier and the fourth operational amplifier, respectively.
The first operational amplifier U13 and the second operational amplifier U10 form a third-order butterworth filter, a filter loop is formed by the first resistor Rf2, the second resistor Rf3, the third resistor Rf4, the first capacitor Cf10, the second capacitor Cf12 and the third capacitor Cf20, and the required bandwidth can be set by changing the resistance values of the resistors and the capacitance values of the capacitors.
The third operational amplifier U11 and the fourth operational amplifier U12 are pre-stage scaling circuits, and the scaling factor can be changed by changing the resistances of the first scaling resistor Rf16 and the second scaling resistor Rf25, and then the required amplification factor is realized by matching with the signal amplifier 20.
The first variable resistor RD1 and the second variable resistor RD2 are zero control resistors for the outputs of the third operational amplifier U11 and the fourth operational amplifier U12, and can control the output offset of the pre-stage scaling circuit by changing the resistance values. The rest capacitors pC and the like are bypass capacitors of the power supply, and play roles in protecting the circuit and reducing noise.
As shown in fig. 3(a), u2 and u1 are the positive high voltage and negative high voltage outputs, respectively, of the linear high and low voltage power supply 30. As shown in fig. 3(b), u3 and u4 are the positive low voltage and negative low voltage outputs, respectively, of the linear high low voltage power supply 30.
As shown in fig. 4, the number of the signal amplifiers 20 can be set according to actual needs, and the number of the signal amplifiers 20 is 6 in this embodiment, but it should not be understood as a limitation of the present invention, wherein each signal amplifier 20 includes a high-voltage operational amplifier chip U1, an output current limiting resistor RL, an output protection circuit, and an output switch U14; a first pin (signal input pin) of the high-voltage operational amplification chip U1 is connected to a signal output terminal of the signal processor 10; the sixth pin of the high-voltage operational amplification chip U1 is connected with the fifth pin through the output current-limiting resistor RL; the fifth pin is connected with the output switch U14 and the output protection circuit.
The high-voltage operational amplifier chip U1 may be LM358-VR, or other chips, which is not limited in the present invention.
The fifth pin is an output pin of the high-voltage operational amplifier chip U1; the high-voltage operational amplifier chip U1 sets the amplification factor of the operational amplifier circuit to the maximum factor of the chip through a loop formed by resistors R1, R2 and R6, the resistor R7 and three diodes Tra1, Tra2 and Tra3 connected in series form an output protection circuit, and when a load has a problem and the output of the signal amplifier 20 exceeds an expected value, the output is directly cut off to protect the circuit. The output switch U14 is a relay switch, which controls the on/off of the high voltage through a low voltage, further ensuring the safety.
In this embodiment, the conventional high-voltage operational amplifier module directly changes the amplification factor of the high-voltage operational amplifier chip to achieve the required amplification factor, but the inventor finds that the noise and the precision are optimal when the high-voltage operational amplifier chip is at the highest amplification factor, so in this embodiment, the task of controlling the amplification factor is put on the signal processor 10, which greatly reduces the noise influence of the high-voltage operational amplifier chip itself.
In summary, the high-voltage operation amplifying part of the embodiment adopts an independent modular design, and is powered by a linear high-low voltage power supply, so that high precision and low noise are achieved while high voltage is finally output, and the use precision of subsequent loads is ensured. Meanwhile, due to the modularized design, the maintenance is very convenient, all devices do not need to be detected, only the output which has problems needs to be replaced or maintained, double protection is achieved in the aspect of safety, and dangers such as electric shock are avoided.
The utility model also provides an electronic equipment, it includes as above-mentioned high accuracy high pressure operational amplification module.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The high-precision high-voltage operational amplification module is characterized by comprising a signal processor, a plurality of signal amplifiers and a linear high-voltage and low-voltage power supply, wherein the signal processor comprises a filter loop and a pre-stage scaling circuit, the pre-stage scaling circuit is provided with a scaling resistor for changing scaling times, and a signal output end of the pre-stage scaling circuit is connected with signal input ends of the signal amplifiers; the low-voltage output end of the linear high-low voltage power supply is connected with the power input end of the signal processor, and the high-voltage output end of the linear high-low voltage power supply is connected with the power input ends of the signal amplifiers.
2. The high-precision high-voltage operational amplification module according to claim 1, wherein the filter loop comprises a first operational amplifier, a second operational amplifier, a first resistor Rf2, a second resistor Rf3, a third resistor Rf4, a first capacitor Cf10, a second capacitor Cf12 and a third capacitor Cf 20; the signal output end of the first operational amplifier is connected to the non-inverting input end of the second operational amplifier sequentially through a first resistor Rf2, a second resistor Rf3 and a third resistor Rf 4; one end of the first capacitor Cf10 is located between the first resistor Rf2 and the second resistor Rf3, and the other end is connected to the non-inverting input end of the first operational amplifier; one end of the second capacitor Cf12 is located between the third resistor Rf4 and the non-inverting input terminal of the second operational amplifier; the other end of the first operational amplifier is connected with the non-inverting input end of the first operational amplifier; one end of the third capacitor Cf20 is located between the second resistor Rf3 and the third resistor Rf4, and the other end is connected to the signal output end of the second operational amplifier.
3. The high-precision high-voltage operational amplification module according to claim 2, wherein the pre-stage scaling circuit comprises a third operational amplifier, a fourth operational amplifier, a first scaling resistor Rf16, a second scaling resistor Rf 25; the inverting input end of the third operational amplifier is connected with the signal output end of the second operational amplifier, and the signal output end of the third operational amplifier is connected with the inverting input end of the fourth operational amplifier; two ends of the first scaling resistor Rf16 are respectively connected to the inverting input end and the signal output end of the third operational amplifier; and two ends of the second scaling resistor are respectively connected with the inverting input end and the signal output end of the fourth operational amplifier.
4. The high-precision high-voltage operational amplification module according to claim 3, wherein the pre-scaling circuit comprises a first variable resistor RD1 and a second variable resistor RD 2; the first variable resistor RD1 and the second variable resistor RD2 are the zeroing control resistors of the third operational amplifier and the fourth operational amplifier, respectively.
5. The high-precision high-voltage operational amplification module according to claim 1, wherein the signal amplifier comprises a high-voltage operational amplification chip, an output current limiting resistor, an output protection circuit and an output switch; the first pin of the high-voltage operational amplification chip is connected with the signal output end of the signal processor; the sixth pin of the high-voltage operational amplification chip is connected with the fifth pin through the output current-limiting resistor; the fifth pin is connected with the output switch and the output protection circuit.
6. The high-precision high-voltage operational amplification module according to claim 5, wherein the fifth pin is an output pin; the output switch is a relay switch.
7. The high-precision high-voltage operational amplification module according to claim 5, wherein the output protection circuit is formed by a plurality of diodes connected in series.
8. The high-precision high-voltage operational amplification module according to claim 5, wherein the high-voltage operational amplification chip forms a loop through a plurality of resistors.
9. An electronic device, comprising the high-precision high-voltage operational amplification module according to any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220594779.4U CN217116036U (en) | 2022-03-18 | 2022-03-18 | High-precision high-voltage operational amplification module and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220594779.4U CN217116036U (en) | 2022-03-18 | 2022-03-18 | High-precision high-voltage operational amplification module and electronic equipment |
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| CN217116036U true CN217116036U (en) | 2022-08-02 |
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| CN202220594779.4U Active CN217116036U (en) | 2022-03-18 | 2022-03-18 | High-precision high-voltage operational amplification module and electronic equipment |
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