CN219124178U - Operational amplifier circuit - Google Patents
Operational amplifier circuit Download PDFInfo
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- CN219124178U CN219124178U CN202320053150.3U CN202320053150U CN219124178U CN 219124178 U CN219124178 U CN 219124178U CN 202320053150 U CN202320053150 U CN 202320053150U CN 219124178 U CN219124178 U CN 219124178U
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- operational amplifier
- amplifier chip
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The utility model discloses an operational amplifier circuit, which relates to the technical field of operational amplifier circuits, and comprises a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R33, a resistor R9, a resistor R10, a capacitor C31, a capacitor C3, a capacitor C4, an amplifier chip U19.1 and an amplifier chip U19.2, wherein a double amplification structure is designed for sampling, the conversion rate of an amplifier is obviously improved, the design is ingenious, the popularization is worth, the circuit structure can be simplified, and the circuit cost is reduced.
Description
Technical Field
The utility model relates to the technical field of amplifier circuits, in particular to an operational amplifier circuit.
Background
Amplification is the most basic analog signal processing function, which is implemented by an amplifying circuit, and most analog electronic systems employ different types of amplifying circuits. The amplifying circuit is also a basic unit circuit forming other analog circuits such as filtering, oscillating, voltage stabilizing and other functional circuits.
Integrated op-amps generally employ a fully differential structure that is capable of suppressing common mode interference and noise. However, the common mode output voltage of the differential operational amplifier deviates from the design value due to the influence of factors such as manufacturing process, operating voltage and temperature, so that a common mode feedback circuit is required to determine the output dc voltage. Stability needs to be considered in designing the common mode feedback circuit.
Integrated operational amplifiers are a common circuit unit. To achieve high gain and large output signal range, a two-stage structure is generally employed. In order to ensure stable operation of a feedback circuit formed by an operational amplifier, miller compensation is generally employed to improve the phase margin of the operational amplifier.
In the conventional fully differential two-stage operational amplifier, the process variation sometimes exceeds the process angle range, which causes the input common-mode voltage range of the second-stage operational amplifier to change, so that the output common-mode voltage of the first-stage operational amplifier is mismatched with the input common-mode voltage of the second-stage operational amplifier, and the processable input voltage range of the second-stage operational amplifier is further reduced.
In view of the above drawbacks, there is a need for an improved two-stage operational amplifier.
Disclosure of Invention
The utility model aims to solve the technical problem of providing an operational amplifier circuit aiming at the defects of the background technology, and the operational amplifier circuit has a double amplification structure in sampling design, so that the conversion rate of an amplifier is obviously improved, the design is ingenious, the popularization is worth, the circuit structure can be simplified, and the circuit cost is reduced.
The utility model adopts the following technical scheme for solving the technical problems:
an operational amplifier circuit comprises a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R33, a resistor R9, a resistor R10, a capacitor C31, a capacitor C3, a capacitor C4, an amplifier chip U19.1, an amplifier chip U19.2, a VOUT+ terminal, a VOUT-terminal and a 2.5V voltage terminal;
the positive power supply pin of the amplifier chip U19.1 is grounded, the positive power supply pin of the amplifier chip U19.1 is respectively connected with one end of a resistor R33 and one end of a capacitor C31, the other end of the resistor R33 is connected with a VCC end, the other end of the capacitor C31 is grounded, the other end of the resistor R5 is respectively connected with the output end of the amplifier chip U19.1 and one end of the resistor R9, the other end of the resistor R9 is respectively connected with one end of the capacitor C3 and one end of the amplifier chip U19.2, the negative input pin of the amplifier chip U19.2 is respectively connected with the output end of the resistor R10, the other end of the capacitor C3 is grounded, and the other end of the resistor C10 is respectively connected with the other end of the capacitor C4 and the other end of the capacitor C4.
As a further preferable embodiment of the operational amplifier circuit of the present utility model, the resistance value of the resistor R4 and the resistor R5 is 1 kilo-ohm.
As a further preferable embodiment of the operational amplifier circuit of the present utility model, the resistances of the resistor R5, the resistor R7, and the resistor R33 are 100 kilo ohms.
As a further preferable embodiment of the operational amplifier circuit of the present utility model, the resistances of the resistor R9 and the resistor R10 are 10 kilo ohms.
As a further preferable embodiment of the operational amplifier circuit of the present utility model, the capacitance value of the capacitor C3 is 100nF.
Compared with the prior art, the technical scheme provided by the utility model has the following technical effects:
the utility model relates to an operational amplifier circuit which comprises a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R33, a resistor R9, a resistor R10, a capacitor C31, a capacitor C3, a capacitor C4, an amplifier chip U19.1 and an amplifier chip U19.2, wherein a double amplification structure is designed in a sampling way, the conversion rate of an amplifier is obviously improved, the design is ingenious, the popularization is worth, the circuit structure can be simplified, and the circuit cost is reduced.
Drawings
Fig. 1 is a circuit diagram of an operational amplifier circuit of the present utility model.
Detailed Description
The technical scheme of the utility model is further described in detail below with reference to the accompanying drawings:
the following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
An operational amplifier circuit comprises a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R33, a resistor R9, a resistor R10, a capacitor C31, a capacitor C3, a capacitor C4, an amplifier chip U19.1, an amplifier chip U19.2, a VOUT+ terminal, a VOUT-terminal and a 2.5V voltage terminal;
the positive power supply pin of the amplifier chip U19.1 is grounded, the positive power supply pin of the amplifier chip U19.1 is respectively connected with one end of a resistor R33 and one end of a capacitor C31, the other end of the resistor R33 is connected with a VCC end, the other end of the capacitor C31 is grounded, the other end of the resistor R5 is respectively connected with the output end of the amplifier chip U19.1 and one end of the resistor R9, the other end of the resistor R9 is respectively connected with one end of the capacitor C3 and one end of the amplifier chip U19.2, the negative input pin of the amplifier chip U19.2 is respectively connected with the output end of the resistor R10, the other end of the capacitor C3 is grounded, and the other end of the resistor C10 is respectively connected with the other end of the capacitor C4 and the other end of the capacitor C4.
Preferably, the resistance of the resistor R4 and the resistor R5 is 1 kilo-ohm.
Preferably, the resistance values of the resistor R5, the resistor R7 and the resistor R33 are 100 kilo ohms.
Preferably, the resistance of the resistor R9 and the resistor R10 is 10 kilo ohms.
Preferably, the capacitance value of the capacitor C3 is 100nF.
The utility model relates to an operational amplifier circuit which comprises a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R33, a resistor R9, a resistor R10, a capacitor C31, a capacitor C3, a capacitor C4, an amplifier chip U19.1 and an amplifier chip U19.2, wherein a double amplification structure is designed in a sampling way, the conversion rate of an amplifier is obviously improved, the design is ingenious, the popularization is worth, the circuit structure can be simplified, and the circuit cost is reduced.
While certain exemplary embodiments of the present utility model have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the utility model, which is defined by the appended claims.
Claims (5)
1. An operational amplifier circuit, characterized by: the resistor comprises a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R33, a resistor R9, a resistor R10, a capacitor C31, a capacitor C3, a capacitor C4, an amplifier chip U19.1, an amplifier chip U19.2, a VOUT+ terminal, a VOUT-terminal and a 2.5V voltage terminal;
the positive power supply pin of the amplifier chip U19.1 is grounded, the positive power supply pin of the amplifier chip U19.1 is respectively connected with one end of a resistor R33 and one end of a capacitor C31, the other end of the resistor R33 is connected with a VCC end, the other end of the capacitor C31 is grounded, the other end of the resistor R5 is respectively connected with the output end of the amplifier chip U19.1 and one end of the resistor R9, the other end of the resistor R9 is respectively connected with one end of the capacitor C3 and one end of the amplifier chip U19.2, the negative input pin of the amplifier chip U19.2 is respectively connected with the output end of the resistor R10, the other end of the capacitor C3 is grounded, and the other end of the resistor C10 is respectively connected with the other end of the capacitor C4 and the other end of the capacitor C4.
2. An operational amplifier circuit according to claim 1, wherein: the resistance value of the resistor R4 and the resistor R5 is 1 kiloohm.
3. An operational amplifier circuit according to claim 1, wherein: the resistance values of the resistor R5, the resistor R7 and the resistor R33 are 100 kiloohms.
4. An operational amplifier circuit according to claim 1, wherein: the resistance of the resistor R9 and the resistor R10 is 10 kilo ohms.
5. An operational amplifier circuit according to claim 1, wherein: the capacitance value of the capacitor C3 is 100nF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320053150.3U CN219124178U (en) | 2023-01-09 | 2023-01-09 | Operational amplifier circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320053150.3U CN219124178U (en) | 2023-01-09 | 2023-01-09 | Operational amplifier circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219124178U true CN219124178U (en) | 2023-06-02 |
Family
ID=86530133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320053150.3U Active CN219124178U (en) | 2023-01-09 | 2023-01-09 | Operational amplifier circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219124178U (en) |
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2023
- 2023-01-09 CN CN202320053150.3U patent/CN219124178U/en active Active
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