Operational Amplifier Circuit

A technology of operational amplifiers and amplifiers, applied in amplifiers, differential amplifiers, DC-coupled DC amplifiers, etc., can solve the problems of decreased anti-power interference ability, decreased steady-state accuracy of operational amplifiers, and increased system errors, achieving high PSRR, The effect of high gain and accelerated charge and discharge speed
CN108494377BActive Publication Date: 2022-02-01BRIGATES MICROELECTRONICS KUNSHAN
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BRIGATES MICROELECTRONICS KUNSHAN
Publication Date
2022-02-01

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Abstract

An operational amplifier circuit, comprising: a loop folded cascode amplifier, the loop folded cascode amplifier includes two folded tubes, a cascode current mirror and a load capacitor, the cascode current mirror The gates are connected correspondingly, each branch of the cascode current mirror and each of the two folded tubes are respectively connected in series with the first node and the second node, and one end of the load capacitor is connected to the first node, The other end is grounded; it also includes: a dynamic acceleration circuit, which is suitable for making the The output voltage of the operational amplifier circuit accelerates to follow the input voltage. In the operational amplifier circuit provided by the present invention, by adding the dynamic acceleration circuit, the driving speed of the operational amplifier circuit is greatly improved without increasing the static power consumption.
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Description

technical field

[0001] The invention relates to the technical field of integrated circuits, in particular to an operational amplifier circuit. Background technique

[0002] Operational amplifiers have extremely extensive and important applications in the field of integrated circuits. Operational amplifiers with different structures have their own advantages and disadvantages, so their applicable fields are also different. One of the most common cases is that the operational amplifier needs to drive a large capacitive load, and with the continuous development of various electronic devices, the load capacitance of the operational amplifier in the corresponding integrated circuit design is getting larger and larger, but the speed is required to be higher. The higher the increase, the higher the static power consumption of the op amp and the larger the chip area. For an operational amplifier, an increase in static power consumption means a decrease in gain. The decrease in gai...

Claims

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