An Operational Transconductance Amplifier with Low Power Consumption, High Gain and High Slew Rate

Abstract

Provided is an operation transconductance amplifier with low power losses, high gain and a high slew rate. On the basis of a basic structure, with an input stage, an output stage and a load capacitor CL, of the operation transconductance amplifier, a self-adaptive bias circuit, a current detecting circuit, a difference current reallocating circuit and a dynamic output drive and control circuit are additionally arranged, the self-adaptive bias circuit is controlled by difference input signals, the currents generated by the self-adaptive bias circuit are detected through the current detecting circuit, the small signal current difference of a load is increased through the difference current reallocating circuit to improve the equivalent transconductance of the operation transconductance amplifier, the detected currents are collected by the dynamic output drive and control circuit, the currents at the output end are controlled dynamically, the comprehensive improvement of the slew rate of the operation transconductance amplifier is achieved, the contradiction between the speed and the precision which cannot be regulated by an ordinary operation transconductance amplifier is overcome thoroughly, and the comprehensive improvement of a circuit on the static performance and the dynamic performance is achieved.

Description

technical field [0001] The invention relates to an operational transconductance amplifier, in particular to an operational transconductance amplifier with low power consumption, high gain and high slew rate, and belongs to the technical field of analog integrated operational transconductance amplifiers. Background technique [0002] In recent years, there are more and more types of electronic products, and people have higher and higher requirements for their performance, especially semiconductor integrated circuit products, which requires us to conduct research on the internal circuit structure and device materials of such products , and the operational amplifier circuit is the most important thing in circuit research. The operational amplifier is one of the most important modules of many analog circuits, and is widely used in analog signal processing circuits such as analog-to-digital conversion circuits and filters. [0003] In the application of audio and video signal acq...

AI Technical Summary

Problems solved by technology

The size of the gain can be achieved by cascading multi-stage operational transconductance amplifiers, but multi-stage operational transconductance amplifiers will introduce additional zero-order points, which will affect the stability of the system. In the amplifier, the gain of the operational transconductance amplifier is fully improved

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