Differential input circuit and amplifier circuit, display device

Abstract

The present disclosure relates to a differential input circuit, an amplifying circuit, and a display device. The differential input circuit includes: a first power supply module, a second power supply module, a first shunt module, a second shunt module, a first output module and a second Output module: control the first power module to output the first signal, the second signal and the third signal through the first bias signal, the second power module receives the first signal, and outputs the fourth signal and the fifth signal, through the differential input signal Control the first shunt module, the second shunt module, the first output module and the second output module, so that when the differential input signal changes, the transconductance of the differential input circuit is constant, and because the first shunt module, the second shunt module, the second Both the first output module and the second output module are controlled by differential input signals, and the number of control signals is small, so that the circuit control is simple and easy to realize, the manufacturing process is simplified, and the cost is saved.

Description

technical field [0001] The present disclosure relates to the technical field of analog circuits, in particular, to a differential input circuit, an amplification circuit, and a display device. Background technique [0002] With the development and progress of technology, amplifiers are more and more widely used in analog circuits. In rail-to-rail amplifiers, the transconductance of the differential input circuit is related to the differential input voltage. If the transconductance varies too much with the differential input voltage It will cause output distortion, so it is necessary to ensure that the transconductance remains constant within the common-mode input voltage range value. [0003] At present, a large number of transistors are used in the differential input circuit with constant transconductance, and a large number of transistors need to be controlled by different control signals. In order to ensure the accuracy of the output current, the accuracy of the control s...

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Problems solved by technology

[0003] At present, a large number of transistors are used in the differential input circuit with constant transconductance, and a large number of transistors need to be controlled by different control signals. In order to ensure the accuracy of the output current, the accuracy of the control signals of the transistors is high. The control signal is difficult to generate in the circuit, which makes the circuit control difficult and the manufacturing process is complicated

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