Low-power-consumption broad-band current differential circuit

Abstract

The invention discloses a low-power-consumption broad-band current differential circuit. The circuit comprises a first current input stage circuit, a second current input stage circuit and a current output stage circuit, wherein the current output stage circuit is connected with the first current input stage circuit and the second current input stage circuit, and the first current input stage circuit is connected with the second current input stage circuit. The current output stage circuit adopts a cascode current mirror structure, the structure has high output impedance and can effectively reduce influence of the length modulation effect of a current mirror MOS (metal oxide semiconductor) transistor channel, and the current transmission bandwidth is increased while the current transmission accuracy is guaranteed. The low-power-consumption broad-band current differential circuit can be widely applied to the field of radio frequency integrated circ.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a broadband low power consumption current differential circuit. Background technique [0002] With the rapid development of system integration technology, current mode circuits are widely used due to their advantages of wide bandwidth and low power consumption. The current differential circuit is the basic circuit of many current mode building block modules, and the performance of the current differential circuit directly affects the circuit performance of the building block module. The traditional current differential circuit is mostly composed of basic current source and current mirror. The basic current source and current mirror are affected by the channel length modulation effect. In practical applications, in order to ensure the transmission accuracy of the transmission current, increasing the channel length of the MOS transistor can Improve the accuracy of curr...

AI Technical Summary

Problems solved by technology

The traditional current differential circuit is mostly composed of basic current source and current mirror. The basic current source and current mirror are affected by the channel length modulation effect. In practical applications, in order to ensure the transmission accuracy of the transmission current, increasing the channel length of the MOS transistor can Improve the accuracy of current transmission, but it will increase the capacitance of the MOS transistor node and reduce the application frequency of current source and current mirror

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