Biasing circuit applied to 5G WiFi communication low-noise amplifier and amplifier circuit

Abstract

The invention relates to the technical field of integrated circuits, and discloses a biasing circuit applied to a 5G WiFi communication low-noise amplifier and an amplifier circuit. The amplifier circuit can be divided into two modes, one mode is a main path mode, and the other mode is a bypass mode. The biasing circuit comprises a bypass and switch tube biasing circuit and a cascode biasing circuit, the bypass and switch tube biasing circuit provides bias voltage for a switch tube and a bypass of the amplifier circuit, the switch tube is turned on or turned off by adjusting the bias voltage,and the switch tube is turned on or turned off to enable the amplifier circuit to select a main circuit mode or a bypass mode. The cascode biasing circuit provides bias voltage for the cascode tube and the cascode tube of the main circuit. The biasing circuit is further provided with a voltage dividing and stabilizing circuit, and the voltage stabilizing function is achieved. A temperature compensation circuit is arranged to realize a temperature compensation function; the low-end stability of the amplifier can be improved, and the gain flatness of the amplifier is well influenced. The biasingcircuit is simple in structure and beneficial to miniaturization design.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to bias circuits and amplifier circuits applied to 5G WiFi communication low-noise amplifiers. Background technique [0002] Since MMIC is called a monolithic microwave integrated circuit, it should have the dual advantages of monolithic and integrated, so the bias circuit should also be monolithic. The bias circuit is an important part of the MMIC. Choose a suitable bias network It is also the key to circuit design. [0003] One of the great advantages of the monolithic circuit is that the bias circuit of the active device is integrated with the active device, which not only greatly reduces the size of the circuit and is convenient to use, but more importantly, the protection function of the bias circuit is controlled by an external The protection of the circuit becomes the protection of the circuit itself, which greatly improves the reliability of the circuit device. ...

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is: in order to meet the requirements of the bias circuit for stability and temperature characteristics, a low-noise amplifier for 5G WiFi communication is provided Bias circuit, amplifier circuit

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