Inductance-free broadband low-noise amplifier with low power consumption, high gain and high linearity

Abstract

An inductance-free broadband low-noise amplifier with low power consumption, a high gain and high linearity is equipped with an amplification unit, a multiplexing unit, a cascading unit, a load unit, an input matching feedback unit, a current mirror unit and an inverted isolation output matching unit, wherein a radio frequency input signal is connected to the amplification unit; output of the amplification unit is connected to the multiplexing unit and the cascading unit; output of the cascading unit is connected to the load unit, the input matching feedback unit and the inverted isolation output matching unit; output of the input matching feedback unit is connected to the current mirror unit and is also in feedback connection to the amplification unit; and the inverted isolation output matching unit outputs radio frequency output signals.

Description

technical field [0001] The invention relates to a low-noise amplifier in a radio frequency receiver system, in particular to a low-noise amplifier with no inductance, low power consumption, high gain, high linearity and broadband. Background technique [0002] The low noise amplifier is the first stage active circuit in the wireless receiver, it should have very low noise itself and provide enough gain to suppress the noise of the subsequent circuit. When designing, you need to face various design index requirements, such as: smaller chip area, low noise, low power consumption, high gain, high linearity and wide bandwidth. Due to the inherent contradictions among some design indicators, such as low noise and high linearity, it is often difficult to give consideration to all of them during design, and a compromise or some technical means are required. [0003] Active resistance negative feedback structure amplifiers usually occupy a small chip area because they do not use or...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of the traditional two-stage cascaded structure active resistance negative feedback low noise amplifier, to provide a low noise amplifier with low power consumption, high gain, high linearity and wideband without inductance, which can guarantee the broadband characteristics On, reduce the power consumption and noise of the amplifier, improve the gain, isolation and linearity of the amplifier

Images