PUSH-PULL LOW NOISE AMPLIFIER WITH VARIABLE GAIN, PUSH-PULL LOW NOISE AMPLIFIER WITH COMMON GATE BIAS CIRCUIT AND AMPLIFIER WITH AUXILIARY MATCHING

摘要

A push-pull low noise amplifier (LNA) includes at least one amplifier block. Each amplifier block includes a bypass stage and at least one gain cell. The bypass stage has a first node and a second node. The gain cell has an input terminal and an output terminal, comprising a loading stage and a driving stage. When the push-pull LNA is in a first gain mode, the loading stage is enabled and the bypassing stage is disabled; and when the push-pull LNA is in a second gain mode, the loading stage is disabled and the bypassing stage is enabled.