Patent ID: 8427240
Filing Date: 2013-04-23
Classification: H03F,H03G

Abstract:
1. A low-noise amplifier (“LNA”), comprising: a first cascode gain stage including a first complementary metal oxide semiconductor (“CMOS”) transistor configured to receive a radio frequency (“RF”) input signal and a second CMOS transistor coupled to an output node; a first inductive gate network coupled to a gate of the second CMOS transistor for increasing a gain of the first cascode gain stage, the first inductive gate network having a non-zero inductive input impedance and including at least one passive circuit element; a second cascode gain stage coupled to the first cascode gain stage; and a first variable gain network coupled to a gate of a first transistor of the second cascode gain stage that is coupled to a second transistor of the second cascode gain stage, the first variable gain network including