Patent ID: 11881828
Assignee: PSEMI CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A multi-gain low noise amplifier (LNA), comprising:
a cascode arrangement comprising an input transistor and an output cascode transistor; and
a tunable degeneration network having a first terminal connected to a source of the input transistor and a second terminal connected to a reference ground, the tunable degeneration network comprising:
a fixed inductance inductor connected between the first terminal and the second terminal; and
a first switchable shunting network connected between the first terminal and the second terminal, the first switchable shunting network comprising:
a first switch in series connection with a first capacitor, wherein the first capacitor has a capacitance so that at a frequency band of operation of the multi-gain LNA, a parallel combination of the fixed inductance inductor and the first capacitor results in a first parallel combined inductive impedance that is larger than an inductive impedance of the fixed inductance inductor.