Patent ID: 7167044

Claim:
A multi-band low noise amplifier (LNA), comprising: an input stage including at least two inputs, a first input coupled to a first input transistor for receiving signals in a first frequency band and a second input coupled to a second input transistor for receiving signals in a second frequency band, drains of said first and second input transistor being both connected at a common node, said second frequency band spaced apart from said first frequency band, a bias network having a band select input coupled to said first and second input transistor, wherein a signal level applied to said band select input turns on one of said input transistors and turns off one of said input transistors, said LNA operating in said first frequency band when said first input transistor is on and said second frequency band when said second input transistor is on, and a switched resonator comprising at least one inductor having a control input coupled thereto, said switched resonator disposed in series between a power supply node and said common node, wherein application of a control signal to said control input tunes a resonant frequency of said LNA, for operation in either said first or said second frequency band.