Patent attributes
In accordance with an embodiment, a radio frequency (RF) amplifier circuit includes a switchable capacitance circuit having a first terminal configured to be coupled to an input matching inductor. The switchable capacitance circuit is configured to provide a short circuit between the first and second terminals in a first state, and provide a first capacitive impedance between the first and second terminals in a second state. The RF amplifier also includes a low noise amplifier (LNA) having an input terminal coupled to the second terminal of the switchable capacitance circuit; and a bypass switch coupled to an output of the LNA, the second terminal of the switchable capacitance circuit, and an output of the RF amplifier circuit. The bypass switch is configured to select the output of LNA in the first state, and select the second terminal of the switchable capacitance circuit in the second state.
