Patent ID: 9252715
Filing Date: 2016-02-02
CPC Classification: H03F

Claim Text:
1. A variable-bias power amplifier, comprising: a first variable voltage source configured to generate a first bias voltage based on at least one of two or more bias voltage control signals; a first amplifier circuit configured to amplify an output RF signal to generate a first amplified signal based on the one or more first bias voltages; a second variable voltage source configured to generate a second bias voltage based on at least one of the two or more bias voltage control signals; a second amplifier circuit configured to amplify the output RF signal to generate a second amplified signal based on the one or more second bias voltages; and a first DC isolation circuit located between the first amplifier circuit and the second amplifier circuit, the first DC isolation circuit being configured to electrically isolate DC currents at the first amplifier circuit from DC currents at the second amplifier circuit, wherein the first variable voltage source can be controlled independently from the second variable voltage source, the first amplifier circuit, the second amplifier circuit, and the first DC isolation circuit are all formed on a single die.