Patent ID: 11936416
Assignee: SKYWORKS SOLUTIONS, INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A mobile device comprising:
a transceiver configured to generate a radio frequency input signal; and
a front end system including a cascode power amplifier that includes a gain field-effect transistor having a gate configured to receive the radio frequency input signal for amplification, a first cascode field-effect transistor connected in series with the gain field-effect transistor, and a bias field-effect transistor connected to the gate of the gain field-effect transistor to form an input current mirror, the front end system further including a bias voltage generator configured to generate a plurality of selectable bias voltages, a bias voltage selector configured to bias a gate of the first cascode field-effect transistor with a first cascode bias voltage selected from amongst the plurality of selectable bias voltages, and a bias current generator configured to provide the input current mirror with a reference current chosen from a plurality of reference currents.