Patent ID: 11942910
Assignee: SKYWORKS SOLUTIONS, INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A mobile device comprising:
a transceiver configured to generate a radio frequency signal;
an antenna configured to transmit an amplified radio frequency signal; and
a front end system including a power amplifier configured to amplify the radio frequency signal to generate the amplified radio frequency signal, the power amplifier including a bipolar transistor having a base that receives the radio frequency signal and a base bias signal, and an inductor configured to provide a power amplifier supply voltage to a collector of the bipolar transistor, the front end system further including a power amplifier bias control circuit configured to generate the base bias signal of the power amplifier based on a bandwidth signal indicating a bandwidth of the radio frequency signal, the power amplifier bias control circuit having a bandwidth that adapts to the bandwidth of the radio frequency signal as indicated by the bandwidth signal, the power amplifier bias control circuit including a bias circuit configured to generate a bias input signal, and a controllable filter configured to generate the base bias signal of the power amplifier based on filtering the bias input signal.