Patent ID: 11876494
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A power amplifier, comprising:
a power transistor, configured to amplify an input radio frequency (RF) signal;
a bias circuit, configured to supply a bias current to the power transistor; and
an overvoltage protection circuit, configured to detect a power voltage supplied to the power transistor, and sink a first current from a terminal of the bias circuit corresponding to the power voltage, and
the overvoltage protection circuit comprises:
a first transistor, comprising a first terminal connected to the power voltage, and configured to output a first voltage corresponding to the power voltage to a second terminal of the first transistor, and
a second transistor, comprising a control terminal connected to the second terminal of the first transistor, and a first terminal connected to the terminal of the bias circuit,
wherein the second transistor is configured to sink the first current corresponding to the first voltage.