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

Claim 18:
19. A transmission device, comprising:
a power amplifier, configured to amplify a radio frequency (RF) signal, the power amplifier comprising:
an overvoltage protection circuit;
a power transistor, configured to amplify power with respect to the RF signal; and
a bias circuit, configured to supply a bias current to the power transistor;
wherein the overvoltage protection circuit comprises:
a first transistor, connected to a terminal of the bias circuit, and configured to sink a current received from the terminal of the bias circuit;
a second transistor, comprising an emitter connected to a base of the first transistor, and a base connected to a reference voltage, and
a third transistor, comprising an emitter connected to a collector of the second transistor, and a collector connected to a power supply voltage.