The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 2026
Filed:
Sep. 17, 2023
Smarter Microelectronics (Guang Zhou) Co., Ltd., Guangzhou, CN;
Yangyang Peng, Guangzhou, CN;
Yang Hou, Guangzhou, CN;
SMARTER MICROELECTRONICS (GUANG ZHOU) CO., LTD., Guangzhou, CN;
Abstract
A protection circuit for the power amplifier includes a detection circuit, a controller and an input impedance adjustment circuit. The detection circuit is provided with an input end connected to the power amplifier and an output end connected to an input end of the controller, and is configured to detect an operation electrical signal of the power amplifier and generate a trigger electrical signal. The controller is configured to generate a first control signal and a second control signal, the first control signal is configured to control a bias current or bias voltage of the power amplifier to reduce or recover a gain of the power amplifier, and the second control signal is configured to adjust characteristic parameters of the input impedance adjustment circuit. The input impedance adjustment circuit is configured to decrease or increase input power of the power amplifier in response to the second control signal.