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:
Mar. 10, 2020
Filed:
Dec. 11, 2018
Psemi Corporation, San Diego, CA (US);
Damian Costa, San Diego, CA (US);
Chih-Chieh Cheng, Poway, CA (US);
Tero Tapio Ranta, San Diego, CA (US);
pSemi Corporation, San Diego, CA (US);
Abstract
Methods and devices for providing a feedback network in a multi-stage power amplifier are described. According to one aspect, a final amplifier of the multi-stage power amplifier is a cascode amplifier. The feedback network is placed between an output of the final amplifier and an output of a driver amplifier. The feedback network can decrease a mismatch between the output impedance of the final amplifier and a load presented to the final amplifier. In addition, the feedback network can change a load presented to the driver amplifier and thereby allow the transfer functions of each stage to be tuned so that the overall transfer function of the multi-stage amplifier becomes more linear.