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:
Dec. 10, 2013
Filed:
Dec. 02, 2011
Baker Scott, San Jose, CA (US);
George Maxim, Milpitas, CA (US);
Stephen Franck, Felton, CA (US);
Chu Hsiung Ho, Milpitas, CA (US);
Baker Scott, San Jose, CA (US);
George Maxim, Milpitas, CA (US);
Stephen Franck, Felton, CA (US);
Chu Hsiung Ho, Milpitas, CA (US);
RF Micro Devices (Cayman Islands), Ltd., Greensboro, NC (US);
Abstract
Achievement of robust stability of a power amplifier (PA) that allows the sharing of the ground between the driver stages and the output stage is shown. A controlled amount of negative feedback is used to neutralize the local positive feedback that results from the driver-to-output stage ground sharing in the signal path, for example, a radio frequency (RF) signal path. The solution keeps a strong drive and a good performance of the PA. Exemplary embodiments are shown for the PA positive feedback neutralization. A first embodiment uses a ground signal divider while another embodiment uses a ground signal divider weighting technique.