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:
Feb. 24, 2015
Filed:
Aug. 23, 2011
Niels-henrik Lai Hansen, Frederiksberg, DK;
Mikkel Christian W. Hoyerby, Kobenhavn SV, DK;
Niels-Henrik Lai Hansen, Frederiksberg, DK;
Mikkel Christian W. Hoyerby, Kobenhavn SV, DK;
Motorola Solutions, Inc., Schaumburg, IL (US);
Abstract
A linear transmitter includes a closed loop feedback path to maintain linearity of a power amplifier subsystem. The closed loop feedback path provides RF injection of one or more reference RF carrier signals () combined with a radio frequency (RF) feedback signal () to generate a feedback RF error signal (). A narrowband receiver () continuously monitors stability of the feedback RF error signal (). A loop phase adjusting circuit () generates phase adjustments () to compensate for instabilities in the closed loop feedback path thereby maintaining stability of the PA RF output signal ().