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:
Nov. 27, 2007
Filed:
Mar. 10, 2006
Ezmarai Arbab, Laguna Niguel, CA (US);
Mark Gurvich, Costa Mesa, CA (US);
Matthew J. Hunton, Liberty Lake, WA (US);
Alexander Rabinovich, Cypress, CA (US);
Bill Vassilakis, Orange, CA (US);
Ezmarai Arbab, Laguna Niguel, CA (US);
Mark Gurvich, Costa Mesa, CA (US);
Matthew J. Hunton, Liberty Lake, WA (US);
Alexander Rabinovich, Cypress, CA (US);
Bill Vassilakis, Orange, CA (US);
Powerwave Technologies, Inc., Santa Ana, CA (US);
Abstract
A delay mismatched feed forward power amplifier is disclosed. Loopincludes a main amplifier and is used to derive a carrier cancelled sample of the main amplifier output. Loopincludes an error amplifier used to amplify the carrier cancelled signal derived from Loopoperation in order to cancel distortion products generated due to the nonlinear nature of the main amplifier. Loopalso utilizes a very short Loopdelay line. A significant efficiency gain is provided due to reduced output power losses associated with the Loopdelay line. Lower output losses also results in lower distortion levels produced by the main amplifier. This, in turn, reduces the size and performance requirements placed on the error amplifier. A smaller and more efficient error amplifier is employed resulting in further amplifier system efficiency improvement. The delay mismatch is compensated by a third control loop, a special adaptive control algorithm or a combination thereof.