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:
May. 29, 1990
Filed:
Jan. 23, 1989
Applicant:
Inventors:
Kenneth G Voyce, Bellevue, WA (US);
Jay H McCandless, Issaquah, WA (US);
Assignee:
The Boeing Company, Seattle, WA (US);
Primary Examiner:
Int. Cl.
CPC ...
H03F / ; H03C / ;
U.S. Cl.
CPC ...
330149 ; 332162 ;
Abstract
A feedback linearization technique for a power amplifier that does not require the availability of the modulation signals. The RF input signal is down converted to a first IF signal. A portion of the amplifier RF output signal is used to form a feedback signal that is down converted to produce a second IF signal that is subtracted from the first IF signal to produce a different signal. The difference signal is filtered and amplified, and then up converted to RF for input to the power amplifier. Use of feedback at IF avoids stability problems inherent in RF feedback techniques.