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. 31, 1992
Filed:
Jan. 10, 1991
Edward C DuFort, Fullerton, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
A closed loop RF power amplifier output correction circuit is disclosed, for providing closed loop continuous amplitude and phase correction of solid state amplifiers. The circuit includes a two channel RF solid state high power amplifier whose inputs are fed through two control phase shifters and whose outputs are combined in a hybrid junction. A reference signal is provided, which the power amplifier must duplicate in amplitude and phase. A coupling and comparision circuit compares the reference signal and the amplifier output signal and provides an error signal representative of error power. Digital circuitry is provided which takes only relative error power measurements and nulls the error by adjusting the control phase shifters in a closed loop.