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:
Jun. 04, 1996
Filed:
Oct. 13, 1994
John R Grebliunas, Manhattan Beach, CA (US);
Arnold L Berman, Los Angeles, CA (US);
David L Crampton, Long Beach, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
A predistortion linearizer (10) and method for distorting an AC input signal (42) to a power amplifier (24) provide a distortion to the input signal which is complementary to a distortion, in terms of gain and phase, introduced by the power amplifier as a function of signal amplitude, thereby to linearize the power amplifier. The linearizer includes a switching circuit (26, Z.sub.1 28, Z.sub.2) having an input terminal (16) and an output terminal (20) and a pair of antiparallel diodes (26, 28) connected between the input terminal and the output terminal of the switching circuit. The linearizer has also an impedance circuit (Z.sub.3) comprising solely passive electrical elements connected between the input terminal and the output terminal of the switching circuit, wherein elements of the impedance circuit have values selected to introduce the complementary distortion to the input signal as a function of amplitude of the input signal to linearize the power amplifier.