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:
Aug. 09, 1994
Filed:
Mar. 12, 1993
Earl A Daughtry, Lawrenceville, GA (US);
Richard M Stone, Duluth, GA (US);
Matsushita Communication Industrial Corporation of America, Peachtree City, GA (US);
Abstract
An automatic level control circuit for radio frequency power amplifiers which is immune to temperature and power supply induced variations. The level control circuit (42) employs a detector/comparator comprising a matched transistor pair (55) operating as a detecting differential amplifier to compare a reference signal (63) to the output power signal (83). A second amplifier (60) receives the differential output signals from the detecting amplifier and provides a power level control signal (97) to the power amplifier, thereby causing the power amplifier to produce the desired output power level.