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:
Dec. 22, 1998
Filed:
Sep. 19, 1995
Hideki Kasamatsu, Hirakata, JP;
Sanyo Electric Co., Ltd., Moriguchi, JP;
Abstract
A device for controlling the signal output of transmission equipment, which includes a power amplifier circuit for amplifying an inputted transmission signal by an amplification factor decided by an applied first control voltage, a coupler for monitoring the transmission signal amplified by the power amplifier circuit, a variable gain amplifier for amplifying the monitoring signal by an amplification factor decided by an applied second control voltage, a detection circuit for detecting a output signal of the variable gain amplifier and generating a detection voltage, a differential amplifier for comparing the detection voltage and a supplied reference voltage and amplifying the difference to generate a first control signal, and a control circuit for generating the reference voltage and the second control voltage, so that when the radio output is controlled, the gain of the variable gain amplifier is adjusted by the control circuit so that the level of the monitoring signal falls within the range for which detection by the detection means is possible.