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. 27, 2000
Filed:
Apr. 15, 1998
Hidehiko Norimatsu, Tokyo, JP;
NEC Corporation, , JP;
Abstract
In a portable apparatus in a digital cellular system in which transmission and reception is simultaneously conducted in a particularly wide variable output range, efficiency is improved in a low-power output operation and there is minimized the influence upon discontinuous output waveforms appearing in a gain changing operation. There are included a distributor to distribute an input signal to two paths, a first gain control amplifier, a linear power amplifier, a driver amplifier, a filter, a switching circuit to turn power of the linear power amplifier on and off, and a second gain control amplifier. Outputs from the linear power and gain control amplifiers are mixed with each other by a mixer. Gains of these amplifiers are separately controlled by a control circuit, which also controls on and off of the switching circuit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile