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. 09, 1997
Filed:
Feb. 20, 1996
Takayuki Shibata, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In order to realize control of a transmission signal level from a radio transmitter of TDMA (Time Division Multiplex System) with a simplified arrangement and with a high precision, a control circuit 9 outputs a transmission signal for each time slot and a level designation signal. A level control signal generator circuit 4 generates a level control signal in response to the level designation signal and outputs the level control signal through D/A converter 5 to a level control circuit 2. The level of the modulated transmission signal is controlled by the level control circuit 2 and is amplified by a RF amplifier circuit 3 thereby being output outside. The output level is detected by a detector circuit 8 and fedback through A/D converter 7 and a detection characteristic storage circuit 8 to level control signal generator circuit 4 so that the value of the level control signal is corrected.