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:
Apr. 08, 2003
Filed:
Jan. 19, 1999
Applicant:
Inventor:
Kazuo Kawai, Tokyo, JP;
Assignee:
General Research of Electronics, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 2/712 ;
U.S. Cl.
CPC ...
H04L 2/712 ;
Abstract
A direct modulating frequency shift keying transmitter for multi channel access is constructed so that a transmission signal from a voltage controlled oscillator (VCO) in a phase lock loop frequency synthesizer is output through a buffer amplifier and a transmitting power amplifier, and a modulation signal is applied to the VCO. In the transmitter, in order to cancel instantaneous deviation of a transmission frequency due to ON of the transmitting power amplifier, an ON/OFF control signal is applied to the transmitting power amplifier.