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. 29, 1992
Filed:
Jan. 12, 1990
Tadashi Yasuoka, Kodaira, JP;
Citizen Watch Co., Ltd., Nishi-Shinjuku, JP;
Abstract
A transmitter/receiver apparatus includes a transmitter and a receiver. The transmitter includes an intermittent signal generator and an intermittent modulator. The intermittent signal generator generates an intermittent signal. The intermittent modulator outputs an intermittent modulated signal, as a radio signal, which is obtained by intermittently modulating a carrier on the basis of the intermittent signal. The receiver includes a synchronization determining circuit and a synchronization detector. The synchronization determining circuit has a receiving circuit for receiving the radio signal from the transmitter and outputting a demodulated signal and is designed to detect the presence/absence of the demodulated signal and output a determining signal. The synchronization detector generates an intermittent sync signal having the same period as that of the intermittent signal from the transmitter, and performs a synchronization detecting operation with respect to the intermittent signal from the transmitter on the basis of the intermittent sync signal and the determining signal from the synchronization determining circuit. The intermittent signal generator of the transmitter generates intermittent signals having intervals which cyclically change.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile