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:
Aug. 15, 1995
Filed:
Nov. 06, 1992
Shin Saito, Tokyo, JP;
Sony Corporation, , JP;
Abstract
A signal transmitting and receiving apparatus includes a transmitting circuit block which has a carrier signal supplying portion for supplying first and second carrier signals having the same frequency and a relative phase angle difference of substantially ninety degrees to be used for producing a transmissible digital phase-modulated signal. A receiving circuit block in which received digital data are obtained is based on a received digital phase-modulated signal, wherein the carrier signal supplying portion comprises a carrier signal generator for generating an additional carrier signal having a frequency twice as high as the frequency of each of the first and second carrier signals. A first flip-flop circuit produces the first carrier signal based on the additional carrier signal. A second flip-flop circuit produces the second carrier signal based on the additional carrier signal having been phase-inverted. A control unit causes the first and second flip-flop circuits to be operative when the signal transmitting operation is performed in the transmitting circuit block and to be inoperative when the signal receiving operation is performed in the receiving circuit block.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile