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:
Feb. 07, 1995
Filed:
May. 20, 1993
Hideki Ueda, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A quadrature modulation circuit of the present invention has a phase shifter whose shifting amount is fixed at 90 degrees, a minute amount-phase shifter whose shifting amount is variable, a detector for detecting a RF signal supplied from the quadrature modulation circuit by a direct voltage signal, and a control circuit for generating a control signal in accordance with a direct voltage signal from the detector. Phase shifting amount of the minute amount-phase shifter is adjusted by the control signal whereby a total amount of the phase shifting is maintained at 90 degrees.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile