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:
Mar. 25, 2003
Filed:
Nov. 15, 1999
Yoshikazu Kakura, Tokyo, JP;
Tomoki Osawa, Tokyo, JP;
NEC Corporation, , JP;
Abstract
A clock synchronizing circuit enables initial synchronization of clock in spite of the case of modulation system except for quadrature modulation with simple constitution. A cosine/sine output circuit inputs thereto an integration clock 'ICLK', a sampling signal 'SSAMP', a sign switching signal ‘SPM’, a cosine component integration signal ‘SCCI’, and a sine component integration signal, before obtaining a cosine signal ‘SCOS’ corresponding to a cosine component of initial phase of a symbol clock and a sine signal ‘SSIN’ corresponding to a sine component thereof. An angular detector inputs thereto the cosine signal ‘SCOS’ and the sine signal ‘SSIN’, before obtaining initial phase of the symbol clock ‘SCLK’.