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. 21, 2009
Filed:
May. 26, 2005
Masayuki Katakura, Kanagawa, JP;
Masayuki Katakura, Kanagawa, JP;
Sony Corporation, , JP;
Abstract
A phase-locked circuit comprises a complex signal processor and a feedback portion wherein the complex signal processor: receives as an input a first complex signal composed of a real part component and an imaginary part component; generates a second complex signal composed of a first signal component and a second signal component and having a second frequency in accordance with a feedback control signal input from the feedback portion; and generates a signal in accordance with a declination of a third complex signal obtained by multiplying the first complex signal with the second complex signal and outputs to the feedback portion. The feedback portion generates the feedback control signal in accordance with a signal input from the complex signal processor, so that the declination converges to a constant value; and the complex signal processor synchronizes a phase of the second complex signal with the first complex signal and outputs.