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:
May. 06, 2008
Filed:
Jul. 08, 2005
Applicant:
Hwa-yeal Yu, Bucheon-si, KR;
Inventor:
Hwa-Yeal Yu, Bucheon-si, KR;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03L 7/193 (2006.01); H03M 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A fractional-N frequency synthesizer supporting multi-band operation, having variable frequency resolution obtained by sigma-delta modulating a multi-bit frequency resolution control signal having at least one pulse, the at least one pulse having a period of P and a variable duty cycle. Frequency resolution can be increased by changing the duty cycle and without increasing input bits to the sigma-delta modulator. Thus, a core size of the sigma-delta modulator may be reduced.