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. 22, 2001
Filed:
Mar. 31, 1999
Applicant:
Inventor:
Thomas A. D. Riley, Osgoode, CA;
Assignee:
Philsar Semiconductor Inc., Ontario, CA;
Primary Examiner:
Int. Cl.
CPC ...
H03K 2/100 ;
U.S. Cl.
CPC ...
H03K 2/100 ;
Abstract
A delta-sigma modulator having a dead-zone quantizer and an error shaping digital filter clocked by a signal which is periodic at the frequency of the reference. A dead-zone quantizer provides quantization of a high resolution digital word to a low resolution digital word with three or a higher odd number of possible output levels and with an output of zero for an input near the center of the normal input range. The delta-sigma modulator is used in a fractional-N divider. The fractional-N divider is used in a fractional-N frequency synthesizer.