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. 20, 2012
Filed:
May. 06, 2009
Xiaohong Quan, San Diego, CA (US);
Lennart K. Mathe, San Diego, CA (US);
Liang Dai, San Diego, CA (US);
Dinesh J. Alladi, San Diego, CA (US);
Xiaohong Quan, San Diego, CA (US);
Lennart K. Mathe, San Diego, CA (US);
Liang Dai, San Diego, CA (US);
Dinesh J. Alladi, San Diego, CA (US);
Qualcomm Incorporated, San Diego, CA (US);
Abstract
All-digital techniques for generating periodic digital signals having selectable duty cycles. In one aspect, a computation block is provided for computing the product of a selected duty cycle and a discrete ratio between a reference clock period and a high-frequency oscillator period. The computation block may be coupled to a pulse width generator for generating signals having pulse widths that are integer multiples of the high-frequency oscillator period. In another aspect, a pulse width generator may also accommodate mixed fractional multiples of high-frequency oscillator periods by tapping the individual inverter stages of a delay line matched to the individual inverter stages of a ring oscillator exemplary embodiment of the high-frequency oscillator.