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:
Aug. 30, 1994
Filed:
Feb. 03, 1993
Rodney T Masumoto, Tustin, CA (US);
Jenn-Gang Chern, Yorba Linda, CA (US);
Silicon Systems, Inc., Tustin, CA (US);
Abstract
A one-shot control mechanism for ensuring close tracking of one-shot period to VCO period. The one-shot control mechanism provides immunity to data jitter and other spurious phenomena as well as stable and accurate tracking of one-shot period even when the VCO frequency varies from the center frequency of the VCO. The present invention includes a data capture PLL circuit and a frequency reference PLL circuit. The frequency reference PLL circuit provides a control signal to one or more one-shots to control their output pulse duration. Since the frequency reference PLL circuit operates at the expected frequency of data input, a relatively constant relationship may be maintained between the output pulse duration of the one-shots and the period of the VCO output.