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. 25, 2006
Filed:
Jun. 18, 2004
Weiye LU, Sunnyvale, CA (US);
Thomas Tse, Santa Clara, CA (US);
Wai Cheong Chan, Sunnyvale, CA (US);
Weiye Lu, Sunnyvale, CA (US);
Thomas Tse, Santa Clara, CA (US);
Wai Cheong Chan, Sunnyvale, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A quartz-crystal oscillator circuit substantially reduces the start-up time of the crystal oscillator circuit by utilizing a start-up time reduction circuit that adds additional gain to the crystal oscillator circuit during the start-up period, and removes the additional gain as the oscillator circuit nears steady state operation. Furthermore, the start-up time reduction circuit dynamically monitors the oscillation amplitude. If the build up of oscillation is interrupted, the additional gain will be re-applied.