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. 21, 2009
Filed:
Apr. 30, 2007
Kevin Yikai Liang, Cupertino, CA (US);
Arvind Bomdica, Fremont, CA (US);
Min Xu, Mountain View, CA (US);
Ming SO, Danville, CA (US);
Kevin YiKai Liang, Cupertino, CA (US);
Arvind Bomdica, Fremont, CA (US);
Min Xu, Mountain View, CA (US);
Ming So, Danville, CA (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
An ultra-low power crystal oscillator architecture that draws less than 2 μA during steady state operation. An amplifier stage is self biased and has input and output clamp circuits that limit its signal swing. Circuit values are selected such that there is sufficient transient load current for the first amplifier stage to oscillate, while at the same time the input and output clamp circuits maintain a sufficiently low swing of the stage such that the steady state average load current is on the order of less than 1 μA.