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. 02, 2011
Filed:
May. 11, 2009
Stephen E. Aycock, Fremont, CA (US);
Stephen E. Aycock, Fremont, CA (US);
Integrated Device Technology, Inc., San Jose, CA (US);
Abstract
A load circuit for a crystal oscillator includes a plurality of capacitors and a load control circuit configured to selectively add the capacitors to a load at a terminal of the crystal oscillator responsive to a command signal to provide a non-linear capacitive load at the terminal of the crystal oscillator that compensates for a non-linearity of a frequency versus load capacitance characteristic of the crystal oscillator. The load circuit may include a plurality of switches, respective ones of which are configured to load a terminal of the crystal oscillator with respective ones of the capacitors, and control circuit configured to control the plurality of switches to load the terminal of the crystal oscillator responsive to a binary command signal such that respective single ones of the switches operates in response to respective quantum changes a binary command signal over an operating range of the binary command signal.