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:
Sep. 02, 1997
Filed:
Jun. 07, 1995
Timothy G O'Shaughnessy, Black Forest, CO (US);
American Microsystems, Inc., Pocatello, ID (US);
Abstract
A multiple stage tracking filter includes a self-calibrating RC oscillator, a resistor connected to the self-calibrating RC oscillator and a capacitor connected to the self-calibrating RC oscillator. The filter further includes a switched capacitor filter element connected to the self-calibrating RC oscillator. The switched capacitor filter elements include a switch which is controlled by a timing signal from the self-calibrating RC oscillator. A method of filtering a signal includes the steps of operating a self-calibrating RC oscillator to generate a timing signal, tuning a plurality of cascaded filter elements with the generated timing signal and passing a signal through the plurality of tuned cascaded filter elements.