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:
Jan. 03, 2006
Filed:
Sep. 17, 2002
Ralph Mason, Ottawa, CA;
Chris Devries, Ottawa, CA;
Ralph Mason, Ottawa, CA;
Chris DeVries, Ottawa, CA;
Eno Semiconductor Inc., Ottawa, CA;
Abstract
A Method for filter tuning using direct digital sub-sampling is provided. The tuning is accomplished in the digital domain by determining the filter characteristics from the shape of the transfer function. The input signal () is passed through the filter () and is then sub-sampled by and Analog-to-digital Converter (ADC) (). The sub-sampled signal () is then processed in the digital domain using a digital circuit () that is used to determine the center frequency (Fc) and Quality factor (Q) and/or other important filter parameters. The Fc, Q and/or other important filter parameters are then adjusted by generating digital control signals () that can be converted to analog signals () using Digital-to-analog Converters (DACs) ().