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:
Nov. 16, 1999
Filed:
Nov. 08, 1996
Jeffrey C Lawton, Camarillo, CA (US);
Other;
Abstract
A digital multi-bandpass audio equalizer which is comprised of an analog multiplexer (10), a two-channel analog-to-digital converter (12), a digital-to-analog converter (22), and a digital signal processor which is programmed to provide an arrangement consisting of combined anti-alias filters/sample rate decimators (14), memory buffers at various sample rates (16), bandpass filters (18), and 'virtual' potentiometers (20), structured in such a way that the digital filter elements which are operated at low frequencies are implemented at correspondingly low sample rates in order to minimize the amount of calculation involved, maximize computational efficiency and avoid the phenomenon of 'rate inversion'.