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:
May. 09, 2006
Filed:
Jun. 15, 1999
Philip R. Jeffs, Snohomish, WA (US);
Dennis A. Bohn, Mukilteo, WA (US);
Philip R. Jeffs, Snohomish, WA (US);
Dennis A. Bohn, Mukilteo, WA (US);
Rane Corporation, Mukilteo, WA (US);
Abstract
An audio tone-control circuit includes 4-order low-pass, 4-order band-pass, and 4-order high-pass filter circuits. The 4-order low-pass filter circuit has a first phase response and receives and filters an audio signal and generates a first output signal therefrom. The 4-order band-pass filter circuit has a second phase response that is substantially equal to the first phase response and receives and filters the audio signal to generate a second output signal. The 4-order high-pass filter circuit has a third phase response substantially equal to the first and second phase responses and receives and filters the audio signal to generate a third output signal. The audio-signal circuit also includes a combining circuit that combines the first, second and third output signals into a combined signal. Furthermore, the filter circuits may be 2-order filter circuits instead of 4-order filter circuits.