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:
Dec. 26, 2006
Filed:
Mar. 29, 2001
Uli Behringer, Wanchai, HK;
Jan Duwe, Krefeld, DE;
Uli Behringer, Wanchai, HK;
Jan Duwe, Krefeld, DE;
Red Chip Company Ltd., Tortola, VG;
Abstract
A circuit for processing an audio signal includes an input stage to which the audio signal is applied and an output at which the processed audio signal is presented. The circuit comprises first and second input stages () having nonlinear performance curves, the first stage receiving the audio signal at a specified phase, and the second stage receiving from an inverter () an inverse phase of the audio signal. A positive half wave of the input signal is processed nonlinearly and the negative half wave is processed linearly. A difference amplifier () receives the signals produced by the first and second input stages and generates an audio signal representing a difference between the signals present at its inputs.