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:
Aug. 15, 2000
Filed:
Mar. 31, 1999
Robert W Carver, Snohomish, WA (US);
Other;
Abstract
Disclosed is an audio amplifier with a tracking power supply that uses inductive power converters to provide positive and negative amplifier operating potentials of a magnitude that exceeds the DC voltage available to power the amplifier. The tracking power supply includes both a positive-going tracking-up converter and a negative-going tracking-up converter. Each of the tracking-up converters include an inductor, a capacitor, a diode, and a pulse-width modulator. The pulse-width modulator of the positive-going tracking-up converter produces signals representative of the positive amplitude of the audio signal being amplified and the pulse-width modulator of the negative-going tracking-up converter produces signals representative of the negative amplitude of the signal being amplified. The pulses-width modulated signals activate switches that cause current flow to increase through the inductors and subsequently cause the inductors to direct current to the capacitors in a manner that charge the capacitors to the proper tracking voltages.