Title:
DIGITAL CLASS-D AUDIO AMPLIFIER
Document Type and Number:
WIPO Patent Application WO2002015393
Kind Code:
A3
Abstract:
A Class-D audio amplifier is disclosed which accepts a digitized audio signal input and drives a load such as a loudspeaker without digital-to-analog conversion. The amplifier preferably comprises (1) means for receiving a digitized audio signal in the form of a plurality of digital values, (2) means for pulse-width modulating a pulse waveform in accordance with the digital values, and (3) a demodulator operative on the modulated waveform to produce an analog representation of the digitized audio signal.
Inventors:
ULRICK JOHN W (US)
Application Number:
PCT/US2001/024502
Publication Date:
May 10, 2002
Filing Date:
August 03, 2001
Export Citation:
Assignee:
ULRICK JOHN W (US)
International Classes:
H02M7/538; H03F1/30; H03F1/52; H03F3/217; (IPC1-7): H03F3/217; H03F1/30; H03F1/52; H03M1/82
Foreign References:
| DE19619208A1 | 1997-11-13 | |||
| US5617058A | 1997-04-01 | |||
| US5406284A | 1995-04-11 | |||
| US5559467A | 1996-09-24 | |||
| US5973368A | 1999-10-26 | |||
| US5510753A | 1996-04-23 |
Other References:
BOWHERS W J ET AL: "Design of an integrated ATE amplifier", AUTOTESTCON '94. IEEE SYSTEMS READINESS TECHNOLOGY CONFERENCE. 'COST EFFECTIVE SUPPORT INTO THE NEXT CENTURY', CONFERENCE PROCEEDINGS. ANAHEIM, CA, USA 20-22 SEPT. 1994, NEW YORK, NY, USA,IEEE, 20 September 1994 (1994-09-20), pages 745 - 748, XP010131224, ISBN: 0-7803-1910-9
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