Reduction of audible artifacts in an audio system

Details Reduction of audible artifacts in an audio system Reduction of audible artifacts in an audio system

2007-10-09

2007-10-09

Nguyen, Khanh Van (Department: 2817)

Amplifiers

Modulator-demodulator-type amplifier

C330S251000

Reexamination Certificate

active

11150952

ABSTRACT:
An audio system includes a switch mode amplifier that provides an output signal at an output for driving a load based on at least one control signal. A control system provides the at least one control signal to control the amplifier according to an operating mode of the audio system. In a first mode, the control system providing the at least one control signal to actively control an equivalent output impedance at the output of the amplifier, gradually adjusting the equivalent output impedance from a high-impedance state to a low impedance state, so as to mitigate a voltage drop across the load (e.g., including one or more speakers) when the amplifier is activated to a second mode corresponding to the low impedance state.

REFERENCES:
patent: 6788137 (2004-09-01), Morita
patent: 6812785 (2004-11-01), Masuda et al.
Apogee Technology, Inc., “Applying the DDX-8000 in Binary Mode”, (date unknown), pp. 1-16.
“STA500, 30V 3.5A Quad Power Half Bridge”, Jul. 2003, ST Micro electronics, pp. 1-10.
“CS4360 24-Bit, 192 kHz 6-channel D/A Converter”, http://www.cirrus.com, Jul. 2004, Cirrus Logic, Inc. pp. 1-37.

Affiliated with

Also associated with

Rating

Reduction of audible artifacts in an audio system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Reduction of audible artifacts in an audio system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reduction of audible artifacts in an audio system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3831833