Center of gravity compensation of Class-D amplifier

Details Center of gravity compensation of Class-D amplifier Center of gravity compensation of Class-D amplifier

2005-02-15

2005-02-15

Nguyen, Patricia (Department: 2817)

Amplifiers

Modulator-demodulator-type amplifier

C330S20700P, C330S251000

Reexamination Certificate

active

06856194

ABSTRACT:
In a Class-D Amplifier with PCM (Pulse Code Modulated) input signal, the output pulse width may be adjusted to provide a constant time-voltage-area or the output pulse width may have one of several discrete values to provide a multi-level output system. A fundamental idea of this disclosure is to assure the center of each output pulse is always positioned at the nominal clock or with a fixed delay relative to the nominal clock. Said Class-D Amplifier typically converts the input signal into PDM (Pulse Density Modulated) pulses with a Sigma Delta Modulator and typically drives the output load with an H-Bridge.

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U.S. Appl. No. DS-02-012, “Linearization of a PDM Class-D Amplifier,” U.S. Appl. No. 10/336,967, filed Jan. 6, 2003, assigned to the same assignee.
U.S. Appl. No. DS-02-014, “Multi-level Class D Amplifier by Means of 3 Physical Levels,” U.S. Appl. No. 10/304,784, filed Nov. 26, 2002, assigned to the same assignee.

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