Dynamic pulse width modulation amplifiers

Details Dynamic pulse width modulation amplifiers Dynamic pulse width modulation amplifiers

2006-01-13

2008-08-12

Nguyen, Khanh V (Department: 2817)

Amplifiers

Modulator-demodulator-type amplifier

C330S20700P

Reexamination Certificate

active

07411447

ABSTRACT:
A dynamic pulse width modulation (PWM) amplifier comprising an input terminal, a dynamic PWM controller, a power stage, a low pass filter, and an output terminal. The input terminal receives an input signal. The dynamic PWM controller transforms the N-bit input signal sampled by a sampling frequency to a 1-bit PWM signal. The power stage receives and outputs the 1-bit PWM signal. The low pass filter receives and outputs the 1-bit PWM signal. The 1-bit PWM signal is used to drive the power stage and the low pass filter. The output terminal outputs the 1-bit PWM signal. The dynamic PWM amplifier is characterized in the dynamic PWM amplifier uses a register array to store the input signal processed immediately in each frame, regroups the input signal, and outputs the regroup signal, so that the 1-bit PWM signal is changed according to the input signal.

REFERENCES:
patent: 7102426 (2006-09-01), Kitamura
patent: 7206343 (2007-04-01), Pearce

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