Pulse width modulation in digital power amplifier

Details Pulse width modulation in digital power amplifier Pulse width modulation in digital power amplifier

2007-01-26

2008-11-18

Mai, Lam T (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S150000, C330S010000

Reexamination Certificate

active

07453387

ABSTRACT:
For PWM (pulse width modulation), a counter generates a count signal by counting a clock signal 2ntimes for one period of the count signal. A PWM circuit generates a PWM signal from an n-bit pulse code modulation (PCM) data. The PWM signal includes a first pulse and a second pulse that are symmetric within one period of the count signal for positive and negative values of the n-bit PCM data. A same pulse width for the first and second pulses is determined by a respective value of each bit of the n-bit PCM data excluding the most and least significant bits of the n-bit PCM data.

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