PULSE GENERATOR AND A CONTINUOUS TIME SIGMA-DELTA MODULATOR, CAPABLE OF PREVENTING THE DEGRADATION OF SIGNAL TO NOISE PERFORMANCE OF THE SIGMA-DELTA MODULATOR BY THE JITTER PERFORMANCE OF AN EXTERNAL CLOCK

摘要

PURPOSE: A pulse generator and a continuous time sigma-delta modulator are provided to easily design a circuit by using only a digital circuit including an unstable multi-vibrator, a counter, and a latch.;CONSTITUTION: An oscillator(810) generates a pulse through the oscillation according to an enable signal. A counter(820) outputs the accumulated pulse number by counting the pulse of the oscillator. An output unit outputs the inactivated output signal when the pulse number of the counter is equal to a PWM value. The oscillator comprises an unstable multi-vibrator. The output unit comprises a latch(840) which generates the inactivated output signal and a comparator(830) which outputs the activated output signal.;COPYRIGHT KIPO 2010