Digital PWM control circuit

Details Digital PWM control circuit Digital PWM control circuit

1987-03-06

1988-02-23

Wong, Peter S.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

318811, 363131, 363135, H02M 112

Patent

active

047274689

ABSTRACT:
The PWM-controlled circuit includes an up/down counter and utilizes the fact that, when a numerical value is a complementary binary value, the sign is indicated by its most significant bit (sign bit). In the PWM control circuit, the up/down counter is controlled so that when its preset input receives a reference signal, a PWM signal of a duty factor proportional to the reference signal is directly obtained from the most significant bit of the output count.

REFERENCES:
patent: 4099109 (1978-07-01), Abbondanti
patent: 4166247 (1979-08-01), Miyazawa
patent: 4337429 (1982-06-01), Stuart
patent: 4348734 (1982-09-01), Dougherty
patent: 4613933 (1986-09-01), Shaw
patent: 4636928 (1987-01-01), Deguchi et al.

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