Pulse width modulator control circuit

Details Pulse width modulator control circuit Pulse width modulator control circuit

1990-03-23

1991-09-03

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307261, 307265, 307268, 307360, 328 62, H03K 501, H03K 5153

Patent

active

050458000

ABSTRACT:
A circuit generates control signals used in pulse width modulation. A square wave signal generator generates a square wave signal based on the value of a sawtooth signal. The sawtooth signal has a maximum voltage level and a minimum voltage level. The voltage level of the sawtooth signal is compared with a first voltage slightly above the minimum voltage level. When voltage of the sawtooth signal is increasing and reaches the first voltage, a rising edge of the square wave is generated. The voltage level of the sawtooth signal is also compared with a second voltage slightly below the maximum voltage level. When voltage of the sawtooth signal is increasing and reaches the second voltage, a falling edge of the square wave signal is generated.

REFERENCES:
patent: 3571501 (1971-03-01), Yamamoto
patent: 4587439 (1986-05-01), Van Roessel

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