Digital pulse generator having a programmable pulse width and a

Details Digital pulse generator having a programmable pulse width and a Digital pulse generator having a programmable pulse width and a

1988-08-04

1989-09-26

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328 58, 307265, 307271, 377 39, 377 56, H03K 504, H03K 5135

Patent

active

048706655

ABSTRACT:
A technique for accurately controlling both the pulse repetition interval and pulse width of a pulse signal generator which uses a crystal oscillator to maintain a very accurate time base. Two separate digital counters clock-in the clock pulses. When the desired number of clock pulses are registered by the first counter, a first digital comparator generates a start pulse which resets the first counter and triggers an output flip-flop. The change of state in the flip-flop enables the second counter to begin its count. When the desired number of clock pulses are registered by the second counter, a second digital comparator generates an end pulse which resets the second counter and triggers the flip-flop a second time. The second change of state of the flip-flop disables the second counter until the first comparator generates a new start pulse. The new start pulse toggles the flip-flop and the entire process is repeated continuously to generate at the output of the flip-flop a periodic pulse train having the desired pulse width with the leading edges separated by the desired pulse repetition interval.

REFERENCES:
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patent: 4049953 (1977-09-01), Evans
patent: 4079234 (1978-03-01), Kashio
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patent: 4330751 (1982-05-01), Swain
patent: 4339657 (1982-07-01), Larson et al.
patent: 4415861 (1983-11-01), Palmquist et al.
patent: 4608706 (1986-08-01), Chang et al.
patent: 4623846 (1986-11-01), Lamacchia
patent: 4754163 (1988-06-01), Aue et al.

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