Programmable time-interval generator

Details Programmable time-interval generator Programmable time-interval generator

1994-03-31

1995-06-06

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Applications

Including memory

377 20, 377 44, 377 49, 327279, H03K 2100, H03K 513

Patent

active

054229235

ABSTRACT:
A programmable time-intervals generator comprising first and second digital counters, a memory, a digital divider and a digital adder. On the occurrence of a first event, the first counter starts counting, and on the occurrence of a second event, only the most significant bits of the number counted up to then are stored, thereby providing a division by truncation. From the stored number, at least two discrete fractions are obtained by the divider, whereafter said fractions are summed at the adder which operates on strings of bits. The second counter counts down the sum number and, on becoming cleared, generates a signal.

REFERENCES:
patent: 3824378 (1974-07-01), Johnson et al.
patent: 4371940 (1983-02-01), Yamaki et al.
patent: 4809221 (1989-02-01), Magliocco et al.
patent: 5142651 (1992-08-01), Cronyn
Ogasawara et al., "An Approach to Position Sensorless Drive for Brushless dc Motors," IEEE Transactions on Industry Applications 27(5):928-933, 1991.

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