Asynchronous counter

Details Asynchronous counter Asynchronous counter

1989-06-13

1991-05-28

Heyman, John S.

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

Systems

Counter controlled counter

377 47, 377 52, 377108, 377110, H03K 2100, H03K 2300

Patent

active

050200828

ABSTRACT:
An asynchronous nonlogical counting device includes at least a first counter and a second counter connected in cascade. The first counter has a frequency dividing ratio of 2.sup.n where n is a natural number. A control unit produces a control signal based on the count value of the first counter. The second counter has a variable frequency dividing ratio which is based on the control signal. The counting device can be made programmable by substituting a comparator circuit for the control unit. The comparator compares the output of the first counter to an instruction signal from an external source.

REFERENCES:
patent: 4084082 (1978-04-01), Alfke
patent: 4184068 (1980-01-01), Washburn
patent: 4423381 (1983-12-01), Stepp et al.
patent: 4573176 (1986-02-01), Yeager
patent: 4633194 (1986-12-01), Kikuchi et al.
patent: 4712224 (1987-12-01), Nelson
patent: 4856032 (1989-08-01), Klekotka et al.
"Ordinal Circuit Theory" by Yoshihiro Toma, Title Page and pp. 90-93 and 278 (1976).

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