Data comparison circuit constructed with smaller number of trans

Details Data comparison circuit constructed with smaller number of trans Data comparison circuit constructed with smaller number of trans

1984-12-21

1987-09-15

Miller, Stanley D.

Communications: electrical

Digital comparator systems

G05B 100, G06F 704

Patent

active

046942742

ABSTRACT:
A circuit for comparing first and second binary coded digital data signals has a plurality of first circuits each including first and second transistors of a P-channel type connected in series between a first potential terminal and a first output node, a plurality of second circuits each including third and fourth transistors of an N-channel type connected in series between a second potential terminal and a second output node, and means for precharging the first and second output nodes to first and second logic levels, respectively. The first and third transistors are supplied with one bit data of the first signal, and the second and fourth transistors are supplied with an inverted data of the second signal. A change in the logic level at least one of the first and second output nodes is detected.

REFERENCES:
patent: 3517175 (1970-06-01), Williams
patent: 3604944 (1971-09-01), Gundersen
patent: 4109141 (1978-08-01), Sasaki

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