Electrical pulse counters – pulse dividers – or shift registers: c – Particular transfer means – Including logic circuit
Patent
1988-10-27
1990-05-08
Heyman, John S.
Electrical pulse counters, pulse dividers, or shift registers: c
Particular transfer means
Including logic circuit
377106, 377111, H03K 2102, H03K 2340
Patent
active
049244841
ABSTRACT:
A high speed counter circuit for counting electrical pulses includes a master/slave flip-flop at the input stage of the counter. An AND gate logically ANDs the pulses being counted with the master output to produce a first gating signal. A plurality of cascade coupled flip-flops each having a slave and an inverse slave output are provided. The clock input to each cascade coupled flip-flop is produced by the logical OR of the electrical pulses being counted, the first gating signal and the slave output of all preceding flip-flops of the counter. The counter output is provided by the inverse slave output of each flip-flop.
REFERENCES:
patent: 3064890 (1962-11-01), Butler
patent: 3517318 (1970-06-01), McDermond
patent: 3548319 (1970-12-01), Price
patent: 3949311 (1976-04-01), Lohmann
patent: 4679216 (1987-07-01), Iida et al.
Grasso Lawrence J.
Hoffman Dale E.
Morgan Carroll E.
Puntar Charles A.
Young Diane K.
Crane John D.
Heyman John S.
International Business Machines Corp.
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