Electrical pulse counters – pulse dividers – or shift registers: c – Systems – Including structure for detecting or indicating overflow...
Patent
1983-12-30
1985-10-08
Heyman, John S.
Electrical pulse counters, pulse dividers, or shift registers: c
Systems
Including structure for detecting or indicating overflow...
377 20, 377 44, H03K 2134
Patent
active
045464871
ABSTRACT:
At the inception of a time interval whose duration is to be measured, pulses whose rate may be varied are applied to a first counter. A second counter controls the rate of the pulses applied to the first counter. An overflow sensing circuit is connected to the output of the first counter for, in response to each overflow signal at the output of the first counter, incrementing the second counter which then causes pulses having a new rate to be applied to the first counter and for, concurrently, presetting the counter to a new count. The new rate is equal to 1/N the old rate and the new count is equal to 1/N the count in the first control prior to the overflow. The elapsed time information in the circuit is therefore always valid.
REFERENCES:
patent: 3413449 (1968-11-01), Brown
patent: 4066875 (1978-01-01), Ollington et al.
patent: 4079315 (1978-03-01), Mohr
patent: 4203030 (1980-05-01), Moran
Haas George E.
Heyman John S.
RCA Corporation
Schanzer Henry I.
Tripoli Joseph S.
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