Memory device for recording a time factor

Details Memory device for recording a time factor Memory device for recording a time factor

1993-11-12

1995-09-19

Heyman, John S.

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

Systems

Particular input circuit

377 20, 327398, 327279, H03K 2102, H03K 1730

Patent

active

054523362

ABSTRACT:
A memory device for recording a time factor of data includes a threshold element, coupling capacitance, an RC-circuit, and a digital counter. A reference voltage is input to the RC-circuit. The output of the RC-circuit and an input voltage are each input to the coupling capacitance. The output of the coupling capacitance is input to the threshold element. When the voltage received by the threshold element reaches a threshold voltage level, the threshold element generates an output voltage. The digital counter receives the threshold element output voltage and the reference voltage. The digital counter is triggered by the reference voltage to begin counting clock pulses generated by a reference clock. The digital counter is then triggered by the threshold element output voltage to stop counting the clock pulses.

REFERENCES:
patent: 4009443 (1977-02-01), Coulter et al.
patent: 4633491 (1986-12-01), Kuhnel
patent: 5128973 (1992-07-01), Sasaki et al.
Pulse, Digital & Switching, Waveforms by Millman & Taub p. 315 (FIG. 9-7) Copyright 1965.
Pricer, David, "Integrated Circuits", The Electrical Engineering Handbook, 1993, pp. 1651-1657.

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