Memory device for recording a time factor
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United States of America Patent
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-
Sep 19, 1995
Grant Date -
N/A
app pub date -
Nov 12, 1993
filing date -
Nov 13, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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