Increased resolution counting circuit
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United States of America Patent
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May 26, 1987
Grant Date -
N/A
app pub date -
May 16, 1986
filing date -
May 16, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A counting circuit includes a digital counter for counting the pulses of an input signal during a counting interval and a pair of digital latches for latching the binary state of the input signal at the beginning and end of the counting interval, respectively. The latched binary states of the input signal and the pulse count of the digital counter are evaluated by an interpreter such as logic circuitry or a microprocessor. The interpreter resolves the pulse count into half clock cycles by comparing the binary states and in response adjusts the pulse count by the addition or subtraction of half a clock cycle.
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