Transition detector circuit
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United States of America Patent
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Nov 7, 1995
Issued Date -
N/A
app pub date -
Feb 3, 1994
filing date -
Apr 30, 1990
priority date (Note) -
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Abstract
A transition detection circuit is provided comprising input means receiving the signal to be monitored for generating a first pulse having a first predetermined pulsewidth when a transition occurs in the signal being monitored; and output means responsive to the first pulse from the input means for generating a second pulse having a second predetermined pulsewidth which is less than the first predetermined pulsewidth. The present invention permits a large number of signals to be monitored for transition yet provide a highly precise output pulsewidth, all with a minimum of circuitry. Preferably the input means include a plurality of input channels, each channel being assigned to a different signal being monitored and each channel providing the first predetermined pulsewidth using simple, non-precision time delay circuits. The output state employs a single, high precision time delay circuit to provide the second predetermined pulsewidth.
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