Constant percent break type dial pulse corrector
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United States of America Patent
Stats
-
Jun 10, 1980
Grant Date -
N/A
app pub date -
Jul 26, 1978
filing date -
Jul 26, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The first monostable multivibrator of a series connected pair of monostable multivibrators is responsive to each break interval of input dial pulses for establishing a fixed time delay after which the second multivibrator initiates a corrected break interval and starts a first timing capacitor thereof charging at a rate set by a fixed time constant. Each input break interval also causes a capacitor of a second timing circuit to start discharging at a rate set by another fixed time constant, the time that the second capacitor starts discharging being a function of the pulse repetition frequency of input dial pulses. When the charge voltages on the two capacitors are the same values, the output of a comparator resets the second multivibrator to terminate an output break interval so as to cause corrected dial pulses in the output thereof to have a constant percent break.
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