Constant percent break type dial pulse corrector

Details Constant percent break type dial pulse corrector Constant percent break type dial pulse corrector

H - Electricity

04

M

328/102, 379/19

H04M 1/30 (2006.01) H04Q 1/36 (2006.01)

Patent

CA 1118125

D-21,521 CONSTANT PERCENT BREAK TYPE DIAL PULSE CORRECTOR by Nam Tosuntikool and Robert Yapp ABSTRACT OF THE DISCLOSURE The first astable multivibrator of a series connected pair of astable 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 repe- tition 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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