Pulse rejection and duration correction circuit

Details Pulse rejection and duration correction circuit Pulse rejection and duration correction circuit

H - Electricity

04

M

379/19, 328/83

H04M 3/22 (2006.01)

Patent

CA 1114970

PULSE REJECTION AND DURATION CORRECTION CIRCUIT Abstract of the Disclosure A circuit which is particularly adapted for reconstructing fixed time duration dialling pulses in a telephone communications system while rejecting spurious pulses of less than a selected pulse duration. The circuit utilizes two coupling networks having integrated outputs of opposite polarity which are summed after passing through two separate switching amplifiers. The summed outputs are fed through a third switching amplifier having a hysteresis characteristic so that it switches only when both outputs have switched to the same polarity. - i -

328335

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