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Pulsing Circuit

IP.com Disclosure Number: IPCOM000098289D
Original Publication Date: 1960-Jul-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Foglia, HR: AUTHOR

Abstract

The circuit produces constant amplitude output pulses whose timing corresponds to the occurrence of input signals having a predetermined voltage excursion from the immediately preceding signal level.

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Pulsing Circuit

The circuit produces constant amplitude output pulses whose timing corresponds to the occurrence of input signals having a predetermined voltage excursion from the immediately preceding signal level.

Each output pulse is provided at terminals 10 by a Schmitt trigger 11 whose triggering level is adjusted by an automatic level setting circuit 12 in accordance with the prior pulse applied to it via the input terminals 13. Positive going input signals led through capacitor 14 raise the potential of point 15 to fire the trigger
11. Point 15 follows the positive voltage excursions until the clamp potential as set by resistor 16 is achieved when further input excursions are stored as a charge on capacitor 14. Negative excursions from peak voltage turn trigger 11 off. Feedback from point 17 causes cathode follower 18 to rapidly discharge capacitor 14 to a level corresponding to the degraded input signal level.

A subsequent positive going input signal is always referenced to the charge on the capacitor 14 which was produced by the immediate preceding signal level.

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