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Pulse Detector

IP.com Disclosure Number: IPCOM000091228D
Original Publication Date: 1969-Nov-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Garrett, MJ: AUTHOR

Abstract

The arrangement is used to detect low-energy pulses and is useful where it is necessary to transmit pulses originating from low-energy sources over long lines. Such a source is represented by a rotating magnet cooperating with coil L1. The emf developed across L1 is applied to the trigger electrode of a silicon controlled rectifier SCR via resistor R2. Thus, a positive pulse, developed across L1, fires the SCR, developing a voltage across R1 which fires a single-shot S-S. The latter is arranged, when fired, to cause T1 to conduct, thus diverting to itself the current previously flowing through SCR which therefore turns off. When S-S times out, T1 ceases to conduct and the potential at the anode of SCR rises to prepare it for the next pulse.

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Pulse Detector

The arrangement is used to detect low-energy pulses and is useful where it is necessary to transmit pulses originating from low-energy sources over long lines. Such a source is represented by a rotating magnet cooperating with coil L1. The emf developed across L1 is applied to the trigger electrode of a silicon controlled rectifier SCR via resistor R2. Thus, a positive pulse, developed across L1, fires the SCR, developing a voltage across R1 which fires a single-shot S-S. The latter is arranged, when fired, to cause T1 to conduct, thus diverting to itself the current previously flowing through SCR which therefore turns off. When S-S times out, T1 ceases to conduct and the potential at the anode of SCR rises to prepare it for the next pulse. Diode D1 provides a voltage translation to insure that SCR turns off when T1 saturates.

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