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Transistor Pulse Circuit

IP.com Disclosure Number: IPCOM000098789D
Original Publication Date: 1959-Dec-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Kuntzleman, HC: AUTHOR [+2]

Abstract

In response to an input pulse to a terminal 11, the circuit emits a single pulse at an output terminal 12.

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Transistor Pulse Circuit

In response to an input pulse to a terminal 11, the circuit emits a single pulse at an output terminal 12.

Transistor T1 is normally nonconductive and transistor T2 is normally conductive. An input pulse to terminal 11 has the dual effect of driving the core 10 to saturation and rendering T1 conductive. Driving the core 10 to saturation induces an output pulse on winding W3. With the core 10 driven to saturation, further application of a signal of the same polarity at terminal 11 is ineffective.

When T1 conducts, the capacitor C1 is positively charged and T2 is rendered nonconductive. When the pulse is removed from terminal 11, T1 returns to its nonconductive state. Thereafter, at a time determined by the RC constant of C1 and R1, T2 again becomes conductive and a current is passed through winding W2 which switches the core 10 to its original state and induces a reset pulse in winding W3.

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