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Voltage Pulse Width Select Circuit

IP.com Disclosure Number: IPCOM000095737D
Original Publication Date: 1964-Jun-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 23K

Publishing Venue

IBM

Related People

Smith, AW: AUTHOR

Abstract

This circuit alters the widths of selected input pulses by changing the leading edge, the trailing edge or both edges of a pulse. The frequency range of operations is dependent only on the circuit speeds.

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Voltage Pulse Width Select Circuit

This circuit alters the widths of selected input pulses by changing the leading edge, the trailing edge or both edges of a pulse. The frequency range of operations is dependent only on the circuit speeds.

An input pulse is simultaneously applied to the pair of single shots S1 and S2. These have adjustable conduction durations after switching to their quasi- stable operating states. The output of S1 is Anded with the input pulse at A1 to provide an output corresponding to the original input pulse with its trailing edge shortened. The output of S2 is inverted and then Anded at A2 with the input pulse. Thus, A2 provides an output corresponding to the original input pulse with its leading edge delayed by an amount equal to the time delay of S2. These two outputs can be selectively employed by themselves. They can, in turn, be Anded at A3 to produce a pulse shortened at both the leading and trailing edges.

The amount and type of pulse shortening are selected by utilizing decade capacitors in the single shots and selection switches at the outputs of the circuit. Also, the pulses can be altered by lengthening them by inverting the outputs from the And's A1, A2 and A3.

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