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Gated Delay Line Square Wave Generator

IP.com Disclosure Number: IPCOM000093336D
Original Publication Date: 1967-Aug-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Stidger, CW: AUTHOR

Abstract

Maximum amplitude on gating is afforded with this square-wave generator. Transistors 11, 12, and 13 form an And-Inverter gating circuit with a constant current energizing source including another transistor 16. This bootstrap circuit has three input terminals G1, G2 and G3. Two input gating pulses are applied to G1 and G2 for turning on the generator. If desired, only one gate input is necessary and three or more can be arranged as the need requires.

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Gated Delay Line Square Wave Generator

Maximum amplitude on gating is afforded with this square-wave generator. Transistors 11, 12, and 13 form an And-Inverter gating circuit with a constant current energizing source including another transistor 16. This bootstrap circuit has three input terminals G1, G2 and G3. Two input gating pulses are applied to G1 and G2 for turning on the generator. If desired, only one gate input is necessary and three or more can be arranged as the need requires.

The circuit is arranged so that, when pulses are applied to G1 and G2, the And-Inverter is effective to pass a pulse level down delay line 20 to emitter- follower transistor 24. This wave is then returned to terminal G3 to cut off the And-Inverter. This drives a negative pulse level down delay 20 which, on arriving at transistor 24, is effective to return the And-Inverter to the on condition so long as pulses at G1 and G2 are present.

The oscillations are sustained as long as gating waves are applied to terminals G1 and G2. The frequency of the output oscillations is determined by the delay time of delay 20. The frequency stability is a function of the quality of the line. The rise and fall time periods of the output wave are approximately those specified for delay 20. These time periods can be minimized by adjusting resistor 26 in the energizing lead.

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