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Pulse Timer

IP.com Disclosure Number: IPCOM000093843D
Original Publication Date: 1966-Mar-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Cisewski, KR: AUTHOR [+2]

Abstract

The time interval between selected pulses in pulse trains applied at A and B, or between selected pulses within one of the trains, is determined and displayed at the output of clock 10. Start switches 12 and 14 govern the outputs on line 20. For example, with 12 set to A and 14 set to -, a pulse appears on line 20 each time a negative-going signal is presented at A. Stop switches 16 and 18 determine the outputs on line 22 so that, with 16 set to B and 18 set to n, a pulse is issued on 22 each time a negative-going transition is presented at B.

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Pulse Timer

The time interval between selected pulses in pulse trains applied at A and B, or between selected pulses within one of the trains, is determined and displayed at the output of clock 10. Start switches 12 and 14 govern the outputs on line 20. For example, with 12 set to A and 14 set to -, a pulse appears on line 20 each time a negative-going signal is presented at A. Stop switches 16 and 18 determine the outputs on line 22 so that, with 16 set to B and 18 set to n, a pulse is issued on 22 each time a negative-going transition is presented at B.

Signals on 20 are fed to advance counter 34 while signals on 22 are transmitted to an input of And 28. The digital output of 34 is applied to a first input of start compare circuit 30 and to a first input of stop compare circuit 32. The second inputs to 30 and 32 are supplied by the outputs from start pulse selection switch 24 and stop pulse selection switch 26 respectively. An output from 30 starts a timing interval by activating 10 while an output from 32 coinciding with a signal on 22 stops 10.

The circuit operates to measure the time interval between, for example, the start of the third and twenty-seventh pulses presented at A as follows. Switches 12 and 16 are set to A and 14 and 18 are set to +. Switches 24 and 26 are set to 3 and 27 respectively. Thus, an output from 30 activates 10 at the start of the third input pulse at A. An output from 28 turns 10 off at the start of the twenty- seventh pulse at A. T...