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Noise Analyzer

IP.com Disclosure Number: IPCOM000095474D
Original Publication Date: 1964-Jan-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Rumble, DH: AUTHOR

Abstract

The circuitry distinguishes signal pulses of normal width from noise pulses which are narrower or wider.

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Noise Analyzer

The circuitry distinguishes signal pulses of normal width from noise pulses which are narrower or wider.

Spike P derived from the front edge of a pulse sets Flip-Flops (FF's) 1, 2 and 3 to 0 and enters a Delay Line. Spike Q derived from the trailing edge of the pulse resets FF 2 to 1. For a normal signal pulse spike P, issuing from the Delay Line at taps A and C, finds the And's 4 and 5 unconditioned by FF 2. For a narrow noise pulse it finds And 4 conditioned. For a wide noise pulse, it finds And 5 conditioned. For narrow wide noise pulses, spike P passes through And 4 and resets FF 3 to 1, thus deconditioning output And's 14, 15 and 16. For normal signal pulses the And's 14, 15 and 16 remain conditioned by FF3.

The integrated output from And 5 conditions via Schmitt trigger 17 either And 6 or 7. If there are no or few wide noise pulses, trigger 17 conditions And 6 and deconditions And's 7 and 19. If there are many wide noise pulses, trigger 17 conditions And's 7 and 19 and deconditions And 6.

In the presence of little wide noise, a spike P goes from tap D through And 6. In the presence of wide noise, a spike P goes from tap B through And 7. In either case, it proceeds via Or 8 to output And's 14, 15 and 16. If the spike P is derived from a normal signal, it passes through the output And conditioned by FF 3 and FF 9, 10 or 11. Further, it resets FF 1 and, via a delay, FF's 9, 10 and 11.

FF's 9, 10 and 11 are set by input signals. Circuitry 12 deli...