Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Computer Science Posted 17 Jul 2017 My Price 7.00

mechanical switch

It is almost impossible to obtain a “clean” voltage transition from a mechanical switch because of the phenomenon of contact bounce. This is illustrated in Figure 5-9(a), where the action of moving the switch from contact position 1 to 2 produces several output voltage transitions as the switch bounces (makes and breaks contact with contact 2 several times) before coming to rest on contact 2.

The multiple transitions on the output signal generally last no longer than a few milliseconds, but they would be unacceptable in many applications. A NAND latch can be used to prevent the presence of contact bounce from affecting the output. Describe the operation of the “switch debouncing” circuit in Figure 5-9(b).

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Maurice Tutor
(5)
Status NEW Posted 17 Jul 2017 10:07 PM My Price 7.00

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