* in a simple copy machine, a stpo signal, S, is to be generated to stop the machie operation and turn on an indicator light whenever either of the following conditions exists:
1.there is no paper in the paper try
2.two switches in the paper path are activated,indicating a paper jam
* the presence of paper in the tray is indicated by a HIGH at logic signal P
* each switch produces a logic signal(Q and R) that go HIGH whenever paper is passing over the switch to activate it.
* design the logic circuit to produce a HIGH at output signal S for the stated conditions: simplify the expression and implement the circuit in gates.
2007-03-28
09:33:54
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2 answers
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asked by
The Genius
1