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Logic Experiment 6

Logic Experiment 6. 老師：伍紹勳 助教：江長庭 鄭仲傑. BCD Adder. Equipment ： IC ： 7402(NOR)x 1 、 7408(AND) x 1 、 7404(Inverter)x 1 、 7432(OR) x 1 、 LED x 3. Comparator circuit. 2bits Comparator circuit Design A=B, A>B, A<B. A=B. A=A 1 A 0 & B=B 1 B 0 First, consider low bit A 0 B 0

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Logic Experiment 6

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  1. Logic Experiment 6 老師：伍紹勳 助教：江長庭 鄭仲傑

  2. BCD Adder Equipment： IC：7402(NOR)x 1、7408(AND) x 1、7404(Inverter)x 1、7432(OR) x 1、LED x 3

  3. Comparator circuit 2bits Comparator circuit Design A=B, A>B, A<B

  4. A=B A=A1A0 & B=B1B0 First, consider low bit A0 B0 If A0 =B0, LED would be light(X0=1) Result of X0 would be A XNOR B !!

  5. A=B A=A1A0 & B=B1B0 Second, consider high bit A1B1 If A1=B1, LED would be light(X1=1) Result of X1 would be A XNOR B !!

  6. A=B A=A1A0 & B=B1B0 Finally, If A=B X1=1 & X0=1 Result of LED would be X=X1X0

  7. Demo A=B, A>B , A<B A>B = A<B= Choose the value of A and B, and then there is only one result of LED.

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