MSI Logic Circuits

Q1:
It is suspected that the comparator in the figure given below has a problem. The inputs are activated in the table shown below and the corresponding outputs noted. What is most likely wrong with the circuit?
For P0 – P3 = 1 and Q0 – Q3 = 0, P > Q = 1, P = Q = 1, P < Q = 0
For P0 – P3 = 0 and Q0 – Q3 = 1, P > Q = 0, P = Q = 1, P < Q = 1
For P0 – P3 = 1 and Q0 – Q3 = 1, P > Q = 0, P = Q = 1, P < Q = 0

A The P0–P3 inputs are defective.

B One or more of the Q inputs is bad.

C The P = Q output is shorted to V_cc.

D Nothing is wrong; the circuit is functioning properly.

ANS:C - The P = Q output is shorted to V_cc.

No answer description is available.

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