Question

In the circuit shown below, $Q_1$ has negligible collector-to-emitter saturation voltage and the diode drops negligible voltage across it under forward bias. If $V_{cc}$ is +5 V, X and Y are digital signals with 0 V as logic 0 and $V_{cc}$ as logic 1, the Boolean expression for Z is

Answer 1

X	Y	Z
0	0	0
0	1	1
1	0	0
1	1	0

X	Y	Q	Z
0	0	OFF	0
0	+5V	OFF	+5V
+5V	0	ON	0
+5V	+5V	ON	0