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This question belongs to Electronics And Communications Engineering Digital Electronics

Digital Electronics

?

In the circuit shown below Q₁ 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

A) $${\text{XY}}$$ B) $$\overline {\text{X}} {\text{Y}}$$ C) $${\text{X}}\overline {\text{Y}} $$ D) $$\overline {{\text{XY}}} $$

Answer & Solution

Correct Answer: Option B

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