engineering recuitment ISRO Scientist Electronics Mock Test Digital Electronics Logic Families Bipolar Logic Families
In the circuit shown below, the BJT has negligible collector to emitter saturation voltage and the diode drops negligible voltage across it under Forward bias. If VCC is +5V, X and Y are digital signals with 0 V as logic 0 and VCC as logic 1, then the Boolean expression for Z is
1
xy
2
\(\overline {xy}\)
3
\(\bar XY\)
4
\(X\bar Y\)