Question

In the circuit below, $A$ and $B$ represent two inputs and $C$ represents the output.

The circuit represents a logic gate for which, values of $A, B$ and $C$ are as follows:

Determine the value of $x$. (Consider all the components in the circuit to be ideal.)

Answer 1

In the given circuit, the gate conducts when any of the diodes conduct. Thus, it represents an $OR$ gate. For $OR$ gate, the output is high when either or both the inputs are high.
$\therefore x=5 \,V$