Semiconductor E...

Logic gate realised from pn junctions shown in figure is

The Boolean expression for NOR gate is:

Any digital circuit can be realised by repetitive use of only

If a,b,c,d are input to a gate and x is its ouput, then as per the following time graph, the gate is 

In the combination of the given gates the output $$Y$$ can be written in terms of inputs $$A$$ and $$B$$ as:

The following transistor circuit is equivalent to which logic gate ?

Three NAND gates are used as shown in diagram and give a new logic gate. Then Boolean algebra for the new gate is

In a forward biased $$P-N$$ junction carrying a certain amount of current, which of the following statement is false?

A p-n junction diode connected in series with a resistor of 200 $$\Omega $$ is forward biased so that a current 200 mA flows.If the voltage across this combination is instantaneously reversed at t=0, the current through diode is approximately,

Which of the following circuits correctly represent the following truth table?