(a) Draw the circuit diagram of a full wave rectifier using p-n junction diode. Explain its working and show the output, input waveforms.
(b) Show the output waveforms (Y) for the following inputs A and B of
(i) OR gate (ii) NAND gate 5mark
During first half cycle:
A is positive w.r.t centre tap but B is negative, hence only diode D1 conducts and current flows through the load in the sense X to Y. 1/2mark
During the second half cycle:
B is positive w.r.t centre tap but A is negative hence only diode D2 conducts and again send currents through load from X and Y. 1/2mark
Current through the load, in both the halves of input, is unidirectional.