Question
  1. Draw the circuit diagram of a fullwave rectifier using p-n junction diode. Explain its working and show the output, input waveforms.
  2. Show the output waveforms (Y) for the following inputs A and B of
    1. OR gate.
    2. NAND gate.

Answer

  1.  

Duringfirsthalf 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.

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.

$\therefore$ Current through the load, in both the halves of input, is unidirectional.

  1.  

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