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Physical electronics devices and ics miscellaneous

Physical Electronics Devices and ICs

  1. A voltage signal 10 sin t is applied to the circuit with ideal diodes, as shown in figure. The maximum and minimum values of the output waveform Vout of the circuit are respectively—


    1. + 10 V and – 10 V
    2. + 4 V and – 4 V
    3. + 7 V and – 4 V
    4. + 4 V and – 7 V
Correct Option: D

The given circuit (i.e., fig-1)
For first half cycle the diode D2 will conduct while diode D1 will not conduct. Equivalent circuit for this case is shown below: (i.e., fig-2)
For the second half cycle diode D1 will conduct while diode D1 will not conduct. Equivalent circuit for this case is shown below: (i.e., fig-3)
From above figure
– 10 KI – 4 – 10 KI + 10 = 0

or I =
6
mA
20

V0 = – 4 – 10 ×
6
= – 4 – 3
20

= – 7V = V0 (min)
Hence alternative (D) is the correct choice.



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