GATE EE
Analog Electronics
Diode Circuits and Applications
Previous Years Questions

Marks 1

For the circuit shown below with ideal diodes, the output will be ...
For the circuit shown in the figure below, assume that diodes $${D_1},\,{D_2}$$ and $${D_3}$$ are ideal. The $$DC$$ components of voltages $${v_1}$$...
In the following circuit, the input voltage $${V_{in}}$$ is $$100\sin \left( {100\pi t} \right).$$ For $$100\pi RC = 50,$$ the average voltage across ...
The sinusoidal ac source in the figure has an rms value of $${{20} \over {\sqrt 2 }}\,V.$$ Considering all possible values of $${R_L},\,\,$$ the minim...
The figure shows the circuit of a rectifier fed from a 230 V (rms), 50Hz sinusoidal voltage source. If we want to replace the current source with a re...
The $$i$$-v characteristics of the diode in the circuit given below are $$$i = \left\{ {\matrix{ {{{v - 0.7} \over {500}}A,} & {v \ge 0.7\,V} ...
Assuming that the diodes an ideal in the given circuit, the voltage $${V_0}$$ is ...
The following circuit has a voltage source $${V_s}$$ as shown in the graph. The current through the circuit is also shown The element connected...
The equivalent circuits of a diode, during forward and reverse biased conditions are shown in figure. (a) (b) If such diodes are used in the clipp...
What are the states of the three ideal diodes of the circuit shown in figure? ...
Assume that $${D_1}$$ and $${D_2}$$ in figure are ideal diodes the value of current $${I_s}$$ is ...
The current through the zener diode in the given circuit is ...
The cut in voltage of both Zener diode $${D_z}$$ and diode $$D$$ shown in Figure is $$0.7$$ $$V,$$ while break down voltage of the zener is $$3.3$$ $$...
The forward resistance of the diode shown in figure is $$5\Omega $$ and the remaining parameters are same as those of ideal diode. The $$DC$$ componen...
As temperature is increased, the voltage across a diode carrying a constant current.
The colour code of a $$1k\Omega $$ resistance is
The mobility of an electron in a conductor expressed in terms of
In the following circuit the $$5$$ $$V$$ zener diode requires a minimum current of $$10$$ $$mA.$$ For obtaining a regulated output of $$5V,$$ the maxi...

Marks 2

Assuming the diodes to be ideal in the figure, for the output to be clipped, the input voltage $${V_i}$$ must be outside the range ...
In the circuit shown below, the knee current of the ideal Zener diode is $$10$$ $$mA.$$ To maintain $$5 V$$ across $${R_L}$$, the minimum value of $${...
A voltage $$1000\sin \omega t$$ Volts is applied across $$YZ.$$ Assuming ideal diodes, the voltage measured across $$WX$$ in Volts is ...
A clipper Circuit is shown below Assuming forward voltage drops of the diodes to be $$0.7V,$$ the input-output transfer characteristics of the circ...
In the voltage doubler circuit shown in figure, the switch $$' S '$$ is closed at $$t=0$$. Assuming diodes $${D_1}$$ & $${D_2}$$ to be ideal, load...
Assuming the diodes $${D_1}$$ and $${D_2}$$ of the circuit shown in the figure to be ideal ones, the transfer characteristics of the circuit will be ...
Assuming that the diodes are ideal in figure the current in the diode $${D_1}$$ is ...
A voltage signal $$\,10\,\,\sin \,\omega t\,\,$$ is applied to the circuit with ideal diodes, as shown in figure. The maximum and minimum values of th...
A diode whose terminal characteristics are related as $${i_D} = {{\rm I}_S}\,{e^{{V \over {{V_T}}}}},\,$$ where $${{\rm I}_S}$$ is the reverse saturat...
In the single phase diode bridge rectifier shown in the figure, the load resistor is $$R = 50\,\Omega .$$ The source voltage is $$V=200$$ $$sin$$ $$\o...
Figure shows as electronic voltage regulator the zener diode may be assumed to require a minimum current of $$25$$ $$mA$$ for satisfactory operations....

Marks 5

In the circuit shown in figure calculate and sketch the wave form of current $$'i'$$ over one period of the i/p voltages. Assume the diodes to be idea...
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