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GATE EC Diode Circuits questions

Practise Diode Circuits questions for GATE EC. Explore official PYQs and original topic-wise quizzes, check answers and view available solutions. Free, no sign-in.

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Official PYQ2026Analog CircuitsDiode CircuitsNAT · 2 marks
Consider the ideal diodes D1\text{D1} and D2\text{D2} as shown in the Figure with cut-in voltage Vγ=0V_{\gamma}=0 Volt and vi(t)v_{i}(t) is in Volt. The maximum voltage (Volt) of the output vo(t)v_{o}(t) is ____\_\_\_\_ . (rounded off to two decimal places)
Official PYQ2025Analog CircuitsDiode CircuitsMSQ · 2 marks
All the diodes in the circuit given below are ideal. Which of the following plots is/are correct when VIV_{I} (in Volts) is swept from −M-M to MM?
Official PYQ2025Analog CircuitsDiode CircuitsNAT · 2 marks
The diode in the circuit shown below is ideal. The input voltage (in Volts) is given by VI=10sin⁡100πtV_{I}=10 \sin 100 \pi t, where time tt is in seconds. The time duration (in ms\mathrm{ms}, rounded off to two decimal places) for which the diode is forward biased during one period of the input is ____\_\_\_\_
Official PYQ2025Analog CircuitsDiode CircuitsNAT · 2 marks
An ideal p-n junction germanium diode has a reverse saturation current of 10μ A10 \mu \mathrm{~A} at 300 K300 \: \mathrm{ K}. The voltage (in Volts, rounded off to two decimal places) to be applied across the junction to get a forward bias current of 100 mA100 \: \mathrm{mA} at 300 K300 \: \mathrm{K} is _______\_\_\_\_\_\_\_. (Consider the Boltzmann constant …
Official PYQ2024Analog CircuitsDiode CircuitsMCQ · 1 mark
​In the circuit shown, the n:1n: 1 step-down transformer and the diodes are ideal. The diodes have no voltage drop in forward biased condition. If the input voltage (in Volts) is Vs(t)=10sin⁡ωtV_{s}(t)=10 \sin \omega t and the average value of load voltage VL(t)V_{L}(t) (in Volts) is 2.5/π2.5 / \pi, the value of nn is _______\_\_\_\_\_\_\_.
Official PYQ2023Analog CircuitsDiode CircuitsMCQ · 2 marks
In the circuit shown below, D1D_1 and D2D_2 are silicon diodes with cut-in voltage of 0.7 V0.7 \mathrm{~V}. VIN\mathrm{V}_{\mathrm{IN}} and VOUT\mathrm{V}_{\mathrm{OUT}} are input and output voltages in volts. The transfer characteristic is
Official PYQ2022Analog CircuitsDiode CircuitsNAT · 2 marks
A circuit and the characteristics of the diode (D)\text{(D)} in it are shown. The ratio of the minimum to the maximum small signal voltage gain ∂Vout∂Vin\frac{\partial V_{\text{out}}}{\partial V_{\text{in}}} is ____________ (rounded off to two decimal places).
Official PYQ2021Analog CircuitsDiode CircuitsNAT · 2 marks
An asymmetrical periodic pulse train vinv_{in} of 10 V10\:V amplitude with on-time TON=1 msT_{\text{ON}}=1\:ms and off-time TOFF=1 μsT_{\text{OFF}}=1\:\mu s is applied to the circuit shown in the figure. The diode D1D_{1} is ideal. The difference between the maximum voltage and minimum voltage of the output waveform vov_{o} (in integer) is ______________ VV.
Official PYQ2018Analog CircuitsDiode CircuitsMCQ · 2 marks
A 2×22\times 2 ROM array is built with the help of diodes as shown in the circuit below. Here W0W0 and W1W1 are signals that select the word lines and B0B0 and B1B1 are signals that are output of the sense amps based on the stored data corresponding to the bit lines during the read operation. …
Official PYQ2018Analog CircuitsDiode CircuitsNAT · 2 marks
A dcdc current of 26 μA26\:\mu A flows through the circuit shown. The diode in the circuit is forward biased and it has an ideality factor of one. At the quiescent point, the diode has a junction capacitance of 0.5 nF0.5\:nF. Its neutral region resistances can be neglected. Assume that the room temperature thermal equivalent voltage is 26 mV26\:mV. For …
Official PYQ2017Analog CircuitsDiode CircuitsNAT · 1 mark
The output V0V_0 of the diode circuit shown in the figure is connected to an averaging DC voltmeter. The reading on the DC voltmeter in Volts, neglecting the voltage drop across the diode, is _________________.
Official PYQ2017Analog CircuitsDiode CircuitsNAT · 2 marks
For a particular intensity of incident light on a silicon pnpn junction solar cell, the photocurrent density (JL)(J_L) is 2.5mA/cm22.5 mA/cm^2 and the open-circuit voltage (VocV_{oc}) is 0.4510.451 V. Consider thermal voltage (VTV_T) to be 2525 mV. If the intensity of the incident light is increased by 2020 times, assuming that the temperature remains …
Official PYQ2016Analog CircuitsDiode CircuitsNAT · 2 marks
An AC voltage source V=10sin⁡(t)V = 10 \sin(t) volts is applied to the following network. Assume that R1=3kΩR_1 = 3 k\Omega, R2=6kΩR_2 = 6 k\Omega and R3=9kΩR_3 = 9k\Omega, and that the diode is ideal. RMS current IrmsI_{rms}(in mA) through the diode is _______
Official PYQ2015Analog CircuitsDiode CircuitsMCQ · 1 mark
For the circuit with ideal diodes shown in the figure, the shape of the output voutv_{\text{out}} for the given sine wave input vinv_{\text{in}} will be
Official PYQ2015Analog CircuitsDiode CircuitsMCQ · 1 mark
If the circuit shown has to function as a clamping circuit, then which one of the following conditions should be satisfied for the sinusoidal signal of period T?T?
Official PYQ2015Analog CircuitsDiode CircuitsNAT · 2 marks
The diode in the circuit given below has VON=0.7 VV_{ON} = 0.7\:V but is ideal otherwise. The current (in mA)(\text{in}\: mA) in the 4 kΩ4\: k\Omega resistor is _______.
Official PYQ2015Analog CircuitsDiode CircuitsNAT · 1 mark
In the circuit shown, assume that diodes D1D_{1} and D2D_{2} are ideal. In the steady state condition, the average voltage VabV_{ab} (in Volts) across the 0.5 μF0.5\: \mu F capacitor is ______.
Official PYQ2015Analog CircuitsDiode CircuitsNAT · 2 marks
In the circuit shown, assume that the diodes D1D1 and D2D2 are ideal. The average value of voltage Vab (in Volts),V_{ab}\: (\text{in Volts}), across terminals ‘a’‘a’ and ‘b’‘b’ is _________.
Official PYQ2014Analog CircuitsDiode CircuitsNAT · 2 marks
A periodic variable xx is shown in the figure as a function of time. The root-mean-square (rms) value of xx is _______.
Official PYQ2014Analog CircuitsDiode CircuitsMCQ · 2 marks
The diode in the circuit shown has VonV_{on}=0.7= 0.7 Volts but is ideal otherwise. If Vi=5sin⁡(ωt)V_{i}= 5 \sin ( \omega t )Volts, the minimum and maximum values of VoV_{o} (in Volts ) are, respectively,