PYQs Based Test - 05 : Analog Electronics

The condition for oscillation in a feedback oscillator circuit is that at the frequency of oscillation, initially the loop gain is greater than unity while the total phase shift around the loop in degree is

If the diodes in the circuit shown are ideal and the breakdown voltage V${}_Z$ of the Zener diode is 5 V, the power dissipated in the 100 Ω resistor (in watts) is_____

The diode used in the circuit has a fixed voltage drop of 0.6 V when forward biased. A signal vs is given to the ideal OpAmp as shown. When vs is at its positive peak, the output (vOA) of the OpAmp in volts is _______.

Assuming the Op-Amp shown in the figure to be ideal, the frequency at which the magnitude of Vₒ will be 95% of the magnitude of Vᵢₙ is ________ kHz. (Take C = 10 nC)

In the circuit shown, the voltage source V(t) = 15 + 0.1 sin (100t) volts. The PMOS transistor is biased such that it is in saturation with its gate-source capacitance being 4 nF and its transconductance at the operating point being 1 mA/V. Other parasitic impedances of the MOSFET may be ignored. An external capacitor of capacitance 2 nF is connected across the PMOS transistor as shown. The input impedance in mega ohm as seen by the voltage source is__________ MΩ.