PYQs Based test 18: Analog Electronics

The op-amp shown in the figure is ideal. The input impedance $\frac{v_{in}}{i_{in}}$ is given by

In the following circuit, the transistor is in active mode and $V_C=2V$. To get $V_C=4V$, we replace $R_C$ with $R{}_C^{\prime }$. Then the ratio $R{}_C^{\prime }/R_C$ is_____.

In the following circuit, the input voltage $V_{in}$ is $100sin\left(100\pi t\right)$. For $100\pi RC=50$, the average voltages across $R$ (in volts) under steady-state is nearest to

A CMOS Schmitt-trigger inverter has a low output level of 0 V and a high output level of 5 V. It has input thresholds of 1.6 V and 2.4 V. The input capacitance and output resistance of the Schmitt-trigger are negligible. The frequency of the oscillator shown is ______ Hz. (Round off to 2 decimal places.)

The approximate transfer characteristic for the circuit shown below with an ideal operational amplifier and diode will be