GATE EC Analog Circuits questions

The phenomenon known as "Early Effect" in a bipolar transistor refers to a reduction of the effective base-width caused by

The input impedance $\left(\text{Z}_i\right)$ and the output impedance $\left(\text{Z}_o\right)$ of an ideal transconductance (voltage controlled current source) amplifier are

An $n$-channel depletion MOSFET has following two points on its $\mathrm{I}_\text{D}-\mathrm{V}_{\text{GS}}$ curve $\text{V}_{\text{Gs}}=0$ at $\text{I}_\text{D}=12 \mathrm{~mA}$ and $\mathrm{V}_{\mathrm{GS}}=-6$ Volts at $\mathrm{I}_{\mathrm{D}}=0$ Which of the following $\text{Q}$-points will give the highest trans-conductance gain for small …

In the circuit shown below, the switch wa connected to position $1$ at $t<0$ and at $t=0$, it is changed to position $2$. Assume that $y$ the diode has zero voltage drop and a storage time $t_{s}$. For $0 < t \leq t_{s}, \text{V}_{\text{R}}$ is given by (all in volts)

Find the correct match between Group $1$ and Group $2$ …

For the circuit shown in the following figure, the capacitor $C$ is initially uncharged. At $t=0$, the switch $S$ is closed. The voltage $V_{C}$ across the capacitor at $t=1$ millisecond is In the figure shown above, the $\text{OP AMP}$ is supplied with $\pm 15 \mathrm{~V}$ and the ground has been shown by the symbol $\nabla$.

Common Data for Questions 71, 72,73: In the transistor amplifier circuit shown in the figure below, the transistor has the following parameters: $$\beta_{\mathrm{DC}}=60, \mathrm{~V}_{\mathrm{BE}}=0.7 \mathrm{~V}, h_{n^{c}} \longrightarrow \infty, h_{f \times} \longrightarrow \infty$$ The capacitance $\mathrm{C}_{\text{c }}$ can be assumed to be infinite. …

Common Data for Questions 71, 72,73: In the transistor amplifier circuit shown in the figure below, the transistor has the following parameters: $$\beta_{\mathrm{DC}}=60, \mathrm{~V}_{\mathrm{BE}}=0.7 \mathrm{~V}, h_{n^{c}} \longrightarrow \infty, h_{f c} \longrightarrow \infty$$ The capacitance $\mathrm{C}_{\text{c }}$ can be assumed to be infinite. In …

Common Data for Questions 71, 72,73: In the transistor amplifier circuit shown in the figure below, the transistor has the following parameters: $$\beta_{\mathrm{DC}}=60, \mathrm{~V}_{\mathrm{BE}}=0.7 \mathrm{~V}, h_{n^{c}} \longrightarrow \infty, h_{f c} \longrightarrow \infty$$ The capacitance $\mathrm{C}_{\text{c }}$ can be assumed to be infinite. In …

statement for Linked Answer Questions 76 and 77 A regulated power supply, shown in figure below, has an unregulated input (UR) of $15$ Volts and generates a regulated output $V_{\text{out }}$. Use the component values shown in the figure. In the figure above, the ground has been shown by the symbol $\nabla$ The power dissipation across the transistor …

statement for Linked Answer Questions 76 and 77 A regulated power supply, shown in figure below, has an unregulated input (UR) of $15$ Volts and generates a regulated output $V_{\text{out }}$. Use the component values shown in the figure. In the figure above, the ground has been shown by the symbol $\nabla$ If the unregulated voltage increases by …

The effect of current shunt feedback in an amplifier is to

The input resistance $\text{R}_{\mathrm{i}}$ of the amplifier shown in the figure is

The cascode amplifier is a multistage configuration of

For an $\text{npn}$ transistor connected as shown in the figure, $V_{B E}=0.7$ volts. Given that reverse saturation current of the junction at room temperature $300^{\circ} \mathrm{K}$ is $10^{-13} \mathrm{~A}$, the emitter current is

The voltage $e_{0}$ indicated in the figure has been measured by an ideal voltmeter. Which of the following can be calculated?

The $\text{OP-amp}$ circuit shown in the figure is a filter. The type of filter and its cut-off frequency are respectively

In an ideal differential amplifier shown in the figure, a large value of $\left(R_{E}\right)$.

For an $n$-channel $\text{MOSFET}$ and its transfer curve shown in the figure, the threshold voltage is

The circuit using a $\text{BJT}$ with $\beta=50$ and $\mathrm{V}_{\mathrm{BE}}=0.7 \mathrm{~V}$ is shown in the figure. The base current $\mathrm{I}_{\mathrm{B}}$ and collector voltage $\mathrm{V}_{\mathrm{C}}$ are respectively