Recent questions tagged amplifier / GO Electronics

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GATE ECE 2024 | Question: 8
For the closed loop amplifier circuit shown below, the magnitude of open loop low frequency small signal voltage gain is $40$. All the transistors are biased in saturation. The current source $I_{S S}$ is ideal. Neglect body effect, channel length modulation and intrinsic device ... off to three decimal places) is $\_\_\_\_\_\_$. $0.976$ $1.000$ $1.025$ $0.488$

For the closed loop amplifier circuit shown below, the magnitude of open loop low frequency small signal voltage gain is $40$. All the transistors are biased ...

admin

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admin asked Feb 16

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GATE ECE 2016 Set 2 | Question: 15
Which one of the following statements is correct about an ac-coupled common-emitter amplifier operating in the mid-band region? The device parasitic capacitances behave like open circuits, whereas coupling and bypass capacitances ... The device parasitic capacitances behave like short circuits, whereas coupling and bypass capacitances behave like open circuits.

Which one of the following statements is correct about an ac-coupled common-emitter amplifier operating in the mid-band region?The device parasitic capacitances behave li...

Milicevic3306

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Milicevic3306 asked Mar 27, 2018

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GATE ECE 2014 Set 4 | Question: 37
Consider the common-collector amplifier in the figure (bias circuitry ensures that the transistor operates in forward active region, but has been omitted for simplicity). Let $I_C$ be the collector current, $V_{BE}$ be the base-emitter voltage and $V_T$ be the ... of values of $R_E$? $g_mR_E <<1$ $I_CR_E>>V_T$ $g_mr_o>>1$ $V_{BE}>>V_T$

Consider the common-collector amplifier in the figure (bias circuitry ensures that the transistor operates in forward active region, but has been omitted for simplicity)....

Milicevic3306

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Milicevic3306 asked Mar 26, 2018

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GATE ECE 2014 Set 3 | Question: 11
The desirable characteristics of a transconductance amplifier are high input resistance and high output resistance high input resistance and low output resistance low input resistance and high output resistance low input resistance and low output resistance

The desirable characteristics of a transconductance amplifier are high input resistance and high output resistancehigh input resistance and low output resistancelow input...

Milicevic3306

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Milicevic3306 asked Mar 26, 2018

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GATE ECE 2014 Set 2 | Question: 12
In the differential amplifier shown in the figure, the magnitude of the common-mode and differential-mode gains are $A_{CM}$ and $A_{d},$ respectively. If the resistance $R_{E}$ is increased, then $A_{cm}$ increases common-mode rejection ratio increases $A_{d}$ increases common-mode rejection ratio decreases

In the differential amplifier shown in the figure, the magnitude of the common-mode and differential-mode gains are $A_{CM}$ and $A_{d},$ respectively. If the resistance ...

Milicevic3306

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Milicevic3306 asked Mar 26, 2018

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GATE ECE 2018 | Question: 1
Two identical $\text{nMOS}$ transistors $M_{1}$ and $M_{2}$ are connected as shown below. The circuit is used as an amplifier with the input connected between $\text{G and S}$ terminals and the output taken between $D\: \text{and}\: S$ terminals. $V_{bias}$ and $V_{D}$ are ... $g_{m}\approx g_{m1} \:\:\text{and}\:\: r_{o}\approx r_{o2}$

Two identical $\text{nMOS}$ transistors $M_{1}$ and $M_{2}$ are connected as shown below. The circuit is used as an amplifier with the input connected between $\text{G an...

gatecse

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gatecse asked Feb 19, 2018

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GATE ECE 2017 Set 1 | Question: 15
A good transconductance amplifier should have high input resistance and low output resistance low input resistance and high output resistance high input and output resistances low input and output resistances

A good transconductance amplifier should havehigh input resistance and low output resistancelow input resistance and high output resistancehigh input and output resistanc...

admin

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admin asked Nov 17, 2017

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GATE ECE 2017 Set 1 | Question: 14
The Miller effect in the context of a Common Emitter amplifier explains An increase in the low-frequency cutoff frequency An increase in the high-frequency cutoff frequency A decrease in the low-frequency cutoff frequency A decrease in the high -frequency cutoff frequency

The Miller effect in the context of a Common Emitter amplifier explainsAn increase in the low-frequency cutoff frequencyAn increase in the high-frequency cutoff frequency...

admin

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admin asked Nov 17, 2017

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GATE ECE 2017 Set 1 | Question: 13
A good transconductance amplifier should have High input resistance and low output resistance Low input resistance and high output resistance High input and output resistance Low input and output resistance

A good transconductance amplifier should haveHigh input resistance and low output resistanceLow input resistance and high output resistanceHigh input and output resistanc...

admin

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admin asked Nov 17, 2017

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GATE ECE 2017 Set 1 | Question: 12
For the operational amplifier circuit shown, the output saturation voltage are $\pm 15 \:V$. The upper and lower threshold voltages for the circuit are,respectively, $+ 5 \: V$ and $– 5 V$ $+ 7 \: V$ and $– 3 \: V$ $+ 3 \: V$ and $- 7 \: V$ $+ 3 \: V$ and $– 3 \: V$

For the operational amplifier circuit shown, the output saturation voltage are $\pm 15 \:V$. The upper and lower threshold voltages for the circuit are,respectively,$+ 5 ...

admin

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admin asked Nov 17, 2017