Op-Amp-EE

Which one of the following statements is true about the small signal voltage gain of a MOSFET based single stage amplifier?

For an ideal MOSFET biased in saturation, the magnitude of the small signal current gain for a common drain amplifier is

Of the four characteristics given below, which are the major requirements for an instrumentation amplifier? P. $$\,\,\,\,$$High common mode rejection ratio Q. $$\,\,\,\,$$High input impedance R. $$\,\,\,\,$$High linearit...

When a bipolar junction transistor is operating in the saturation mode, which one of the following statements is TRUE about the state of its collector-base (CB) and the base-emitter (BE) junctions?

A low pass filter with a cut-off frequency of $$30Hz$$ is cascaded with a high pass filter with a cut off frequency of 20Hz. The resultant system of filters coil function as

The typical frequency response of a two-stage direct coupled voltage amplifier is as shown in figure

A diode whose terminal characteristics are related as $${i_D} = {{\rm I}_S}\,{e^{{V \over {{V_T}}}}},\,$$ where $${{\rm I}_S}$$ is the reverse saturation current and $${V_T}$$ is thermal voltage ($$25$$ $$mV$$) is biased...

An op-amp, having a slew rate of $$62.8$$ $$V/\mu \,$$sec, is connected in a voltage follower configuration. If the maximum amplitude of the input sinusoidal is $$10$$ Volts. Then the minimum frequency at which the slew...

A sample-and-hold $$(S/H)$$ circuit, having a holding capacitor of $$0.1$$ $$nF,$$ is used at the input of an $$ADC$$ (analog-to-digital converter). The conversion time of the $$ADC$$ is $$1\,\,\mu \sec ,$$ and during th...

An $$N$$-channel $$JFET$$ having a pinch-off voltage $$\left( {{V_P}} \right)$$ of $$-5V$$ shows a transconductance (gm) of $$1$$ $$mA/V$$ when the applied Gate to source voltage $$\left( {{V_{GS}}} \right)$$ is $$-3V.$$...

An op-amp has an open-loop gain of $${10^5}$$ and an open-loop upper cutoff frequency of $$10$$ $$Hz.$$ If this op-amp is connected as an amplifier with a closed-loop gain of $$100,$$ then the new upper cutoff frequency...

An active filter consisting of an op-amp, resistor $${R_1},\,\,{R_2},\,\,{R_3}$$ and two capacitors of value $$C$$ each, has a transfer function $$T\left( s \right) = {{{{ - s} \over {\left( {{R_1}C} \right)}}} \over {{s...

An analog electronic circuit that measures $$rms$$ value of the input voltage by averaging the square of the instantaneous voltage level, responds slowly to changes in the input signal due to

The type of power amplifier which exhibits crossover distortion in its output is

As temperature is increased, the voltage across a diode carrying a constant current.

One of the applications of current mirror is

A major advantage of active filters is that they can be realized without using

The depletion region (or) space charge region (or) transition region in a semiconductor $$p-n$$ junction diode has

The common mode voltage of a unity gain (voltage follower) op-amp buffer in terms of its output voltage $${V_0}$$ is __________.

The number of comparisons carried out in a $$4$$-bit flash type $$A/D$$ converter is

A practical $$R$$-$$C$$ sinusoidal oscillator is built using a positive feedback amplifier with a closed loop gain slightly less than unity.

The voltage series feedback in a feedback amplifier leads to

In an $$RC$$- coupled common Emitter amplifier which of the following is true?

In a common Emitter amplifier, the un bypassed emitter resistance provides

An ideal op-amp is used to make an inverting amplifier. The two input terminals of the op-amp are at the same potential because