# Recent questions tagged amplifier

State the need of multistage amplifier. Draw frequency response of R-C coupled amplifier.

Define gain and bandwidth of an amplifier.

Draw diagram of class A push-pull amplifier and explain its operation.

State the need of cascade amplifier and draw circuit diagram of 2-stage direct coupled amplifier.

Compare RC coupled, transformer coupled and direct coupled amplifier based on four points.

Draw the single stage RC coupled amplifier circuit and explain its’s operation.

List the advantages of RC coupled amplifier.

State the need of cascade amplifier.

A differential amplifier has a differential gain of 28000 and CMRR is 60 dB. What will be the value of common mode gain? A) Ac = 0.125 B) Ac = 0.33 C) Ac = 3 D) Ac = 28

The unity gain bandwidth of an inverting amplifier is 10 MHz What would be the bandwidth if the gain is increased to 10 V/V? A) 100 MHz B) 1 MHz C) 10 MHz D) 1 kHz

What is the efficiency of Class-B amplifier?  A) 68.50% B) 78.50% C) 88.50% D) 98.50%

Which one of the following is another name for common-collector amplifier?  A) Source follower B) Collector follower C) Base follower D) Emitter follower

The voltage gains of the amplifier with and without feedback are 20 and 100 respectively. The percentage of negative feedback would be

An amplifier has input power of 2 microwatts. The power gain of the amplifier is 60 dB. The output power will be

A differential amplifier has a differential gain of 20,000, CMRR : 80 dB. The common mode gain is given by

An amplifier has a voltage gain of 120. To reduce distortion, 10% negative feedback is employed. The gain of the amplifier with feedback is  (1) 141 (2) 92.3 (3) 9.23 (4) 1.41

The voltage gain of a common -source JFET amplifier depends up on its  (1) Input impedance (2) Amplification factor (3) Dynamic drain resistance (4) Drain load resistance

The gain of an ideal amplifier must be

The effect of a finite gain of an operational amplifier used in an integrator is that (A) it would not integrate (B) the slope of the output will vary with time (C) the final value of the output voltage will reduce (D) there will be instability in the circuit

What type of biasing is used in CE amplifier?

What is a BJT amplifier?

How can BJT be used as an amplifier?

What do you mean by frequency response of an amplifier?

What is the advantage of differential amplifier?

What is the power amplifier?

What is the use of differential amplifier?

How does an operational amplifier work?

What is the meaning of operational amplifier?