Analog Circuits

JFET can be operated with

1. negative gate only
2. gate voltage only
3. positive as well as negative gate voltage
4. none of the above

Which power amplifier has the highest collector efficiency

1. C
2. A
3. B
4. AB

Which amplifier is used for 180-degree phase shift

1. differential amplifier
2. non inverting amplifier
3. inverting amplifier
4. None of the above

A MOSFET has three terminals, namely

1. cathode, anode, grid
2. source, gate, drain
3. emitter, base, collector
4. none of the above

The maximum efficiency of resistance loaded class B power amplifier is

1. 5%
2. 50%
3. 30%
4. None of the above

A JFET is also called _______ transistor

1. unipolar
2. bipolar
3. injunction
4. none of the above

In a phase shift oscillator, the frequency determining elements are

1. L and C
2. R, L and C
3. R and C
4. None of the above

The leakage current across a pn junction is due to

1. Minority carriers
2. Majority carriers
3. Junction capacitance
4. None of the above

An oscillator converts

1. c. power into d.c. power
2. c. power into a.c. power
3. mechanical power into a.c. power
4. none of the above

In a transistor

1. I_E= I_C− I_B
2. I_B= I_C+ I_E
3. I_C= I_E+ I_B
4. I_E= I_C+ I_B

In a full wave rectifier, the input is from 30-0-30V transformer. The load and diode forward resistances are 100Ω and 10Ω respectively. Calculate the average voltage, dc output power, ac input power, rectification efficiency and percentage regulation.

Explain the working of positive clamping circuit.

Draw the common emitter circuit and sketch the input and output characteristics. Also explain active region, cutoff region and saturation region by indicating them on the characteristic curve.

With a neat circuit diagram explain the Voltage Divider Bias circuit by giving its exact analysis.

Explain the characteristics of an Ideal Op-Amp. Mention some of the applications of Op-Amp.

Explain R-2R ladder DAC with example?

Explain Successive type ADC with neat circuit diagram.

Describe the construction and operation of JFET and draw its characteristics.

Explain Colpitts oscillator with Circuit diagram and derive its frequency.

Explain RC coupled transistor amplifier with neat circuit diagram in a middle frequency Range.

Explain RC- phase shift oscillator using op-amp and derive its frequency.

Describe the construction and operation of depletion type MOSFET and draw its characteristics.

Describe class A Power Amplifier. Derive the expression for its maximum conversion Efficiency.

Explain Wien bridge oscillator using op-amp and derive its frequency.

Explain MOSFET as an amplifier?

Describe class B Power Amplifier. Derive the expression for its maximum conversion Efficiency.