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00000EE203121901

Derive the expression for output impedance and voltage gain of a Common
Source JFET Amplifier.
Draw the circuit of a BJT in potential divider bias configuration. Derive the
expression for Q point voltage and current.
Explain the high frequency hybrid pi model of a common emitter transistor.
PART C
Answer any two full questions, each carries 10 marks.
Explain the concept of virtual short in op-amps.
Draw the circuit diagram of Colpitt’s Oscillator and explain its principle of
operation.
What is the concept of negative feedback and draw the schematic diagrams of
four basic negative feedback configurations.
What is class A operation and derive the expression for conversion efficiency of
a transformer coupled class A power amplifier.
Draw the circuit diagram of a two stage direct coupled transistor amplifier.
Mention its advantages and application.
Derive the expression for frequency of oscillation of a wien bridge oscillator
using BJT.
PART D
Answer any two full questions, each carries 10 marks.
Analyse the operation of a precision rectifier using op-amp using circuit
diagram and waveforms.
Design an adder circuit using an op-amp to get the output expressions as
Vou -C(V}+5V2+25V3), where V;, V2 and ‏ولا‎ are the inputs. Given that ‏0م‎
‎kQ.
‎With the help of a neat diagram explain the operation of monostable
multivibrator using 555 IC.
Draw the circuit diagram and explain the working of a ramp generator using
opamp.

Explain the effect of slew rate of opamp on waveform generation.

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