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00000CS 207121903

PART 0
Answer any two full questions, each carries 9 marks.
Why is potential divider biasing more stable and independent of transistor
characteristics than other biasing arrangements.
Design a transistor based circuit for generating a square wave of | KHz.
Design an amplifier using self biasing for maximum output swing of
approximately 10V and maximum collector current of 1 mA. Given B=100,
۷ ‏,0.7۷حوم‎ draw the circuit using the designed components.
Draw the circuit diagram of a monostable multivibrator and explain its
working.
Design a transistor based Wien bridge oscillator for an output frequency of
5 KHz. Draw the circuit using the designed components.
Draw the circuit diagram of a common source MOSFET amplifier and
explain its working.
PART 1:
Answer any four full questions, each carries 10 marks.
With necessary figures, explain the concept of ‘virtual ground’ in an
operational amplifier.
Design a second order active low pass filter for 2.5 KHz, with a pass band
gain of 4dB. Draw the circuit with the designed components.
Compare the characteristics of an ideal operational amplifier with IC741.
Design a first order active high pass filter for 3.3 KHz, with a pass band
gain of 3dB. Draw the circuit with the designed components.
Design a Schmitt trigger circuit using an operational amplifier when input
voltage, |Vin| > 3۷۰ Assume an op-amp power supply voltage of +12 V.
Draw the circuit diagram and relevant waveforms.
Prove that a weighted resistor network can convert a digital signal to analog
signal. What are the drawbacks of this converter?
With the help of a circuit diagram and necessary equations, show how an
operational amplifier can be used to find the difference between two
voltages.
With the help of necessary figures, explain the working of a 2 bit flash
ADC.

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