Cochin University of Science and Techology (CUST) 2008 B.Tech Electronics and Communications Engineering LINEAR INTEGRATED CIRCUITS - Question Paper

LINEAR INTEGRATED CIRCUITS (NOVEMBER 2008)


1a. discuss Dominant Pole Compensation and Pole Zero Compensation
b. Draw a differential amplifer with active load. Why is this kind of load preferred?
2a. Draw and discuss the working of a current mirror circuit with necessary equations. How does it work as a constant current source?
b. Compare and contrast an ideal op-amp with 741 op-amp
3a. Derive expression for closed loop gain, input impedance and output impedance of an inverting amplifier with feedback
b. Briefly discuss virtual ground concept
4a. Draw the circuit of an instrumentation amplifier. discuss its features and applications
b. Draw and discuss the working of a current to voltage converter with necessary equations. What is its application?
5a. With neat circuit diagrams and waveforms discuss the working of Monostable Multivibrator using op-Amp
b. Draw the circuit of Weinbridge oscillator using op-amp. Derive expression for its frequency of oscilations.
6a. Why is regenerative feedback applied often in comparators? discuss considering a circuit with and without regenerative feedback
b. Draw and discuss the block diagram of 723 voltage regulator.
7a. Draw the circuit of Twin-T Notch filter. Derive expression for its Transfer function. What is its Transfer function
b. discuss the advantages of active filters
8a. Draw the circuit of 1st order all pass filter. Derive expresion for its Transfer function. What is its application
b. discuss the working of Switched Capacitive Filter. discuss its advantages
9a. With neat circuit diagrams and waveforms explain:
i) the 555 as Monostable Multivibrator
ii) the 555 as Astable Multivibrator
b. describe lock range and capture range
10. discuss with diagrams
i) DAC with binary weighted resistors
ii) DAC with R and 2R resistors
iii) Successive-approximation ADC

Earning:   Approval pending.