Punjab Technical University 2009-5th Sem B.Tech Electronics and Communications Engineering LIC- ( ) - Question Paper

LINEAR INTEGRATED CIRCUITS(2009)

part A

Q1.
(A) Draw the circuit diagram of an OPAMP integrator. Mention its application.
(B) Compare ideal and practical characteristics of an op-amp.
(C) What is zero crossing detector?
(D) Mention the application of analog multiplier.
(E) Define slew rate of an op-amp.
(F) What are the important specification of ADC and DAC.
(G) An inverting amplifier with the gain of two is driver by +/- 10v peak to peak triangular waVes. Sketch the voltage available at output and non inverting terminal of the op-amp.
(H) Define input offset and CMRR for an op-amp.
(I) What is VCO? provide 2 applications that require VCO.
(J) What are advantages of adjustable voltage regulator over fixed voltage regulator.

part B

Q2. (a) An 741 op-amp working in inverting mode has Ri =10kohm ,r2=20kohm and Vin=3V driver a load resistance of 2kohm. If IQ =0.5 mA then obtain Icc, Iee and the putput current.
(b) An 741 op-amp ishaving R1=22kohm , Rf= 2.2 Mohm. If it is having a base current of 80 nA and input offset current of 20nA. obtain the output fault voltage in the presence and absence of ROM.
Q3. What is instrumentation amplifier. List its atleast 2 applications.
Q4. discuss momostable and astable multivibrator in brief.
Q5. discuss VCO in brief.
Q6. Draw the circuit diagram of differential amplifier with 1 op-amp and exsplain its working. compute CMRR.

part C

Q7. Draw thethe circuit of a triangular wave generator using lesser number of components and discuss its working.
Q8. explain the subsequent
(A) V to I and I to V convertors.
(B) Second order HP butterworth filter
(C) Voltage series and voltage shunt feedback amplifier.
(D) CE-CB configuration
Q9. discuss in detail about voltage regulator and its kinds.

Earning:   Approval pending.