SRM University 2007 B.Tech Electronics and Communications Engineering BANK FOR LINEAR INTEGRATED CIRCUITS - Question Paper

43. With neat sketches, discuss the response of I order High Pass Filter. Derive an expression for the critical frequency. (5 Marks)
44. With neat sketches, discuss the response of II order High Pass Filter. Derive an expression for the critical frequency.
45. With neat sketches, discuss the band pass response. discuss the significance of the Quality factor. Determine the critical frequency, bandwidth and damping factor of Band pass filter.
46. Analyze a multiple feedback Band pass filter to determine centre frequency, bandwidth and gain.
47. What is a state variable filter? discuss the basic operation of a state variable BPF. Draw the response curve and analyze it.
48. Explain band stop response. How do you classify Band stop response? How do you realize every of them? discuss with neat sketches of circuit diagram and frequency response curve.
49. A PLL is locked on to an incoming signal with a frequency of 1MHz at a phase angle of 50 deg. The VCO signal is at a phase angle of 20 deg. The peak amplitude of the incoming signal is 0.5V and that of the VCO output signal is 0.7V. (5 Marks)
a. What is VCO frequency?
b. What is the value of the control voltage being feedback to the VCO at this point?
50. Draw the circuit of a PLL AM detector and FM Demodulator and discuss its operation.
51. Draw the circuit of a frequency multiplier/divider using PLL & discuss its operation. (5 Marks)
52. What is PLL? Draw the block schematic of PLL and discuss its operation.
53. What is VCO? What is the purpose of VCO? Draw the block diagram and connection diagram of IC 566 VCO and discuss. find an expression for frequency of oscillation.
54. In the connection diagram of VCO shown below, +V = 12V, R2 = 1.5KO, R1=R3=10KO and C1=0.001?F.
a. Determine the nominal frequency of output waveform
b. Compute the modulation frequency in the output frequency if control voltage is varied ranging from 9.5V and 11.5V. (5 Marks)

UNIT – IV ADC AND DAC
PART – A
1. What is the function of DAC and ADC?
2. Classify DACs.
3. Classify ADCs.
4. Name the essential parts of a DAC.
5. Why is an inverted R-2R ladder network DAC better than R-2R ladder DAC?
6. Which is the fastest ADC and why?
7. What is the major source of inaccuracy associated with D/A converter?
8. Which kind of D/A converter is most sensitive to variations of the input voltage during a conversion?
9. Draw the symbol of n bit D/A converter. What is the number of various output levels that can be produced by a provided DAC?

Earning:   Approval pending.