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Posted By: Sree.... Member Level: Diamond Posted Date: 14 Mar 2008
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2007 Andhra Pradesh State Jawaharlal Nehru Technological University B.Tech LINEAR AND DIGITAL IC APPLICATONS(R05) Set No 3 Question paper
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Code No: R05220202 Set No. 3
II B.Tech II Semester Regular Examinations, Apr/May 2007
LINEAR AND DIGITAL IC APPLICATONS
( Common to Electrical & Electronic Engineering and Instrumentation &
Control Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) Explain the open loop and closed loop operations of an Op-amp.
(b) Explain different methods to increase the input resistance of an Op-amp.[8+8]
2. (a) Discuss the functioning of a practical integrator and derive the necessary ex-
pressions.
(b) Design a practical integrator circuit to properly process input sinusoidal wave
forms up to 1 KHz. The input amplitude is 10mV. [8+8]
3. (a) Explain the operation of a delay equalizer circuit with neat sketches. Derive
an expression relating input and output voltages of the equalizer.
(b) For the all pass filter, determine the phase shift between input and output at
f=2 KHz.
(c) Give the condition for oscillations? [6+6+4]
4. (a) What is the phase-Locked loop? Briefly explain the roles of Low-pass filter
and VCO in PLL.
(b) Explain an application in which the 555 timer can be used as Astable multi-
vibrator. [8+8]
5. (a) Explain the operation of a dual slope type Analog to Digital converter.
(b) A dual slope Analog to Digital converter uses a 16-bit counter and operates
at 4 MHz clock rate. The maximum input voltage is +8volts. Find the value
of integrator resistor ‘R’ if the maximum output voltage of the integrator is
-6V after 2n counts for an integrator capacitor of 0.1µF. [8+8]
6. List out standard TTL Characteristics and explain them briefly with necessary
diagrams. [16]
7. (a) Design a 3 input 5-bit multiplexer? Write the truth table and draw the logic
diagram.
(b) Write short notes on full subtractor. [8+8]
8. (a) Discuss in detail ROM access mechanism with the help of timing waveforms?
(b) Write short notes on Clocked T flip flop. [8+8]
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