Thapar University 2006 B.Tech Electronics and Communications Engineering Linear integrated circuit & Applications - Question Paper
Thapar Institute of Engineering & Technology
B.Tech ECE (3rdYear)
Final Term exam
EC017 (Linear integrated circuit & Applications)
THAPAR INSTITUTE OF ENGINEERING & TECHNOLOGY, PATIALA Electronics and Communication Engineering Department End Semester Examination EC-017 (Linear Integrated Circuits & Applications) BE (ECE) Third Year Max Marks: 36 Instructor: Dr. Harish Singla Time allowed: 3Hrs Note: Attempt any four questions Section-A and Section-B. Assume suitable data if required. All notations/characters carry their usual meanings. All parts of a question should be attempted at one place._
1. I. What is a resistance translator? Draw its circuit diagram, explain its advantage and working.
II. An inverting amplifier with gain of 2 is driven by 10 V peak-to-peak triangular wave. Sketch the voltages available at output and non -inverting terminal of the Op-amp.
III. Distinguish between Slew Rate and Rise time.
IV. What is PLL? Explain its working with the help of a block diagram.
V. Design a 60 Hz twin-T notch filter. 2X4=8
Section-B (Attempt any four)
(a) List and explain the parameters of an operational amplifier that should be considered for ac applications.
(b) An 741 Op-amp working in inverting mode has Rj = 10 KQ, Rp - 20 KQ and Vin = 3V drives a load resistance of 2 KQ. If Iq = 0.5 mA, then find Ice. Iee and the output current. (4,3)
(a) Why we use feedback. Derive for voltage gain, input resistance & output resistance for Voltage shunt feedback amplifier.
(b) The circuit shown Figure-1 employs 741 Op-amp and R = 10 KQ and Vjn = 5V. If Op-amp is having saturation voltages of 13V. Find the output current and voltage compliance. (4,3)
|
L - |
 |
Figure-1
Figure-2
How an open loop op-amp can be used as a comparator. List and explain its limitations and how these can be overcomed.
The circuit shown Figure-2 employs 741 Op-amp specify suitable component values to achieve a comer frequency of 1 KHz and a gain of 20 dB with input impedance of 10 KQ. At what frequency does the gain drops to unity. (4,3)
What is a voltage regulator. How its performance is evaluated. Explain adjustable voltage regulators.
An 741 Op-amp is having Rj = 22 KQ, Rp = 2.2 MQ. If it is having a base current of 80 nA and input offset current of 20 nA. Find the output error voltage in the presence and absence of Rom. (4,3)
What is Instrumentation Amplifier. List its at least two applications. Using 741 Op-amps and other components, design a 60 dB audio amplifier and sketch the magnitude plots of the final circuit. (4,3)
|
Attachment: |
| Earning: Approval pending. |
