B.TECH - Semester 4 analog integrated circuits Question Paper 2019 (jun)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- 406 : ANALOG INTEGRATED CIRCUITS (T) Time : 3 Hours Max. Marks : 100 PART - A Answer all questions. Each question carries 2 marks.
- Define slew rate and write an expression for it.
- List two practical applications of V to I converters.
- Draw the circuit of a regenerative comparator in non-inverting mode.
- What is meant by biquadratic filter?
- Give the representation of a positive impedance converter. Mention one application of PIC.
- Mention two advantages of switched capacitors as resistor.
- Define resolution and accuracy of a DAC.
- Discuss the principle of over sampled ADC.
- What is a four quadrant multiplier?
- How current boosting can be achieved with IC723? Answer any one questions from each Module.
- (a) Using just one op amp powered from $\pm 12 \mathrm{~V}$ regulated supplies, design a circuit to yield (i) $V_{O}=10 V_{1}+5$ (ii) $V_{O}=10\left(V_{2}-V_{1}\right)-5$.
- (b) Design a four-input amplifier to obtain $V_{Q}=4 V_{A}-3 V_{B}+2 V_{C}-V_{D}$. Minimize the number of resistors you use.
- (a) Draw the circuit of a precision full wave rectifier and explain its working with relevant mathematical details.
- (b) Draw the circuit diagram of a differential instrumentation amplifier with a transducer bridge and show that the output voltage is proportional to the change in resistance.
- (a) Draw the circuit of an inductance simulator and derive expression for the inductance simulated. Discuss one of its applications with schematic.
- (b) For a unity gain Sallen-Key low pass filter with cut-off frequency 8 kHz and Q factor of 2. Design the filter.
- (a) Using OP-AMP current to voltage converter, explain how short circuit current can be measured?
- (b) Design a Schmitt trigger circuit for a UTP of 6 V and LTP of 4 V .
- (a) Explain with a circuit diagram working of a counter ramp ADC.
- (b) A linear amplifier and ADC are used to encode analog signal in the range of 1 mV to 10 V . The quantization error is to be limited to $1 \%$. Find the number of bits required in the ADC.
- (c) Give the functional diagram of AD 670 and explain.
- (a) Draw the circuit diagram of a switched capacitor integrator and show that the cut-off frequency depends on clock frequency and ratio of capacitors.
- (b) With a diagram explain the working principle of a 4-bit weighted resistor DAC. Derive expression for the analog output voltage.
- (a) Explain the functional block of 565 PLL.
- (b) Derive capture range and lock range of a PLL.
- (c) How PLL can be used for 1 FM detection?
- (a) Design a +9 V regulator using LM 723 . Use a current limit of 100 mA .
- (b) Design a regulator using LM 7.23 for $5 \mathrm{~V}, 500 \mathrm{~mA}$ with fold back protection.