EC3451 Linear Integrated Circuits
Important Questions
Unit 1
- Discuss about LF155 MOSFET operational amplifier.
- Draw the equivalent circuit of general operational amplifier and explain its working.
- List and explain the DC and DC characteristics of an operational amplifier.
- Construct the BJT differential amplifier with active load and explain its operating principle.
Unit 2
- What is the difference between clipper and clamper? Explain the circuit operations for positive clipping, negative clipping, positive clamping and negative clamping using OPAMP.
- Design a second order Butterworth low pass filter for a cutoff frequency of 2 KHz and obtain its frequency response.
- With a suitable circuit diagram, explain the operating principle of an instrumentation amplifier and derive its gain.
- Analyze the first order Low pass and High pass Butterworth filter and derive its voltage gain.
Unit 3
- Explain the operation of IC565 along with AM and FM detection.
- Explain about analog multiplier IC’s with one application.
- Illustrate the operation of VCO with neat block diagram. Also derive an expression for fo. Also give the pin details of IC565.
- Explain in detail about the various ways in which frequency synthesizers can be made from phase locked loops. Also discuss their applications.
Unit 4
- Draw the circuit of 4-bit binary weighted resistor DAC and explain with its input output timing diagram.
- With block diagram, explain the working of Dual Slope ADC and Successive Approximation ADC.
- Explain the construction and working of dual slope ADC.
- Explain the construction and working of A/D converter using voltage to time conversion.
Unit 5
- What are the types of voltage regulators? Discuss the operation of fixed and adjustable voltage regulators.
- With neat circuit diagram explain the operation of frequency to voltage and voltage to frequency converter using opamp.
- Sketch the circuit of monostable multivibrator and explain. Also derive the expression for time period.
- Describe the internal functional block diagram of IC 723 Voltage Regulator. Also explain how positive voltage is provided by IC 723 with appropriate circuit