JNTU B.Tech IV ANALOG CMOS IC DESIGN Previous Question Paper (June - 2024 - R16)

Describe the key characteristics of a Metal-Oxide-Semiconductor (MOS) transistor.

Explain one important consideration in layout design for integrated circuits.

Why are current and voltage references essential in electronic circuits, and how are they typically implemented using MOS technology?

Define bandgap reference and explain its role in providing stable voltage references in MOS circuits.

What is the significance of the threshold voltage in CMOS inverters?

Explain how a current mirror circuit works and its applications.

Explain the significance of common-mode rejection ratio (CMRR) in op amp measurement.

Explain the advantages of using a two-stage op amp over a single-stage design.

Define input offset voltage and explain its significance in comparator performance.

Explain the role of positive feedback in regenerative comparators.

Describe the operation and characteristics of a Metal-Oxide-Semiconductor (MOS) transistor.

Explain the various modes of operation of Metal-Oxide-Semiconductor (MOS) and discuss its significance in modern electronic circuits.

Explain the importance of Integrated Circuit (IC) layout and design in the fabrication process of semiconductor devices.

Illustrate how small-signal parameters are extracted and utilized in electronic circuit design.

Explain the operating principles of MOS switches and MOS diodes.

Explain the concept of degeneration in MOS current mirrors.

Explain how degeneration affects the performance and stability of current mirrors.

Explain how MOS transistors can be used to create current sinks and sources.

Explain the characteristics of CMOS CS amplifier.

Design a cascode amplifier with a gain of 50 and a supply voltage of 10V using MOSFETs. Given that the transconductance of each transistor is 1 mA/V.

Derive the expression of the differential-mode voltage gain, common mode voltage gain and CMRR for a MOSFET differential amplifier.

Calculate the CMRR (Common Mode Rejection Ratio) for a differential amplifier with a differential gain of 100 and a common mode gain of 0.01.

Design a CMOS operational amplifier with a gain of 50 dB and a bandwidth of 10 MHz. Given that the supply voltage is 3.3V and the load capacitance is 10 pF.

Explain the concept of dominant pole compensation in op amp design.

Describe the test setup for measuring the input offset voltage of an op amp and calculate the offset voltage for an op amp with an input bias current of 100 nA and a differential input voltage of 1 mV.

Explain how to measure the open-loop gain and bandwidth of an op amp experimentally.

Discuss the significance of hysteresis in comparator characterization and propose a method to quantify it experimentally.

Design a two-stage open-loop comparator with a gain of 1000 and a bandwidth of 10 MHz. Assume the supply voltage is 5V.

Describe the architecture and operation of a two-stage open-loop comparator.

Design an offset cancellation circuit for an open-loop comparator using a differential pair. Assume the input offset voltage is 10 mV.