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CMOS VLSI Design Question Paper - Dec 18 - Electronics Engineering (Semester 8) - Mumbai University (MU)
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CMOS VLSI Design - Dec 18

Electronics Engineering (Semester 8)

Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Draw neat diagrams wherever necessary.

1.a. Analyze following circuit to get voltage gain equation if M2 is twice wide as that of M1 and Vin1 = Vin2

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(5 marks) 6927

1.b Explain the concept of switched capacitor circuit
(5 marks) 6966

1.c Compare performance of various op-amp topologies
(5 marks) 6934

1.d Explain System on Chip and System in Package.
(5 marks) 9255

2.a Design two stage operational amplifiers that meet the following specifications with a phase margin of 60. Assume the channel length is to 1 $\mu m$, KN'100$\mu$A/V2, KP'=10$\mu$A/V2, VTN=$\mid VTP \mid$=0.5, $\lambda _N$=0.06V-1, and $\lambda _P$=0.08V-1 A$_v$>5000v/v,Vdd= 2.5V, Vss= -2.5v, GBW=5MHz, C$_L$=10pf, SR>10v/$\mu sec$, Vout range = +/- 2V, ICMR= -1 to 2V, P$_{diss}$<=2mw.
(20 marks) 9224

3.a Derive expression for voltage gain AV and output resistance Ro of source follower stage.
(10 marks) 9210

3.b Compare full custom and semi-custom design in terms of its trade-off and applications.
(5 marks) 9257

3.c Explain Non-ideal effects in PLL.
(5 marks) 6972

4.a Derive equation of differential gain, common mode gain and CMRR of differential amplifier.
(10 marks) 9220

4.b Explain White & Flicker noise in MOSFET. Derive equation for output and input referred noise voltage of CS stage
(10 marks) 9211

5.a Draw and explain AMS design flow.
(10 marks) 9256

5.b Draw and explain discrete time integrator along with the output waveform.
(10 marks) 6966

6 Write short note on any four

6.a Band Gap references
(5 marks) 6898

6.b Cascode current mirror circuit.
(5 marks) 9202

6.c Advantages and disadvantages of DLL
(5 marks) 9254

6.d Stability and frequency compensation of two stage Opamp
(5 marks) 6938

6.e Performance parameters of VCO
(5 marks) 9252

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