Indian Institute of Technology Bombay 1 ANALOG AND RF DESIGN AT EE DEPARTMENT, IITB Dinesh Sharma

Indian Institute of Technology Bombay

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ANALOG AND RF DESIGNANALOG AND RF DESIGNAT EE DEPARTMENT, IITBAT EE DEPARTMENT, IITB

Dinesh SharmaDinesh Sharma


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Faculty MembersFaculty Members

• Prof. A.N. Chandokar (ANC)

• Prof. M.P. Desai (MPD)

• Prof. M.B. Patil (MBP)

• Prof. R. Lal (RL)

• Prof. D.K. Sharma (DKS)

• Prof. J. Vasi (JV)

Academia Industry Meet 2002, Electrical Engineering Department


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AREAS OF INTERESTAREAS OF INTEREST

• Data Converters (DKS/ANC/MPD)

• Low Voltage/Low Power Design (ANC/DKS)

• RF Transmitters and Receivers (ANC/DKS)

• PLL and DLL circuits (ANC)

• Broadband Communications related circuits (ANC/DKS)

• Modeling and Simulation for RF, Analog (JV/MBP)



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DATA CONVERTERSDATA CONVERTERS(Nyquist Rate)(Nyquist Rate)

Comparator design for a high speed 14 bit

SAR A to D converter (S. Bapat – DKS)

• Student support from TI

• Design is now a part of TI product

(14 bit, 400 KSPS, Noise < 40 V)

• Implemented as a 4 stage offset corrected circuit



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Nyquist Rate Data Converters …Nyquist Rate Data Converters …

A Multi Channel Analyser using a DLL as a timing vernier.

(R.S. Saxena-DKS)



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Sigma Delta ADCsSigma Delta ADCs

• Architecture and Design(R. Ghayal-MPD, Dudhe-ANC, S. Mehta-DKS)

• High Speed Sigma Delta converter with multi-bit quantization and Adaptive correction

(L. Kumath, A. Gupta – DKS)



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A High Speed Sigma-delta AtoDA High Speed Sigma-delta AtoDwith Adaptive correctionwith Adaptive correction



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Low Voltage / Low Power DesignLow Voltage / Low Power Design

• Current mode analog design (Srinjoy Mitra-ANC)

• Dynamic design style for analog and adaptive biasing

(Anirudh Ralli –DKS)



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R.F. DesignR.F. Design

• Transmiter Design:

Design of High Efficiency RF Power

Amplifiers(A. Kotwal, Harishchandra, S.P. Taigor – ANC)

• Receiver Design:

Cable modem receiver design (S. Seth, V. Babu – ANC)



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RF Design (Receivers.)RF Design (Receivers.)

• Dual Band Receiver Design

(A.G. Krishnakanth – DKS)

• LNA design for GPS RF receivers

(Shailendra Sharad-ANC)



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Design of Various Sub-modulesDesign of Various Sub-modules

• Complete Transistor level design of all the modules

• Simulations using Cadence Design Tool (0.35µ Technology)

• BSIM3v3 model with ELM=5, NQSMOD=1, NOIMOD=2

Dual-band Receiver

Dual-band LNA Gilbert Mixer 3.85G Quadrature VCO

Bandpass amplifier

Gilbert Mixer 1.37G tunable Quad. VCO

Fractional-NSynthesizer

Variable GainAmplifier

Baseband Filter

Quadrature I and Q outputs



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PLL and DLL DesignPLL and DLL Design

• Design of PLL and DLL circuits at RF

(K. Kothari, H. Kothari, R. Kedilaya –ANC)

• Use of DLLs for accurate timing(R.S. Saxena-DKS)

• Jitter and Phase Noise in VCO’s (K. Narasimhulu-DKS)



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Broad band Communications CircuitsBroad band Communications Circuits

• Analog Viterbi Decoder (Saurabh Mittal-ANC)

• Implementation of Orthogonal Frequency Division Multiplexing

(P.Mishra – DKS)

• Fast pipelined ADCs for OFDM receivers (P. Shamsukha-DKS)



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Other Analog DesignsOther Analog Designs

• Design of an Analog Array (S. Pullaiah-ANC)

• Analog characterisation of metastability in latches

(Dr. Shojaei –MPD)



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Modeling and SimulationModeling and Simulation

• Compact models for MOS Transistors for simulation at RF

(JV)

• Simulator for Switched Capacitor circuits

(MBP)

• Macro-models for analog components

(P. Singh, A. Mishra – MBP)



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Focus for Future ProjectsFocus for Future Projects

• Fast Data converters (Nyquist rate and sigma-delta architectures)

• RF circuits for communications

• Integration with MEMS activity

• Low Power analog and mixed signal design

• Silicon foundry experience for selected designs


Documents

Indian Institute of Technology Bombay 1 ANALOG AND RF DESIGN AT EE DEPARTMENT, IITB Dinesh Sharma