Indian Institute of Technology Bombay 1 ANALOG AND RF DESIGN AT EE DEPARTMENT, IITB Dinesh Sharma.
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Transcript of Indian Institute of Technology Bombay 1 ANALOG AND RF DESIGN AT EE DEPARTMENT, IITB Dinesh Sharma.
Indian Institute of Technology Bombay
1
ANALOG AND RF DESIGNANALOG AND RF DESIGNAT EE DEPARTMENT, IITBAT EE DEPARTMENT, IITB
Dinesh SharmaDinesh Sharma
Indian Institute of Technology Bombay
2
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
Indian Institute of Technology Bombay
3
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)
Academia Industry Meet 2002, Electrical Engineering Department
Indian Institute of Technology Bombay
4
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
Academia Industry Meet 2002, Electrical Engineering Department
Indian Institute of Technology Bombay
5
Nyquist Rate Data Converters …Nyquist Rate Data Converters …
A Multi Channel Analyser using a DLL as a timing vernier.
(R.S. Saxena-DKS)
Academia Industry Meet 2002, Electrical Engineering Department
Indian Institute of Technology Bombay
6
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)
Academia Industry Meet 2002, Electrical Engineering Department
Indian Institute of Technology Bombay
7
A High Speed Sigma-delta AtoDA High Speed Sigma-delta AtoDwith Adaptive correctionwith Adaptive correction
Academia Industry Meet 2002, Electrical Engineering Department
Indian Institute of Technology Bombay
8
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)
Academia Industry Meet 2002, Electrical Engineering Department
Indian Institute of Technology Bombay
9
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)
Academia Industry Meet 2002, Electrical Engineering Department
Indian Institute of Technology Bombay
10
RF Design (Receivers.)RF Design (Receivers.)
• Dual Band Receiver Design
(A.G. Krishnakanth – DKS)
• LNA design for GPS RF receivers
(Shailendra Sharad-ANC)
Academia Industry Meet 2002, Electrical Engineering Department
Indian Institute of Technology Bombay
11
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
Academia Industry Meet 2002, Electrical Engineering Department
Indian Institute of Technology Bombay
12
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)
Academia Industry Meet 2002, Electrical Engineering Department
Indian Institute of Technology Bombay
13
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)
Academia Industry Meet 2002, Electrical Engineering Department
Indian Institute of Technology Bombay
14
Other Analog DesignsOther Analog Designs
• Design of an Analog Array (S. Pullaiah-ANC)
• Analog characterisation of metastability in latches
(Dr. Shojaei –MPD)
Academia Industry Meet 2002, Electrical Engineering Department
Indian Institute of Technology Bombay
15
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)
Academia Industry Meet 2002, Electrical Engineering Department
Indian Institute of Technology Bombay
16
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
Academia Industry Meet 2002, Electrical Engineering Department