CMOS VLSI design

Power and Energy Power is drawn from a voltage source attached to the VDD pin(s) of a chip. Instantaneous Power: P (t ) = I (t )V (t ) Energy: Average Power: 7: Power – Half the energy from VDD is dissipated in the pMOS transistor as heat, other half stored in capacitor When the gate output falls – Energy in capacitor is dumped to GND – Dissipated as heat in the nMOS transistor

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Pass Transistors DC Response Logic Levels and Noise Margins Transient Response RC Delay Models Delay Estimation .Pass Transistors We have assumed source is grounded What if source 0? VDD – e.g. pass transistor passing VDD VDD Vg = VDD – If Vs VDD-Vt, Vgs Vout = VDD – When Vin = VDD - Vout = 0 VDD – In between, Vout depends on Idsp transistor size and current Vin Vout – By KCL, must settle such that Idsn Idsn = |Idsp| – We could solve equations – But graphical solution gives more insight...

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Nonideal Transistor Behavior – High Field Effects • Mobility Degradation • Velocity Saturation – Channel Length Modulation – Threshold Voltage Effects • Body Effect • Drain-Induced Barrier Lowering • Short Channel Effect – Leakage • Subthreshold Leakage • Gate Leakage • Junction Leakage Process and Environmental Variations .Ideal Transistor I-V Shockley long-channel transistor models

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So far, we have treated transistors as ideal switches An ON transistor passes a finite amount of current – Depends on terminal voltages – Derive current-voltage (I-V) relationships Transistor gate, source, drain all have capacitance – I = C (∆V/∆t) - ∆t = (C/I) ∆V – Capacitance and current determine speed .MOS Capacitor Gate and body form MOS capacitor V Vt + inversion region depletion region .Terminal Voltages Vg Mode of operation depends on Vg, Vd, Vs + + – Vgs = Vg – Vs Vgs Vgd – Vgd = Vg – Vd Vs Vd – Vds = Vd – Vs...

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A Brief History 1958: First integrated circuit – Flip-flop using two transistors – Built by Jack Kilby at Texas Instruments  2010 – Intel Core i7 µprocessor • 2.3 billion transistors – 64 Gb Flash memory • 16 billion transistors 53% compound annual growth rate over 50 years – No other technology has grown so fast so long  Driven by miniaturization of transistors – Smaller is cheaper, faster, lower in power! – Revolutionary effects on society .Annual Sales 1019 transistors manufactured in 2008 – 1 billion for every human on the planet...

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Integrated circuits: many transistors on one chip. Very Large Scale Integration (VLSI): bucketloads! Complementary Metal Oxide Semiconductor – Fast, cheap, low power transistors Today: How to build your own simple CMOS chip – CMOS transistors – Building logic gates from transistors – Transistor layout and fabrication Rest of the course: How to build a good CMOS chip

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.Course Description • Provide students general and detail knowledge about how to build a CMOS chip • Learn and practice the Verilog (or VHDL) language for hardware programming

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Soft error is a great concern for microelectronics circuits today. With the advanced development i n CMOS technologies, VLSI circuits are becoming more sensitive to external noise sources, especially radiation particle strikes, which are the cause of soft error. Soft errors are random and do not cause the permanent failure. However, it causes the corruption of stored information, which could turn to the failure in functionality of the circuits.

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Tham khảo bài thuyết trình 'cmos vlsi design', kỹ thuật - công nghệ, điện - điện tử phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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Tham khảo bài thuyết trình 'design and implementation of vlsi systems_lecture 04: mos transistor theory', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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A Circuits and Systems perspective presents broad and in-depth coverage of the entire field of modern CMOS VLSI Design. The authors draw upon extensive industry and classroom experience to introduce today’s most advanced and effective chip design practices. They present extensively updated coverage of every key element of VLSI design, and illuminate the latest design challenges with 65 nm process examples. This book contains unsurpassed circuit-level coverage, as well as a rich set of problems and worked examples that provide deep practical insight to readers at all levels....

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Introduction to CMOS VLSI Design Design for Low Power

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