Low Power Design in CMOS Digital Integrated Circuits

Low Power Design in CMOS Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Why worry about power? -- Heat Dissipation microprocessor power dissipation source : arpa-esto DEC 21164 Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Evolution in Power Dissipation Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Why worry about power — Portability Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Where Does Power Go in CMOS? Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Dynamic Power Consumption Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Dynamic Power Consumption - Revisited Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Power Consumption is Data Dependent Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Transition Probabilities for Basic Gates Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Transition Probability of 2 -input NOR Gate Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Problem: Reconvergent Fanout Digital Integrated Circuits Low Power Design © Prentice Hall 1995

How about Dynamic Circuits? Digital Integrated Circuits Low Power Design © Prentice Hall 1995

4 -input NAND Gate Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Transition Probabilities for Dynamic Gates Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Glitching in Static CMOS Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Example 1: Chain of NOR Gates Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Example 2: Adder Circuit Digital Integrated Circuits Low Power Design © Prentice Hall 1995

How to Cope with Glitching? Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Short Circuit Currents Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Impact of rise/fall times on short-circuit currents Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Short-circuit energy as a function of slope ratio Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Static Power Consumption Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Leakage Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Sub-Threshold in MOS Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Power Analysis in SPICE Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Design for Worst Case Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Reducing Vdd Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Lower Vdd Increases Delay Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Lowering the Threshold Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Transistor Sizing for Power Minimization Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Transistor Sizing for Fixed Throughput Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Reducing Effective Capacitance Digital Integrated Circuits Low Power Design © Prentice Hall 1995

Summary Digital Integrated Circuits Low Power Design © Prentice Hall 1995