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Asynchronous circuits for ultra-low supply voltages

Asynchronous circuits for ultra-low supply voltages

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Modern digital systems based on complementary metal-oxide-semiconductor (CMOS) integrated circuits (IC) are increasingly sensitive to power consumption and heat generation which has direct impact on the system's performance and reliability. Power consumption of a system can be effectively reduced by techniques such as supply voltage scaling, downsizing transistors, or limiting switching activity. Supply voltage scaling is amidst one of the most effective way to reduce power dissipation. The continuance reduction of supply voltage will require transistors to operate in subthreshold region. Process technology developed with transistors optimized for subthreshold operation offers the essential building blocks to construct digital systems that are capable of operating at ultra-low supply voltage and consuming significantly less power.

Chapter Contents:

  • 4.1 Introduction
  • 4.1.1 Subthreshold operation and FDSOI process technology
  • 4.1.2 NULL conventional logic and multithreshold NULL conventional logic
  • 4.2 Asynchronous and synchronous design
  • 4.2.1 Synchronous and asynchronous (NCL) ring oscillator
  • 4.2.2 Synchronous FIR filter
  • 4.2.3 Asynchronous (MTNCL) FIR filter
  • 4.2.4 MTNCL homogeneous parallel asynchronous platform
  • 4.3 Physical testing methodologies
  • 4.4 Physical testing results
  • 4.4.1 Synchronous designs
  • 4.4.2 Asynchronous designs
  • 4.5 Conclusion
  • References

Inspec keywords: CMOS digital integrated circuits; asynchronous circuits; integrated circuit reliability

Other keywords: ultra-low supply voltages; subthreshold region; downsizing transistors; complementary metal-oxide-semiconductor IC; CMOS integrated circuits; heat generation; process technology; power consumption; power dissipation reduction; supply voltage scaling; asynchronous circuits; modern digital system; limiting switching activity

Subjects: CMOS integrated circuits; Logic circuits; Reliability; Logic and switching circuits

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