Earticle

초록

영어

A study of a fractal structure of a clock generator and distributor is performed with possible use in today’s ultra-high-speed, GHz range or higher, integrated circuit design and other future digital system applications. A fractal cell is composed of a simple ring oscillator with three inverting amplifiers, configuring a triangle shape, with an inverting amplifier placed at each side. Each side is then shared with an adjacent cell, which makes this fractal structure that is, theoretically, spreadable infinitely in 2D domain. This fractal structure is proved to have insensitivities to supply voltage and temperature variations: less than 1% of clocks skew of a clock period, with given 3% of supply voltage or 5% of temperature fluctuations. This is because any local disturbances or gradients will instantly and evenly be distributed to the whole networks yielding a global averaged state change. SPICE simulations are done with 0.5μm, 3V, N-Well CMOS process technology in order to prove the validity of the idea. A simple fractal CMOS layout, with 108 inverters, is also performed and included for future chip measurement.

목차

Abstract
 1. Introduction
 2. Structure of Fractal Cellular Oscillator Networks
 3. CMOS Oscillator Network with an Inverter for Each Branch
 4. Clock Skew Simulation Results of Fractal Cellular Oscillator Network
 5. Simulation Results with Power Supply Voltage/Temperature Gradients
  5.1. Clock Skew Simulation with Supply Voltage Gradient
  5.2. Clock Skew Simulation with Temperature Gradient
 6. CMOS Layout
 7. Conclusions
 Acknowledgements
 References

키워드

저자

• Won-yong Choi [ VLSI Lab, Department of Electronic Engineering, Hallym University, ]
• Sung-jin Kim [ VLSI Lab, Department of Electronic Engineering, Hallym University ]
• Kang-in Heo [ VLSI Lab, Department of Electronic Engineering, Hallym University ]
• Gyu Moon [ VLSI Lab, Department of Electronic Engineering, Hallym University ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Control and Automation

• 간기

  월간

• pISSN

  2005-4297

• 수록기간

  2008~2016

• 십진분류

  KDC 505 DDC 605