IBM Journal of Research and Development
IBM Skip to main content
  Home     Products & services     Support & downloads     My account  

  Select a country  
Journals Home  
  Systems Journal  
Journal of Research
and Development
    Current Issue  
    Recent Issues  
    Papers in Progress  
    Recent publications  
    Author's Guide  
  Contact Us  
  Related links:  
     IBM Research  

IBM Journal of Research and Development  
Volume 25, Number 2/3, Page 135 (1981)
VLSI Circuit Design
  Full article: arrowPDF   arrowCopyright info


Delay Regulation—A Circuit Solution to the Power/Performance Tradeof

by E. Berndlmaier, J. A. Dorler, J. M. Mosley, S. D. Weitzel
This paper introduces the concept of delay regulation as a means of controlling circuit delay variations from chip to chip, which is especially important in VLSI products. An embodiment of this concept which applies a phase-locked loop to individually control chip performance and power is presented together with computer-simulated results of an example design. It is shown that accurate delay equations and the potential for improved product yield result from application of the concept. The circuit overhead for large circuits is shown to be negligible. Application to a wide range of logic circuit types is also described.
Related Subjects: Integrated circuit design; LSI