Speed-Up Techniques for Complementary Metal Oxide Semiconductor Very Large Scale Integration.
Abstract
Methods of increasing the operating speed of integrated circuits were investigated and a reference to speed-up techniques was generated. Precharging, a specific method, was applied to existing and newly designed CMOS/SOS circuit elements and evaluated. The SPICE computer program was used for transient signal timing analysis. Precharging was applied to a test circuit, the first bitslice of a previously designed ALU circuit and three newly designed chip circuit elements, to determine its effect on the operating speed of each circuit. Precharge configurations of each circuit were then simulated with SPICE. The results of this thesis research indicate that precharging can be applied to both existing and newly designed circuits, that it significantly reduces low-to-high signal transition delays, if applied correctly, and, in general, it has a detremental effect on high-to-low signal transitions, and increases the associated delays. In addition, the effectiveness of precharging is dependent on the amount of current applied to the precharged nodes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 14, 1984
- Accession Number
- ADA152466
Entities
People
- B. T. Kelley
Organizations
- Air Force Institute of Technology