Optimized biasing technique for high-speed digital circuits with advanced CMOS nanotechnology

Abstract

This paper presents a biasing optimization technique for high-speed digital circuits design with advanced CMOS nanotechnology. Modern CMOS nanotechnology introduces several new problems in high-speed circuits design. As the fastest signal frequency components approach the peak transition frequency of the MOSFET, which depends heavily on the biasing voltage, the optimized biasing techniques become very important in high-speed circuits. Many trade-offs in the high-speed circuits need to be considered, and either power or headroom may be traded for higher speed. The optimized biasing technique is thoroughly analyzed first in this paper, and a typical high-speed CML circuit is designed based on this technique.