Title :
Energy efficient bootstrapped CMOS large RC-load driver circuit for ultra low-voltage VLSI
Author :
Lu, Chien-Yu ; Chuang, Ching-Te
Author_Institution :
Dept. of Electron. Eng. & Inst. of Electron., Nat. Chiao-Tung Univ., Hsinchu, Taiwan
Abstract :
This paper presents an energy efficient bootstrapped CMOS driver to enhance switching speed for driving large RC load for ultra low-voltage CMOS VLSI. The proposed bootstrapped driver eliminates the leakage paths in the conventional bootstrapped driver to achieve more positive and negative boosted voltage levels and to allow the boosted nodes to maintain the boosted levels, thus improving boosting efficiency and enhancing the switching speed. Performance evaluation based on UMC 65nm low power technology (Vtn≈Vtp≈0.5v) indicates that the proposed driver provides rising-delay improvement of 24%-56% and falling-delay improvement of 9%-30% at Vdd = 0.3 V for 1 to 10 segments of large distributed RC loading, as compared with the conventional bootstrapped driver consuming the same power. Although designed and optimized for ultra low-voltage operation, the proposed bootstrapped driver is shown to be advantageous at high supply voltage as well.
Keywords :
CMOS integrated circuits; RC circuits; bootstrap circuits; driver circuits; low-power electronics; UMC low power technology; bootstrapped CMOS large RC load driver circuit; bootstrapped driver; size 65 nm; switching speed; ultra low voltage VLSI; voltage 0.3 V; Boosting; CMOS technology; Design optimization; Driver circuits; Energy consumption; Energy efficiency; Power engineering and energy; Switching circuits; Threshold voltage; Very large scale integration;
Conference_Titel :
VLSI Design Automation and Test (VLSI-DAT), 2010 International Symposium on
Conference_Location :
Hsin Chu
Print_ISBN :
978-1-4244-5269-9
Electronic_ISBN :
978-1-4244-5271-2
DOI :
10.1109/VDAT.2010.5496694