Title :
A precise on-chip voltage generator for a giga-scale DRAM with a negative word-line scheme
Author :
Tanaka, Hiroya ; Aoki, Masaki ; Kimura, Shunji ; Sakashita, N. ; Hidaka, Hideto ; Tachibana, Takeshi ; Kimura, K.
Author_Institution :
Hitachi ULSI Eng. Corp., Tokyo, Japan
Abstract :
We have designed a precise on-chip voltage generator for giga-scale DRAMs with a negative word-line scheme. It combines a charge-pump regulator and a series-pass regulator, and includes a positive/negative offset voltage generator that uses a band-gap generator with a differential amplifier. The noise on a low-voltage word-line is suppressed to below 30 mV for the word-line transient and VBB bouncing. A DC voltage error of less than 6% without trimming is also achieved.
Keywords :
DRAM chips; ULSI; VLSI; reference circuits; voltage regulators; VBB bouncing; band-gap generator; charge-pump regulator; differential amplifier; giga-scale DRAM; negative word-line scheme; positive/negative offset voltage generator; precision on-chip voltage generator; series-pass regulator; word-line transient; Charge pumps; Differential amplifiers; Fluctuations; Mirrors; Photonic band gap; Random access memory; Regulators; Subthreshold current; Threshold voltage; Ultra large scale integration;
Conference_Titel :
VLSI Circuits, 1998. Digest of Technical Papers. 1998 Symposium on
Conference_Location :
Honolulu, HI, USA
Print_ISBN :
0-7803-4766-8
DOI :
10.1109/VLSIC.1998.688013
