Reference voltage generator with fast start-up and low stand-by

Details Reference voltage generator with fast start-up and low stand-by Reference voltage generator with fast start-up and low stand-by

1996-06-24

1997-12-30

Nguyen, Matthew V.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

327538, G05F 316

Patent

active

057034753

ABSTRACT:
A reference voltage generator includes a pull-up stage which pulls a reference voltage signal rapidly up toward 1/2Vcc at power-up. The pull-up stage is controlled by a controller which has a comparator and control voltage generator which are disabled after the pull-up operation is terminated so as to reduce stand-by current consumption. The controller includes a pair of NAND gates cross connected as an RS flip-flop to turn on the pull-up stage at power up. A boost signal allows the flip-flop to enable the comparator and control voltage generator after the power supply has stabilized. When the reference voltage signal reaches 1/2Vcc, the comparator sets the flip flop which turns off the pull-up stage and disables the comparator and control voltage generator.

REFERENCES:
patent: 4342926 (1982-08-01), Whatley
patent: 5109187 (1992-04-01), Guliani
patent: 5404096 (1995-04-01), Thiel
patent: 5453679 (1995-09-01), Rapp
Y. Nakagome et al., "A 1.5V Circuit Technology for 64 Mb DRAMS," 1990 Symposium on VLSI Circuits, pp. 17-18.

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