Patent ID: 6246280
Filing Date: 2001-06-12
Classification: G11C,H02M

Abstract:
A voltage generating circuit generating a negative output voltage in accordance with a negative reference voltage, comprising:a voltage converting circuit driven by a first voltage higher than said output voltage and a negative second voltage lower than said output voltage for generating said output voltage following said negative reference voltage; anda sub-voltage generating circuit supplying said second voltage and including first to m-th sub-voltage generators each driven by a corresponding first driving voltage equal to or lower than a ground voltage and equal to or higher than said second voltage and by a corresponding second driving voltage for generating a corresponding internal negative voltage,said first sub-voltage generator receiving the ground voltage as said corresponding first driving voltage and a positive third voltage as said corresponding second driving voltage for generating and controlling a first internal negative voltage so as to maintain a difference between said first internal negative voltage and said third voltage within a prescribed value,said i-th sub-voltage generator (2.ltoreq.i.ltoreq.m) receiving an (i-1)th internal negative voltage generated by said (i-1)th sub-voltage generator as said corresponding first driving voltage and a positive (i+2)th voltage as said corresponding second driving voltage for generating and controlling an I-th internal negative voltage so as to maintain a difference between said i-th internal negative voltage and said (i+2)th voltage within said prescribed value, and said m-th sub-voltage generator generating said second voltage as said m-th internal negative voltage.