Patent ID: 6281665
Filing Date: 2001-08-28
Classification: G11C

Abstract:
A voltage generating circuit comprising:an output node for outputting at least two types of output potentials;a voltage divider circuit which is connected to said output node, divides the output potential at said output node, and outputs the divided voltage;a first differential amplifier to which a reference voltage and said divided voltage outputted from said voltage divider circuit are supplied and which outputs a first output signal according to the potential difference between said divided voltage and said reference voltage;a second differential amplifier to which said reference voltage and said divided voltage outputted from said voltage divider circuit are supplied and which outputs a second output signal according to the potential difference between said divided voltage and said reference voltage;a charging circuit which is connected between a first power source and said output node and which charges said output node according to the output signal of said first differential amplifier; anda discharging circuit which is connected between a second power source and said output node and which discharges said output node according to the output signal of said second differential amplifier, whereinsaid voltage divider circuit includesa first resistance circuit one end of which is connected to said output node and whose resistance value is varied according to a first control signal, anda second resistance circuit which is connected to the other end of said first resistance circuit and which changes the value of the current flowing through said first resistance circuit according to a second control signal.