Patent ID: 6262592
Filing Date: 2001-07-17
Classification: G05F

Abstract:
A voltage adjusting circuit comprising:a reference voltage generator for generating a reference voltage;a differential amplifier for comparing the reference voltage with a divided voltage, and for compensating for a variation of the reference voltage in accordance with a temperature, wherein the differential amplifier comprises,first and second transistors each receiving the reference voltage and the divided voltage, respectively, at a control electrode,first and second load resisters connected between a power supply voltage and second electrodes of the first and second transistors, respectively,first and second temperature compensation elements connected between first electrodes of the first and second transistors, respectively, and a first node, anda current source connected between the first node that connects the first and second temperature compensation elements and a ground voltage; anda voltage divider for dividing the power supply voltage to output the divided voltage, and for generating a constant output voltage in accordance with an output from the differential amplifier, wherein the first and second temperature compensation elements of the differential amplifier have unequal and opposite resistance changes as temperature increases so that the divided voltage is constantly maintained regardless of the temperature.