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The Design of the Secondary-Compensated Bandgap Reference Voltage Circuit for Wide Power Supply Voltage

LV Hang-wei

Abstract

A bandgap reference voltage circuit with wide power supply voltage was proposed in this paper.This circuit can be used in accelerometer with large measuring range and high voltage.The circuit has a simple topology without special operational amplifier.Using the base current,it realized the secondary temperature compensation for reference voltage and improved the temperature characteristics of reference voltage.The Hspice simulation results show that the circuit can work normally in the supply voltage range of 2.5V～30V,and the voltage regulation is 0.7×10-6V/V,the temperature coefficient is 4.8×10-6/℃ between the temperature range of-40℃～125℃.

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Available abstract

Key concepts: Bandgap voltage reference, Voltage reference, Power supply rejection ratio, Dropout voltage, Constant power circuit, Voltage divider, Electrical engineering, Voltage