Bandgap Reference Voltage Generator
Date Issued
2004
Date
2004
Author(s)
Cheng, Chin-Hung
DOI
zh-TW
Abstract
Precision voltage reference plays an important role in modern integrated circuits systems. It can produce a stable reference voltage insensitive to the variations of supply voltage and temperature. Voltage references are widely adopted in many integrated circuits, such as A/D or D/A converters, operational amplifiers, and linear regulators. They are used for defining input/output voltage range, biasing current source of differential pairs, and providing a comparison reference for comparators, etc.
The objective of this thesis is to design a bandgap reference voltage generator with input voltage 3V to 6V and output voltage around 1.25V. This reference voltage is intended for using in low dropout linear regulators (LDO). A pre-regulator circuit feeds the bandgap circuit with a regulated 2V to lower the supply voltage sensitivity. A new bandgap circuit topology is also presented. The final bandgap reference with supply voltage sensitivity less than 0.3 mV/V, and temperature coefficient around 7 ppm/℃, and power consumption lower than 100μW is achieved.
Subjects
參考電壓
能隙參考電壓
Voltage Reference
Bandgap Reference
Type
thesis
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