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Design and Research of High Performance Bandgap Reference IC

Author: XuZhuoHui
Tutor: HuangJunKai
School: Jinan University
Course: Communication and Information System
Keywords: Bandgap reference voltage source Temperature Coefficient Power Supply Rejection Ratio Chopper modulator
CLC: TN432
Type: Master's thesis
Year: 2010
Downloads: 311
Quote: 3
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Abstract


The bandgap reference voltage source is an important unit in the analog integrated circuits , widely used in the mold / digital converter , the digital / analog converter , dynamic memory , flash memory, etc. integrated circuit , however, the temperature of the bandgap reference voltage source is stable and anti-noise performance affect the accuracy and performance of the entire circuit system . Therefore , the traditional bandgap reference voltage source structure can no longer meet the requirements of IC development . For bandgap reference voltage source temperature stability and anti-noise performance , this paper studied the structure and characteristics of the bandgap reference voltage source , on the basis of the analysis bandgap voltage reference circuit principle and the main influencing factors , proposed a the chopper eliminate the imbalance the technology improved Kujik structure , the design and verification of the bandgap reference voltage source with a good temperature coefficient and low offset . The main content of the full text of the study include : 1, using the chopper modulator eliminate op amp input offset voltage and low-frequency noise , improve the performance of the operational amplifier , bandgap reference voltage source of anti-noise performance . Bias technical design has nothing to do with the power to quickly start with the bias circuit to improve the circuit power supply rejection ratio (PSRR) and supply voltage regulation , to improve the accuracy of the bandgap reference voltage source . 3 concentric matching fork fingering layout and process design technology , current mirror op amp input differential high-precision matching tube and pnp tube , eliminating circuit disorders , to improve the accuracy of the bandgap reference voltage source . Finally , the actual circuit design , simulation and verification . With HSIPICE Software The results show that : the design bandgap reference voltage source , the operating temperature range of -40 ℃ ~ 85 ℃ , the temperature coefficient 6ppm / ℃; When the supply voltage 2.7V ~ 5.5V , the output voltage of 1.26 ± 0.002V; in a typical case , the power supply rejection ratio of 70dB , a start-up time of 70us . Therefore , to achieve the goal of the design of high-performance bandgap reference voltage source , reached embedded LED display constant current to drive the technical requirements of the ASIC chip , and more competitive in the market for the future of the bandgap reference voltage source further developed and laid a firm foundation.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Microelectronics, integrated circuit (IC) > Semiconductor integrated circuits ( solid state circuits ) > Field-effect type
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