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| High Performance CMOS Bandgap Reference Source Based on Negative Feedback Clamp Technique |
| Cao Han-mei①; Yang Yin-tang①; Cai Wei②; Lu Tie-jun②; Wang Zong-min② |
| ①Microelectronics Institute, Xidian University, Key Lab of Ministry of Education for Wide Band-Gap Semiconductor Materials and Devices, Xi’an 710071,China;②Beijing Microelectronics Insistute of Technology, Beijing 100076, China |
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Abstract A novel CMOS bandgap reference is presented.A negative feedback clamp technique is used which eliminates the offset of Op-Amps and simplifies the design.A regulated cascode configuration is used to improve Power Supply Rejection Ratio(PSRR).It is implemented in SMIC standard 0.18μm CMOS process,the results from HSPICE simulation show that the temperature coefficient between-15～70℃ is 10.8ppm/℃,and the PSRR at 10Hz is 74.7dB,the output noise voltage is 148.7μV/sqrt(Hz).
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Received: 05 June 2007
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2008, Vol. 30 
