| Citation: |
Zhou Qianneng, Wang Yongsheng, Yu Mingyan, Ye Yizheng, Li Hongjuan. A High-PSRR CMOS Bandgap Reference Without Resistor[J]. Journal of Semiconductors, 2008, In Press.
Zhou Q N, Wang Y S, Yu M Y, Ye Y Z, Li H J. A High-PSRR CMOS Bandgap Reference Without Resistor[J]. J. Semicond., 2008, 29(8): 1517.
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A High-PSRR CMOS Bandgap Reference Without Resistor
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Abstract
A CMOS bandgap reference (BGR) without a resistor,with a high power supply rejection ratio and output below 1V is proposed.The circuit is suited for on-chip voltage down converters.The BGR is designed and fabricated using an HJTC 0.18μm CMOS process.The silicon area is only 0.031mm2 excluding pads and electrostatic-discharge (ESD) protection circuits.Experimental results show that the PSRR of the proposed BGR at 100Hz and 1kHz achieves,respectively,-70 and -62dB using the pre-regulator.The proposed BGR circuit generates an output voltage of 0.5582V with a variation of 1.5mV in a temperature range from 0 to 85℃.The deviation of the output voltage is within 2mV when the power supply voltage VDD changes from 2.4 to 4V.-
Keywords:
- CMOS bandgap reference,
- current source circuit,
- PSRR,
- pre-regulator
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References
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