| Citation: |
Zheng Peng, Yan Wei, Zhang Ke, Li Wenhong. An offset-insensitive switched-capacitor bandgap reference with continuous output[J]. Journal of Semiconductors, 2009, 30(8): 085006. doi: 10.1088/1674-4926/30/8/085006
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Zheng P, Yan W, Zhang K, Li W H. An offset-insensitive switched-capacitor bandgap reference with continuous output[J]. J. Semicond., 2009, 30(8): 085006. doi: 10.1088/1674-4926/30/8/085006.
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An offset-insensitive switched-capacitor bandgap reference with continuous output
DOI: 10.1088/1674-4926/30/8/085006
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Abstract
An improved switched-capacitor bandgap reference with a continuous output voltage of 1.26 V has been implemented with Chartered 0.35-µm 5-V CMOS process. The output offset voltage, induced by non-ideal characteristics of operational amplifier and bias current generator, is suppressed by the proposed sample-and-hold circuit and self-bias technique. Experimental results show that the proposed circuit operates properly under a supply voltage varying from 3 to 5 V. The measured temperature coefficient is 112 ppm/℃ and the power supply rejection ratio of output voltage without any filtering capacitor is –40 dB and –33 dB at 100 Hz and 10 MHz, respectively.-
Keywords:
- bandgap reference,
- switched-capacitor,
- offset,
- self-bias,
- continuous output
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References
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Proportional views
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