A CMOS bandgap reference based on switched capacitor with temperature compensation method

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  • Ran Xiongfei
    Institute of Microelectronics of the Chinese Academy of Sciences University of Chinese Academy of Sciences
  • Chen Ming
    Institute of Microelectronics of the Chinese Academy of Sciences
  • Wang Weiguang
    Beijing Information Science and Technology University
  • Zhou Li
    Institute of Microelectronics of the Chinese Academy of Sciences
  • Wang Haiyong
    Institute of Microelectronics of the Chinese Academy of Sciences
  • Chen Jie
    Institute of Microelectronics of the Chinese Academy of Sciences

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Description

<p>A CMOS bandgap reference based on switched capacitor is proposed in this paper. Temperature compensation is adopted to achieve better temperature coefficient (TC). Two first order compensated reference voltages are combined to realize a new reference voltage with lower TC. Due to the switched capacitor operation, power and area of circuit are reduced. Simulation result shows that the bandgap reference achieves TC of 14.5ppm/°C from -40°C to 120°C. Bandgap reference output voltage is 235mV with a ripple voltage of 700μV.</p>

Journal

  • IEICE Electronics Express

    IEICE Electronics Express 19 (4), 20210538-20210538, 2022-02-25

    The Institute of Electronics, Information and Communication Engineers

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