IEEE Access (Jan 2020)

A High-Precision Bandgap Reference With a V-Curve Correction Circuit

  • Chang-Chi Lee,
  • Hou-Ming Chen,
  • Chi-Chang Lu,
  • Bo-Yi Lee,
  • Hsien-Chi Huang,
  • He-Sheng Fu,
  • Yong-Xin Lin

DOI
https://doi.org/10.1109/ACCESS.2020.2984800
Journal volume & issue
Vol. 8
pp. 62632 – 62638

Abstract

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In this study, a precision bandgap reference with a v-curve correction (VCC) circuit is presented. The proposed VCC circuit generates a correction voltage to reduce the temperature drift of the reference voltage and achieves a low temperature coefficient (TC) in a wide temperature range. The proposed bandgap reference was designed and fabricated using a standard TSMC 0.18-$\mu \text{m}$ 1P6M CMOS technology with an active area of 0.0139 mm2. The measured results show that the proposed bandgap reference achieves a TC of 1.9-5.28 ppm/°C over a temperature range of -40°C to 140 °C at a supply voltage of 1.8 V. In addition, the circuit demonstrated a line regulation of 0.033 %/V for supply voltages of 1.2 - 1.8 V at room temperature.

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