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

• Published in: IEEE access 2020, Vol.8, p.62632-62638
• Main Authors: Lee, Chang-Chi, Chen, Hou-Ming, Lu, Chi-Chang, Lee, Bo-Yi, Huang, Hsien-Chi, Fu, He-Sheng, Lin, Yong-Xin
• Format: Article
• Language: English
• Subjects: Bandgap reference; Circuits; CMOS; Electric potential; Energy gap; line regulation; Low temperature; Photonic band gap; Room temperature; Simulation; Temperature; temperature coefficient (TC); Temperature distribution; temperature drift; Temperature measurement; Transistors; v-curve correction (VCC) circuit; Voltage; Voltage control; Voltage measurement
• ISSN: 2169-3536; 2169-3536
• DOI: 10.1109/ACCESS.2020.2984800

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 mm 2 . 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.