This paper demonstrates a low-noise, offset and temperature coefficient (TC) bandgap reference for the portable biopotential signal monitoring system. The proposed feedback coefficient enhancement technique suppresses the low-frequency noise and offset voltage. Besides, the bowl-shaped curvature compensation is applied in the BGR to obtain a decent TC. The proposed bandgap reference was designed and fabricated by the $0.18 ~\mu \text{m}$ deep N-well CMOS technology with an active area of 0.088 mm2. Experimental results show that this BGR outputs 0.6 V reference voltage under 1.2 V supply voltage while consuming $60 ~\mu \text{W}$ power. The measured integrated noise from 0.1 to 10 Hz is about $3.0 ~\mu \text{V}$ (rms). In addition, the average TC of the BGR is 2.4 ppm /°C from −45 °C to 125 °C after trimming.

中文翻译：

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具有反馈系数增强和碗形曲率补偿的 3.0$\mu$Vrms、2.4 ppm/$^{\circ}$C BGR