A current-mirror technique used for high-order curvature compensated bandgap reference in automotive application
Dongwoo Ha, Yujin Park, Suhwan Kim · 2016
A high-order temperature compensated current-mode bandgap reference is proposed for automotive applications. The proposed circuit uses one BGR core to produce concave upward and concave downward curvatures which are combined to be compensated and have highly precise current. It also uses two different types of resistors to compensate temperature coefficients in resistors. The circuit is designed specifically for automotive application which operates in a wide temperature range, from -40 C to 150 C. With 3.3-V supply voltage, the simulated output bandgap reference voltage provides a voltage of 861 mV and has a temperature coefficient of 75 ppm/°C. The silicon area is 0.0249 mm2with a 0.18-μm BCDMOS automotive technology.