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

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 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/degrees C over a temperature range of degrees C to 140 degrees 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.