High-Order Curvature-Compensated CMOS Bandgap Reference of Current Mode
Suying Yao · Journal of Tianjin University Science and Technology · 2008
A high-order curvature-compensated CMOS bandgap reference of current mode,applicable to low supply volt-age,is proposed to obtain stable and accurate reference voltage.The circuit realizes high-order curvature compensation by adding a new branch to the traditional bandgap reference.It was fabricated in Chartered 0.35,μm CMOS process.By simula-tion and verification with spectre,the circuit achieves an output voltage of 800 mV,a temperature coefficient of 3×10-6 ℃-1 in the temperature range of-40 ℃ to 85 ℃,a PSRR of-60 dB at 10 kHz and functions performed properly with a minimum supply voltage of 1.7 V.The proposed circuit outperforms the traditional one largely.