High precision bandgap reference with 2nd order curvature compensation
Qiang Ye · Journal of Xidian University · 2010
A bandgap reference circuit with an adjustable output voltage is presented.The circuit is concise and simple to implement and its power dissipation is low.The temperature characteristic is improved significantly by employing 2nd order curvature compensation.Also the additional miller capacitors optimize the loop stability.Hspice simulation has been done by the 0.6 μm CMOS process for validation.The results show that the achieved temperature coefficient of 0.8 V reference is 6.1×10-6/℃ over-40～120℃ and that the PSRR is-82 dB at a low frequency.The quiescent current is less than 6.5 μA.