A low voltage low 1/f noise CMOS bandgap reference

For a low voltage bandgap reference design, there is a tradeoff between the supply voltage and the performance of the bandgap reference in terms of untrimmed accuracy and 1/f noise performance. In this paper, the application of chopper stabilizing technique is proposed to address this tradeoff. Over five times of improvement in untrimmed accuracy and 1/f noise performance were demonstrated through a low voltage bandgap reference fabricated in a 0.8 /spl mu/m CMOS process.