A CMOS bandgap reference circuit for sub-1-V operation without using extra low-threshold-voltage device

A new sub-1-V CMOS bandgap voltage reference without using low threshold voltage device is presented in this paper. The new proposed sub-1-V bandgap reference with startup circuit has been successfully verified in a standard 0.25 /spl mu/m CMOS process. The experimental results show that, at the minimum supply voltage of 0.85 V, the output reference voltage is 238.2 mV with an effective temperature coefficient of 58.1 ppm//spl deg/C while DC current is 28 /spl mu/A. At 0.85 V supply voltage, the measured power noise rejection ratio is -33.2 dB at 10 KHz.