A New Sub-1 Volt Reference for Low Voltage Application Based on MOSFET’s Threshold Voltage Extractor

Abstract

A CMOS voltage reference circuit featuring MOS transistors threshold voltage extractor has been developed. The circuit implemented using 0.35µm CMOS AMS process generates a reference of 574 mV for a power supply of 3.3V with 726µW power consumption. The circuit presents a variation of 43 ppm/ºC for the –10 to –110ºC temperature, and 18.6 dB PSRR at 1 KHz. A vital analytical approach is presented to provide a universal design guideline.

 Keywords: threshold voltage extractor, low-voltage, process variation, CMOS, bandgap, voltage reference