A CMOS Subbandgap Reference Circuit With 1-V Power Supply Voltage

J. Doyle, Y.J. Lee, Y.-B. Kim, H. Wilsch, F. Lombardi
2004 IEEE Journal of Solid-State Circuits  
A CMOS subbandgap reference circuit with 1-V supply voltage is described. To obtain subbandgap reference voltages with a 1-V supply voltage, threshold voltage reduction and subthreshold operation techniques are used. Large 1 BE (100 mV) as well as a 90-dB operational amplifier are used to circumvent the amplifier offset. A power-on-reset (POR) circuit is used as startup. This circuit has been implemented using a standard 0.5-m CMOS process, and its size is 940 m 1160 m. The temperature
more » ... emperature coefficient is 17 ppm from 40 C to 125 C after resistor trimming and the minimum power supply voltage is 0.95 V. The measured total current consumption is below 10 A and the measured output voltage is 0.631 V at room temperature. Index Terms-CMOS, current source, power-on-reset (POR) circuit, subbandgap reference voltage circuit, subthreshold operation, stability, temperature sensitivity.
doi:10.1109/jssc.2003.820882 fatcat:nkdx22anyfgrtfc6zz2aht32pu