A voltage reference based on subthreshold is presented in this paper. The MOSFET working in linear region
instead of the traditional resistance
is used to eliminate the mobility and current temperature impact. In this way
the range of temp is broadened and performance is improved. The circuit is simulated with 0. 5m CMOS model and the result shows that the circuit can work ranging from 2. 5 to 8V and its line regulation is 0. 3mV/V. Under 3.3V operating voltage
the output reference tempcoefficient in -55℃ to 150℃ is 7. 3ppm/℃
and its static power is 13.8W
power supply rejection ration is -53dB at 1kHz. The design of reference meets the requirements of a wide temperature range