A Simple Subthreshold CMOS Voltage Reference Circuit With Channel- Length Modulation Compensation

摘要

This brief presents a simple reference circuit with channel-length modulation compensation to generate a reference voltage of 221 mV using subthreshold of MOSFETs at supply voltage of 0.85 V with power consumption of 3.3$mu$W at room temperature using TSMC 0.18-$mu$m technology. The proposed circuit occupied in less than 0.0238 mm$^2$achieves the reference voltage variation of 2 mV/V for supply voltage from 0.9 to 2.5V and about 6 mV of temperature variation in the range from$-hbox20^circ$C to 120$^circ$C. The agreement of simulation and measurement data is demonstrated.