A novel low voltage high precision CMOS current reference
Tao Yin · Journal of Xidian University · 2005
Based on the low voltage PTAT bandgap reference and bulk-driven low voltage operational amplifier, a novel low voltage high precision CMOS current reference is implemented. The supply, temperature and technology characteristics are simulated by TSMC (0.25μm) CMOS Spice models. When the supply voltage rages from (1.0～)(1.8V), the output current is equal to (12.437～)(12.497μA) at room temperature. When the temperature ranges from (0～)47℃, the output current is also equal to (12.447μA). The maximal absolute current error of technology is equal to (0.54μA), and the relative error to the normal output current is 4.34%.