Design of a Precision Current Reference with Curvature-Compensated
Liang Zhang · Microelectronics & Computer · 2014
Integrated circuit have a greater demands for power and precision of current reference.A high-order compensated was used for current reference which based on current summing mode through a simple structure in this paper,then a piecewise curvature-compensated for the current reference.The circuit features high precision、low power consumption、high power supply rejection ratio(PSRR).Spectre simulation with TSMC_0.5μm BCD process shows the change of current is 0.032μA and the temperature coefficient is 25×10-6℃in the range-45~150℃, and at 6Vsupply voltage,PSRR is 142dB,the quiescent current is 115.4μA,the power dissipation is 0.69mW.