A Current Comparison Based Voltage Supervisory Circuit with On-Chip Detection Voltage Trimming

A low power current comparison based voltage detector with on-chip detection voltage trimming is proposed in this paper. The proposed trimming technique achieves both detection voltage trimming and detection voltage accuracy trimming. The performance of the proposed circuit is validated by simulation using a 0.5 $\mu$m CMOS process. A short power-on rising time ($t_{rise}$) of less than 1 ms can be achieved due to the utilization of current comparison technique. Trimming accuracy on the detection voltage at $\pm$1.875% is obtained. The proposed circuit consumes 140 $\mu$W at supply voltage of 5 V. The overall active silicon area of the proposed circuit is 27900 $\mu$${\text{m}}^2$, which is comparable with that of other reported circuits without trimming functions. The proposed circuit is suitable for the application in a variety of power management application where energy efficiency is a consideration.