A 0.45-V, 14.6-nW CMOS Subthreshold Voltage Reference With No Resistors and No BJTs
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A 0.45-V, 14.6-nW CMOS Subthreshold Voltage Reference With No Resistors and No BJTs
Abstract—A low-voltage low-power CMOS sub-threshold voltage reference with no resistors and no bipolar junction transistors in a wide temperature range. The temperature stability is improved by second-order compensation. By employing a bulk-driven technique and the< Final Year Projcts 2016 > MOS transistors working in the sub-threshold region, the supply voltage and the power dissipation are reduced. Moreover, a trimming circuit is adopted to compensate for the process-related reference voltage variation. The proposed voltage reference has been fabricated with the 0.18-µm 1.8-V CMOS process. The measurement results show that the minimum power supply voltage is 0.45 V, the power consumptionis 14.6 nW, the average temperature coefficient measured from-40◦ C to 125◦C is 63.6 ppm/C, and the line regulation is 1.2 mV/V in the power supply voltage ranging from 0.45 to 1.8 V. In addition, the chip area is 0.012 mm◦ 2.
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