Abstract
A low-power complementary metal oxide semiconduct-or (CMOS) bandgap current reference is proposed under the 1.8V supply voltage. The temperature compensation current generator was used in order to obtain an accurate 5µA current with lower temperature coefficient. Sub-threshold technology and advanced startup circuit were adopted to decrease the circuit power consumption. The current reference has been simulated based on SMIC 0.18µm CMOS technology. The simulation results show that it has significantly low power and low sensitivity to the temperature. The power consumption is only 35.22µW. The temperature coefficient is 42.62ppm/℃ under typical process with the temperature range from -40℃ to 125 ℃.
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