New approach to CMOS current reference with very low temperature coefficient

A novel CMOS current reference circuit with very low temperature coefficient is realized, by compensating the temperature performance of the resistor. This circuit gives out a current reference realizing a temperature coefficient of 50 ppm°C over the temperature range of (0°C, 110°C) and a supply voltage coefficient of 210 ppm/V. This circuit consumes 85 mA at room temperature and can work properly with a supply voltage of 1-V.

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