1.5V CMOS current reference with extended temperature operating range
نویسنده
چکیده
Traditional bandgap based current references have restricted temperature operating range due to the limited input common mode range of the feedback amplifier. This paper introduces a modified bandgap current reference that overcomes this limitation by placing a natural device (V, -0V) level shift stage between the amplifier and the bandgap. The circuit has been fabricated in a 0.25-pm CMOS process. It generates a reference current of 5pA with a temperature variation of 7% over an extended temperature range of 40°C to 150°C. The bandgap occupies approximately 170x80p2 and draws 56pA from a 1.5V supply.
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تاریخ انتشار 2002