A Superior-Order Curvature Corrected Bandgap Reference With Less Sensitivity Of Mismatch
IEICE ELECTRONICS EXPRESS(2012)
摘要
A superior-order curvature corrected bandgap reference (BGR) is proposed. The BGR features itself by adding only an extra NMOS transistor to a first-order BGR. The extra transistor generates a piecewise nonlinear corrected current to reduce its temperature coefficient (TC) and forms a negative feedback to decrease the variation of offset and TC caused by mismatch. Measurement result shows the proposed BGR achieves most optimal TC of 2.8 ppm/degrees C in the temperature range of -40 similar to 125 degrees C. The variation of offset and TC among different samples are reduced by the negative feedback effectively.
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关键词
piecewise nonlinear curvature corrected, temperature coefficient, offset
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