Abstract:The current paper presents an improved bandgap voltage reference (BGR) that utilizes curvature-corrected current generators which compensate for the voltage reference at lower and higher temperature range. The voltage reference is operated with a supply voltage of 2.5 V to achieve an output reference of 1.1835 V. The temperature coefficient achieved from the circuit is 1.342 ppm/ • C, resulting from temperature changes between −50 • C to 125 • C, sixfold improvement from first-order BGR. The proposed circuit is simulated using Silterra 0.13 μm CMOS technology.

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Abstract:In the current paper, an improvement of piecewise curvature-corrected CMOS bandgap reference (BGR) circuit is proposed. The circuit utilizes piecewise nonlinear curvature-corrected current (PNCCC) in a conventional BGR with a current control circuit, which compensates for the voltage reference at a higher temperature range. The current control circuit (CCC) is used to reduce the total current at low temperature when the PNCCC generator is inactive. The proposed circuit is realized in CMOS 0.13 µm and has been verified to be able to save power consumption by 18.6% compared with a circuit without the current control circuit.

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