Abstract
In this paper, a bandgap voltage reference working with high precision in a wide temperature range is proposed. The proposed bandgap voltage reference adopts self-biased structure without using resistor and operational amplifier. It adopts 6 stages of the proportional to absolute temperature circuit to increase temperature range. And it uses linearity compensation circuit to improve the temperature coefficient. Supported by GSMC 0.13 μm technology, with 1.2V supply voltage, the proposed bandgap voltage reference can generate a steady 66 mV reference voltage. Within the temperature range of -100 to 145 °C, the temperature coefficient is 8.5486 ppm/°C and the line sensitivity is 0.19245 mV/V. And the bandgap voltage reference covers a core area of 0.00396 mm2.
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