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本文提出了一种基于NPN晶体管的温度传感器，通过背景校准方案校正前端所有电流域误差，实现了-70°C至125°C范围内0.05°C（3σ）的高精度，解决了传统BJT温度传感器难以达到亚0.1°C精度的问题。
Abstract In this work, an NPN-based temperature sensor is presented that introduces a backgroundcalibration scheme to correct all current-domain errors in its front-end. It achieves an inaccuracy of 0.05°C (3σ) from -70°C to 125°C (RIA=0.05%) after a one-point trim, which represents the state-of-the-art energy efficiency (100fJ)K2) and power supply sensitivity (PSS) (0.004°C/V). After a 1-point trim, BJT-based temperature sensors can be very accurate, with many designs achieving better than 0.2°C inaccuracy from -55°C to 125°C [1]. However, achieving sub-0.1°C accuracy has proven extremely challenging, having been reported only once before according to a comprehensive survey [1]. This is mainly due to the difficulty in completely correcting for errors caused by the decrease in BJT current gain (β) at low temperatures and the exponential increase of leakage currents at high temperatures. This
Nandor G. Toth, Kofi A. A. Makinwa
TU Delft, Delft, The Netherlands