A Self-Calibrated NPN-Based Temperature Sensor With ±0.05 °C (3σ) Inaccuracy From −70 °C to 125 °C and 100fJ ${\\cdot}$ K2 Resolution FoM https://sscs.ieee.org/wp-content/themes/movedo/images/empty/thumbnail.jpg 150 150 https://secure.gravatar.com/avatar/8fcdccb598784519a6037b6f80b02dee03caa773fc8d223c13bfce179d70f915?s=96&d=mm&r=g
Abstract:
This article presents a CMOS temperature sensor that achieves both state-of-the-art energy efficiency and accuracy. An NPN-based front-end generates both PTAT and CTAT currents, whose ratio is then digitized by a continuous-time (CT) $\Delta \Sigma $ modulator, which realizes a noise-optimized current-balancing scheme that maximizes the sensor’s resolution. To correct …