⚡ 本页包含 AI 生成的分析内容，仅供参考
本文提出了一种用于轨到轨精密电压传感的14位模数接口，实现了6.7nV/√Hz的噪声性能和亚毫赫兹的1/f拐角。通过结合斩波/自稳零和抗混叠滤波技术，解决了传感器接口在极低频下的低噪声和高精度需求。
Robert Bosch, Palo Alto, CA Many sensors demand energy-efficient precision voltage sensing interfaces with low noise performance down to very low frequencies. Examples include micro Kelvin resolution temperature sensors for wafer stepper temperature stabilization [1] and others [2]. In many such applications, analog-to-digital conversion is inevitable, which mandates sampling. So far, sensor interfaces have demonstrated low offset drift using chopping/auto-zeroing while preserving the intrinsic SNR of the transducer by anti-aliasing filtering before sampling. Integration with a boxcar window, or boxcar sampling, is a particularly convenient way to realize anti-aliasing filtering in the sampling process [3]. However, implementations of the technique, due to their use of just a voltage-to-current converter whose output current is integrated over a time window, e.g. in a sigma-delta modulator [2], remain susceptible to gain drift resulting from either transconductance or time window drift
Chinwuba D. Ezekwe, Johan P. Vanderhaegen, Xinyu Xing, Ganesh K. Balachandran