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JSSC 2009第7期Power Management

A Temperature-to-Digital Converter Based on an Optimized Electrothermal Filter

本文介绍了一种基于优化电热滤波器的CMOS温度数字转换器设计。
未修剪不准确度小于0.7°C(-55°C至125°C)
电热滤波器相位域ΣΔ调制器同步解调温度传感器CMOS
优化电热滤波器布局以减少热相散
采用宽带增益增强跨导器减少电相散
使用斩波解调器实现相位求和节点以减少残余偏移
Abstract
and Kofi A. A. Makinwa , Senior Member, IEEE Abstract—This paper describes the design of a CMOS tem- perature-to-digital converter (TDC). It operates by measuring the temperature-dependent phase shift of an electrothermal filter (ETF). Compared to previous work, this TDC employs an ETF whose layout has been optimized to minimize the thermal phase spread caused by lithographic inaccuracy. To minimize electrical phase spread, the TDC’s front-end consists of a wide bandwidth gain-boosted transconduc