一款用于生物植入设备的采用0.18微米CMOS工艺的8.9有效位数、2.5功耗、150千采样率的非二进制冗余逐次逼近型模数转换器。
A 8.9-ENOB 2.5-εW 150-KS/s non-binary redundant successive approximation ADC in 0.18-microm CMOS for bio-implanted devices.
作者信息
Chan Kok Lim, Lee Andreas Astuti, Yuan Xiaojun, Krishna Kotlanka R, Je Minkyu
机构信息
Integrated Circuits and Systems Laboratory, Institute of Microelectronics, A*STAR (Agency of Science, Technology and Research), Singapore.
出版信息
Annu Int Conf IEEE Eng Med Biol Soc. 2010;2010:650-3. doi: 10.1109/IEMBS.2010.5627231.
A successive approximation analog-to-digital converter (SAR ADC) with a split-capacitor switching scheme implementing the generalized non-binary redundant SAR algorithm and an energy efficient level shifter is proposed for bio-implanted applications. The generalized non-binary redundant SAR algorithm removes the radix constraint in conventional non-binary redundant SAR algorithm, and the energy efficient level shifter allows optimal power supplies to be chosen independently for the analog and digital blocks. A FOM of 34.7fJ/step has been achieved.
本文提出了一种用于生物植入应用的逐次逼近型模数转换器（SAR ADC），该转换器采用了实现广义非二进制冗余SAR算法的分裂电容切换方案以及节能型电平转换器。广义非二进制冗余SAR算法消除了传统非二进制冗余SAR算法中的基数约束，而节能型电平转换器允许为模拟和数字模块独立选择最佳电源。该转换器实现了每步34.7fJ的优值（FOM）。
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