求上极板采样,桥接电容为单位电容的SAR ADC内DAC结构，十分感谢！

xiwanghebe · 发表于 2016-2-26 14:11:54

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本帖最后由 xiwanghebe 于 2016-2-26 15:16 编辑

如图是带桥接电容的下极板采样SAR ADC内DAC结构，桥接电容使用单位电容Cu，现在需要上极板采样桥接电容为单位电容Cu的DAC结构，求各位帮忙，十分感谢

xiwanghebe · 发表于 2016-2-26 14:53:16

自顶，急需单位电容做桥接电容的上极板采样，发现相对下极板，这种结构很难实现

bluedaquarius · 发表于 2016-2-26 15:18:31

顶一下。。。

billlin · 发表于 2016-2-26 15:35:53

您請研讀附件,
(1) Split Capacitor DAC Mismatch Calibration in Successive Approximation ADC
(2) A 2 7mW 1MSps 10b analog-to-digital converter with built-in reference buffer and 1LSB accuracy programmable input ranges
(3) 10-b 50-MSs 820-uW SAR ADC with on-chip Digital Calibration
(4) A Study on Energty-and-Area-Efficient Charge Redistribution Successive Approximation Aaalog-to-Digital COnverters Page38
您就會到bridge Structure SAR ADC 架構need Cc and Cb Capacitor.

billlin · 发表于 2016-2-26 16:13:08

您需要study以下的論文
(1)Split Capacitor DAC Mismatch Calibration in Successive Approximation ADC
(2)A 10-b 50-MSs 820-uW SAR ADC with on-chip Digital Calibration
(3) A 2 7mW 1MSps 10b analog-to-digital converter with built-in reference buffer and 1LSB accuracy programmable input ranges
(4) A Study on Energy-and-Area-Efficient Charge Redistribution Successive Approximation Analog-to-Ditital Converters Author: Chen,Yanfei Page38
看完您就知道如何設計 Cc and Cb的電容值了