Method for improving sfdr and sndr of capacitor-resistor combined sar adc by capacitor re-configuration

University of Electronic Science and Technology of China (2018) Method for improving sfdr and sndr of capacitor-resistor combined sar adc by capacitor re-configuration. .

Abstract

A method for improving a spurious free dynamic range and a signal-to-noise-and-distortion ratio of a capacitor-resistor combined successive approximation register analog-to-digital converter by capacitor re-configuration, the method including: 1) arranging 128 unit capacitors in a positive array and a negative array, respectively, dividing unit capacitors of symmetrical positions of the positive array and the negative array into groups to yield a total of 128 groups of capacitors; 2) acquiring 128 digital codes corresponding to 128 groups of capacitors; 3) sorting the 128 groups of capacitors from maximum to minimum according to the 128 digital codes obtained in 2), and recording the 128 groups of capacitors after sorting as C1-C128; and 4) selecting 64 groups of capacitors from C33 to C96, and reconfiguring the 64 groups of capacitors in capacitor arrays of the capacitor-resistor analog-to-digital converter.

• Item Type: Patents
• Additional Information: Publication Number: US20180198457A1.
• Status: Published
• Glasgow Author(s) Enlighten ID: Heidari, Professor Hadi
• Authors: Fan, H., Heidari, H., Maloberti, F., Li, D., Hu, D., and Cen, Y.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• First Published: 12 July 2018