Successive approximation analog-to-digital converter using capacitor array with sub-capacitors configured by capacitor disassembling and related method thereof

摘要

A successive approximation analog-to-digital converter (SAR ADC) includes a capacitor array and a comparator. The capacitor array has M capacitors which are arranged to perform capacitor switching operations sequentially, wherein a sum of capacitance values of the M capacitors is equal to (2N−1) unit capacitors, M>N, and M and N are both positive integers. The comparator is arranged for comparing an output of the capacitor array and an analog input sequentially.

主权项

1. A successive approximation analog-to-digital converter (SAR ADC), comprising:
a capacitor array, comprising M capacitors arranged to perform capacitor switching operations sequentially, wherein a sum of capacitance values of the M capacitors is equal to (2N−1) unit capacitors, M>N, and M and N are both positive integers; and a sum of capacitance values of a plurality of specific capacitors among the M capacitors is equal to 2k unit capacitors, where K is a positive integer and K