METHOD AND APPARATUS FOR LOW POWER ANALOG-TO-DIGITAL CONVERSION

摘要

A method and apparatus for analog-to-digital conversion. An Analog-to-Digital Converter (ADC) includes M ADCj, j = 1, 2,...., M. Each ADCj comprises a number of cells each of which comprises a first switch, a second switch, a current sink and an inverter. An inverter of a cell in an ADCj changes state in response to a current associate with an input signal of the ADCj exceeding a threshold, thus switching on the next cell. Each ADCj is enabled to perform analog-to-digital conversion on a residual current of a previous ADCj-1 after the previous ADCj-1 has completed its analog-to-digital conversion and has been disabled.