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Method and apparatus for low power analog-to-digital conversion

United States Patent

October 1, 2013
View the Complete Patent at the US Patent & Trademark Office
Brookhaven National Laboratory - Visit the Office of Technology Commercialization and Partnerships Website
A method and apparatus for analog-to-digital conversion. An Analog-to-Digital Converter (ADC) includes M ADC.sub.j, j=1, 2, . . . , M. Each ADC.sub.j 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 ADC.sub.j changes state in response to a current associate with an input signal of the ADC.sub.j exceeding a threshold, thus switching on the next cell. Each ADC.sub.j is enabled to perform analog-to-digital conversion on a residual current of a previous ADC.sub.j-1 after the previous ADC.sub.j-1 has completed its analog-to-digital conversion and has been disabled.
De Geronimo; Gianluigi (Syosset, NY), Nambiar; Neena (Ridge, NY)
Brookhaven Science Associates, LLC (Upton, NY)
13/ 474,060
May 17, 2012
STATEMENT OF GOVERNMENT LICENSE RIGHTS The present invention was made with government support under contract number DE-AC02-98CH10886, awarded by the U.S. Department of Energy. The Government has certain rights in this invention.