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Method and apparatus for clockless analog-to-digital conversion and peak detection

United States Patent

7,187,316
March 6, 2007
View the Complete Patent at the US Patent & Trademark Office
Brookhaven National Laboratory - Visit the Office of Technology Commercialization and Partnerships Website
An apparatus and method for analog-to-digital conversion and peak detection includes at least one stage, which includes a first switch, second switch, current source or capacitor, and discriminator. The discriminator changes state in response to a current or charge associated with the input signal exceeding a threshold, thereby indicating whether the current or charge associated with the input signal is greater than the threshold. The input signal includes a peak or a charge, and the converter includes a peak or charge detect mode in which a state of the switch is retained in response to a decrease in the current or charge associated with the input signal. The state of the switch represents at least a portion of a value of the peak or of the charge.
DeGeronimo; Gianluigi (Syosset, NY)
Brookhaven Science Associates, LLC (Upton, NY)
11/ 346,831
February 6, 2006
This invention was made with support from the U.S. Government under Contract No. DE-AC0298CH10886 by the U.S. Department of Energy. The U.S. Government has certain rights in the invention.