Analog-to-digital converter methods and structures for...

Details Analog-to-digital converter methods and structures for... Analog-to-digital converter methods and structures for...

2005-01-04

2005-01-04

Williams, Howard L. (Department: 2819)

Coded data generation or conversion

Converter compensation

C341S172000

Reexamination Certificate

active

06839009

ABSTRACT:
Methods and structures are provided for the interleaved calibration and subsequent correction of errors in switched-capacitor converter stages of pipelined analog-to-digital converters. The interleaved calibration can be run continuously or at selected times without disturbing the ongoing processing of input data signals. With first and second sets of capacitors, converter stages interleavably process input data signals and input calibration signals. Once these stages have been calibrated with their second sets of capacitors, the first and second sets are exchanged and the converter stages subsequently process input data signals with their second sets of capacitors.

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Moon, U.K., et al., “Background Digital Calibration Techniques for Pipelined ADC's”, IEEE Transactions on Circuits and Systems-II, 44(2), pp. 102-109, Feb., 1997.
Lee, H. S., “A 12-b 600 ks/s Digitally Self-Calibrated Pipelined Algorithmic ADC”, IEEE J. Solid-State Circuits, 29, pp. 509-515, Apr., 1994.

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