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Various calibration algorithms for self-calibration A/D converters

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1 Author(s)
Wagdy, Mahmoud Fawzy ; Dept. of Electr. Eng., California State Univ., Long Beach, CA, USA

Error cancellation of capacitor arrays in self-calibrating, successive approximation A/D converters is discussed. The two known methods are based on iterative sequential computation of the correction voltages used during A/D conversion. The original method employs one calibration capacitor, whereas the modified method requires N calibration capacitors for the N-bit converter. An algorithm is presented for determining the correction voltages, based on two source voltages generated by precision D/A converters. This allows direct measurement with no need for long sequential computations

Published in:
Circuits and Systems, IEEE Transactions on  (Volume:37 ,  Issue: 7 )

Date of Publication: Jul 1990

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