Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Patent
1994-04-04
1995-04-25
Logan, Sharon D.
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
341131, 341164, H03M 302, H03M 120, H03M 150
Patent
active
054103100
ABSTRACT:
A sigma-delta technique is used to generate a digital representation of the incoming analog signal amplitude. The integration stage of the converter holds an analog error term relative to the ratio of an incoming analog input signal to a reference voltage. The incoming analog signal is disconnected at the end of the conversion. The error term is monitored through a comparator as charge packets are applied to the input of the integration stage. The number of charge packets needed to have the error term cross zero provides information which can be used to extend the resolution of the analog to digital converter.
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Cheung, Peter Y. K. and See, Eric S. K., "A Comparison of Decimation Filter Architectures for Sigma-Delta A/D Converters." 1991 IEEE International Symposium on Circuits and Systems, vol. 3 of 5, (Jun. 1991); pp. 1637-1640.
Elsag International N.V.
Katterle Paul R.
Logan Sharon D.
Rickin Michael M.
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