Method and apparatus for extending the resolution of a...

Details Method and apparatus for extending the resolution of a... Method and apparatus for extending the resolution of a...

H - Electricity

03

M

H03M 1/12 (2006.01) H03M 3/02 (2006.01)

Patent

CA 2138362

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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