Analog to digital converters
AssigneePlessey Overseas Limited
InventorThomas Jackson
Life of this patent
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Abstract
A high resolution analog to digital converter comprising a low resolution analog to digital converter and an interpolating digital to analog converter, the interpolating digital to analog converter having a second order digital controller and a one bit quantiser arranged in a feedback loop. The low resolution analog to digital converter is coupled to a multi-stage decimation filter having an algorithm of any stage thereof determined in dependence upon the algorithm of the immediately preceding stage.
Claims4
A high resolution analogue to digital converter comprising combiner means for receiving an analogue input signal, an analogue controller means for receiving an output from the combiner means, a low resolution analogue to digital converter for receiving an output from the analogue controller means, and an interpolating digital to analogue converter arranged in a feedback loop to the combiner means, the interpolating digital to analogue converter comprising a further combiner means for receiving a digital input, digital controller means for receiving an output from the further combiner means, digital slicer means for receiving an output from the digital controller means and feedback means for affording the output of the digital slicer means to the further combiner means, a multi-stage decimation filter coupled to the output of the low resolution analogue to digital converter, the multistage decimation filter having the algorithm of any stage thereof determined in dependence upon the algorithm of the immediately preceding stage.
Dependencies are inferred from the claim text.