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<http://webisa.webdatacommons.org/439097524>	<http://www.w3.org/ns/prov#value>	"N+1 stages are shown, where each stage, except one, consists of a simple RC network and a multiplying DAC. Then, Summer 234 combines the outputs of the N+1 multiplying DACs 254 to provide an error correction signal ##EQU5##" .
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