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. 2016 Feb 19;16(2):253. doi: 10.3390/s16020253

Figure 1.

Figure 1

(a) One-wire VF-NSDE circuit (Circuit A); (b) simplified measurement circuit of a one-wire VF-NSDE circuit (Circuit B); (c) two-wire VF-NSDE circuit (Circuit C); and (d) simplified measurement circuit of a two-wire VF-NSDE circuit (Circuit D).