30139596
FIGURE 39. Topology #2: 3-wire RTD Using 1 Current Source
Figure 39 shows the second topology for a 3-wire RTD appli-
cation. Topology #2 shows the same connection as topology
#1, but without IB2. Although this topology eliminates a cur-
rent source, it requires two channel measurements as shown
in Equation 4.
Equation 4 — VIN Equation for Topology #2
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