A precision digital rheostat that synthesizes an accurate programmed resistance equal to reference resistor R1 linearly multiplied by U1's R_BW/R_AB

Authors	Stephen Woodward
Main Document	Article «A precision digital rheostat»
Description	Figure 1
File Format / Size	PDF / 21 Kb
Document Language	English

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Article «A precision digital rheostat»

Figure 1. A precision digital rheostat that synthesizes an accurate programmed resistance equal to reference resistor R1 linearly multiplied by U1's R_BW/R_AB
Figure 2. Linear relationship between R and R_BW showing the circuit synthesizes an accurate programmed resistance equal to reference resistor R1 linearly multiplied by U1's R_BW/R_AB
Figure 3. Graphs for G_A2 (red) and R/R1 (black) versus R_BW/R_AB on the x-axis. When the programmed value for R goes down, G_A2 must go up
Figure 4. Duplicate and cross-connect Figure 1's circuitry to get a two-terminal programmable resistance

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