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Power Studies

Study Results

The results of the two different power measurement tools are presented here. Along with callibration results, we discover the power costs of TMR. It is also interesting to note how sensitive power measurments are to design placement. Different placements of each incrementer and counter design are used to emphasize this sensitivity.

In the results that follow, both the JPower and XPower tools were used to measure the power of a design at frequencies ranging from 10 MHz to 70 MHz. The results of these measurements are plotted in the graphs that follow. In each graph will usually be two pairs of results. The lower red and blue line are the results for the design without the use of TMR and the top red and blue lines are the results with TMR. All blue lines correspond to JPower results, while all red lines correspond to XPower results.

Also included in the following results are tables which summarize important information for each design. One of the pieces of information summarized is the slope of each line in the graphs. This slope reports the increase in mA per 1 MHz for a given design. Another important result is the TMR vs. non-TMR power ratio for a given design.

XOR'ed Incrementer Results
Placement was not studied as carefully with the XOR'ed incrementer designs. A Xilinx auto-placement and an optimized hand placement are studied with this design. The following graphs and table show the results for this design:

Power Measurment Graphs

Table Summary Results
   Auto-Place Place 1
JPower Slopes 7.85 31.13 6.06 22.18
XPower Slopes 7.95 27.06 7.79 25.10
JPower TMR vs. Non-TMR Ratio 3.96 3.66
XPower TMR vs. Non-TMR Ratio 3.40 3.22
Size (LUTs) 3250 9750 3250 9750

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