Figure 44. Ground Connections for Multiple Loads, Two or More Grounded
e.Load System Floated as a DC Potential Above Ground In some applications it is necessary to operate the power supply output at a fixed voltage above (or below) ground potential. In these cases it is usually advantageous to designate DC Common Point using whichever of the preceding four alternatives is ap- propriate, just as though conductive grounding would be employed. Then this DC Common Point should be "shorted" to the DC Ground Point through a 1∝ F capacitor (Figure 45).
Figure 45. Floating Load
In some special applications, however, (e. g., bridge load circuits) neither conductive nor capacitive grounding of the dc load distribution system is appropriate, since such grounding would also short out the desired output signal being generated by the bridge.
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