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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 1µF 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.