Chapter 7 Tutorial
Output Characteristics
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Figure 7-6. Simplified Diagram of Common Mode and Normal Mode Sources of Noise
When the load changes very rapidly, as when a relay contact is closed, the
inductance in the hook up wire and in the power supply output will cause a
spike to appea r at the load. The spi ke is a f uncti on of th e rate of chan ge of t he
load current. When very rapid chang es in load are expe cted, a capacito r with
a low series resistance, in parallel with the power supply, and close to the load
is the best way to minimize these voltage spikes.