Keysight Technologies E3646A - Output Characteristics; Figure 6-3 Ideal Constant Voltage Power Supply; Figure 6-4 Ideal Constant Current Power Supply

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Output Characteristics
158 E364xA User’s and Service Guide
Output Characteristics
An ideal constant voltage power supply would have a zero
output impedance at all frequencies. Thus, as shown in
Figure 6- 3, the voltage would remain perfectly constant in
spite of any changes in output current demanded by the
load.
Figure 6-3 Ideal constant voltage power supply
Figure 6-4 Ideal constant current power supply