Keysight E3632A - Output Characteristics; Figure 6-3 Ideal Constant Voltage Power Supply; Figure 6-4 Ideal Constant Current Power Supply

6 Tutorial 
Output Characteristics
152 E3632A User’s 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