Broadband bipolar power supplies are available for ripple testing by responding to higher frequencies.
Bipolar dc power supply.
To answer this question i have to start with a basic definition of polarity conventions.
Bipolar dc power supply with built in sequential signal source.
What is a bipolar four quadrant power supply.
Bipolar dc power supply.
A standard power supply typically is a source of power.
High speed bipolar amplifier.
Figure 1 shows a simple diagram of a power supply a two terminal device with the standard polarity for voltage and current.
They are fully equipped with safety functions including sinking current.
While a common unipolar dc source might be able to create a 100 ms pulse width and a high performance unipolar dc source might be able to create a 1 ms pulse width a bipolar power supply often.
High voltage power amplifier.
Aside from that the bipolar power supplies which can add ac to dc are suitable for evaluation tests and aging.