A four-quadrant dc-dc converter offers an elegant way to control currents and voltages, and is able to set current to any level.

A better approach is to use the LT1618 constant-current, constant-voltage converter, which combines a traditional voltage-feedback loop and a unique current-feedback loop to operate as a ...

MDACs generate a current proportional to an input digital code (Figure 1). The postamplifier converts the DAC’s current-output signal to a voltage level. A simple current-to-voltage conversion seems ...

If they need to be brought to a lower voltage, they have to be partially discharged. Thus, in such an application, a power supply must be able to source or sink current as required.

In his video [Afroman] describes how the LM317 can be used to regulate current rather than voltage to provide a constant current source under varying load.

A current source provides electrical energy with a constant current. The implication is that if the resistance of the load changes the current source will vary the voltage to compensate.