The circuit’s broadband PSRR was simulated, measured in ohms, and defined as the ratio of the AC voltage of the V1 supply to the AC current through RL1. From DC to almost 1 kHz, the result was a ...

In contrast to alternating current, or AC, which, depending on the supply's frequency, switches direction 50 or 60 times per second, the current in DC circuits flows only in one direction.