A power supply to convert AC power to DC power with a relatively constant voltage and linear current delivery. The DC power may be positive or negative voltage, or both may be produced. A fluctuating voltage from an AC voltage source (e.g., a transformer) is utilized to charge and substantially discharge a storage device on a cycle by cycle basis. The voltage of the storage device continuously supplements the fluctuating voltage to result in relatively constant voltage. Unlike a typical power supply, (a) the discharge of the storage device forces power into a load, (b) total capacitance may be substantially less than (e.g., 1% or less of) the capacitance of a typical power supply, (c) a shunt capacitor is not required, and (d) the transformer may be continuously utilized throughout the entire cycle (rather than for only a brief portion of each cycle), which may reduce noise.