A golden power supply that will satisfy every design requirement does not exist. Size, cost, and efficiency are the driving factors for selecting a design, causing each design to be different. This ...

If you mean ‘not a switching power supply’ here is my take. A switcher takes rectified ac and pluse width modulates it into voltage regulated DC. This thing just changes DC to ac.

While the switching power-supply circuit is more complex and may create electromagnetic ... This is a basic block diagram for a switch-mode power supply. (U.S. Navy document archive, ...