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In this regard, there are two very common types of power supply, the linear and the switched mode. The main difference between the two is the way they operate.Linear power supplies provide a constant voltage at all times while the power provided by a switched mode power supply constantly varies. linear power supply is often used because of its simplicity. Linear regulators exist in packaged ICs that only need a rectified voltage source to operate. In comparison, a switched mode power supply is very complex and requires a handful of ICs as well as inductors.
An essential part of an AC-DC power supply circuit is the ï¬lter, used to separate the residual AC (called the ârippleâ voltage) from the DC voltage prior to output. Here are two simple AC-DC power supply circuits, one without a ï¬lter and one with: Filter Plug Vunfiltered Vfiltered Plug Draw the respective output voltage waveforms of these two power supply circuits (V unfiltered versus V filtered).