Power Supply.docx

**Power Supply** -- provides necessary DC voltage form the AC source **Unfiltered Power Supply** - contains significant AC ripple components, pulsating DC output **Output Voltage of Unfiltered Power Supply** -- Pulsating DC voltage, more ripple **Filtered Power Supply** -- more stable DC output...

**Power Supply** -- provides necessary DC voltage form the AC source **Unfiltered Power Supply** - contains significant AC ripple components, pulsating DC output **Output Voltage of Unfiltered Power Supply** -- Pulsating DC voltage, more ripple **Filtered Power Supply** -- more stable DC output **Output Voltage of Filtered Power Supply** -- Constant DC voltage, less ripple **Transformer** -- used to **increase** (step-up) or **decrease** (step-down) AC voltage **Rectifier** -- converts alternating current (AC) to direct current (DC) **Filter** **Circuit** -- blocks AC component and allows DC component to reach the load **Voltage** **Regulator** -- automatically maintain a constant voltage, reduces ripple voltages **Capacitor Filter** -- most common filter **V peak to peak** - maximum voltage change occurring during one cycle of alternating voltage or current **Ultimate** **Goal** **of a Filtered Power Supply** -- convert DC voltage to more smooth and stable DC voltage with minimal ripple **Capacitor** - Component Usually in a Filter Circuit **Vdc** **= 2Vm / π** - formula of Average voltage in Full wave rectifier **Ripple** - small AC component that remains superimposed on the DC output. **Low-pass** **Filter** - It allows low-frequency signals to pass through