Filter circuits
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This document discusses different types of filter circuits used to reduce ripple voltage and increase average DC voltage output. It describes L-section filters which use an inductor to provide constant current to the load and reduce ripple voltage which is then filtered by a capacitor. Pi filters are also described where the capacitors provide a short circuit for AC and an open circuit for DC, while the inductor blocks AC and provides a short circuit for DC. The document also mentions using a bleed resistor to safely discharge capacitor charge over time when the load is removed.
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Filter circuits
- 1. Filter Circuits Reduce ripple voltage therefore increase average DC Voltage
- 2. Filtering with a Capacitor
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- 4. Pi Filter AC sees the capacitors as a short circuit and the inductor as a block DC sees the capacitors as an open circuit and the inductor as a short circuit The AC of the will flow through C1 and be blocked by the inductor the DC will not pass through the capacitor but will pass through the inductor. Any AC not passed through C1 will then be “cleaned up” by C2
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