Used to smooth out voltage fluctuations on sources
- a.k.a. bypass cap (since it bypasses the effect of a switched load on supply rail)
- a.k.a. Decoupling cap (since it decouples AC)
Used to block DC
- a.k.a. Coupling Caps (since it couples AC)
Used to filter AC signals

Types of Capacitors

Based on polarization

Non-polarized
- Normal double playe symbol
Polarized
- Double plate with anode marked
- Flat plate with anode marked and curved plate
- Flat plate and curved plate
- NOTE: Curved plate means negative

Based on form
1. Ceramic Disc Capacitors (non-polarized)
2. MLCCs (Multi Layered Ceramic Capacitors) (non-polarized)
3. Electrolytic Capacitors (polarized)
4. Plastic Film Capacitors (non-polarized)

Ceramic Disc and MLCCs are used for power supply decoupling.
Electrolytic capacitors are used in parallel and in bulk to filter power supplies.
Other capacitors are used for their properties like self-healing

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rf circuit

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