Decoupling capacitor
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In electronics, a decoupling capacitor is a capacitor used to decouple one part of a circuit from another. Noise caused by other circuit elements is shunted through the capacitor, reducing its effect
Capacitor packages: SMD ceramic at top left; SMD tantalum at bottom left; through-hole tantalum at top right; through-hole electrolytic at bottom right. Major scale divisions are cm.
Impedance curves of aluminum electrolytic capacitors (solid lines) and polymer capacitors (dashed lines)
1980s Commodore 64 main board. Most of the "orange" round disc parts are decoupling capacitors.
1980s Cromemco XXU, a Motorola 68020 processor S-100 bus card. The axial parts between the ICs are decoupling capacitors.
Ceramic capacitor
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A ceramic capacitor is a fixed-value capacitor where the ceramic material acts as the dielectric. It is constructed of two or more alternating layers of ceramic and a metal layer acting as the electro
Decoupling capacitor
…These photos show old printed circuit boards with through-hole capacitors, where as modern boards typically have tiny surface-mount capacitors. Ceramic capacitor Equivalent series inductance…
A typical ceramic through-hole capacitor
A selection of ceramic capacitors: fixed leaded disc capacitors on the left and right; multilayer ceramic chip capacitors (MLCC) in the middle
Ceramic tube capacitor, the typical style of ceramic capacitors in the 1950s and 1970s
MLCCs as decoupling capacitors around a microprocessor