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DC block
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| Component type | Passive |
|---|---|
| Working principle | Direct Current |
| Electronic symbol | |
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DC blocks are coaxial components that prevent the flow of audio and direct current (DC) frequencies while offering minimum interference to RF signals. There are three basic forms of DC blocks. "Inner only" models have a capacitor in series with the center conductor, "outer only" models have a capacitor in series with the outer conductor, and "inner/outer" models have capacitors in series with both the inner and outer conductors.[1] The insulation material on the outer models is non-conductive. Applications include ground loop elimination, signal source modulation leakage suppression, system signal-to-noise ratio improvement, test setup isolation and other situations where undesired DC or audio current flows in the system.
It is an alternative to the AC block.
See also
References
- ↑ Amateur Radio on the Move. American Radio Relay League. 2005. p. 2.4. ISBN 9780872599451.
External links
- What Is a DC Block? // wiseGEEK
- DC Blocks & Bias Tees
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