Crosstalk (electronics)
From Wikipedia, the free encyclopedia
- For other uses, see Crosstalk (disambiguation).
In electronics, the term crosstalk (XT) has the following meanings:
- Undesired capacitive, inductive, or conductive coupling from one circuit, part of a circuit, or channel, to another.
- Any phenomenon by which a signal transmitted on one circuit or channel of a transmission system creates an undesired effect in another circuit or channel.
In telecommunication or telephony, crosstalk is often distinguishable as pieces of speech or signaling tones leaking from other people's connections. If the connection is analog, twisted pair cabling can often be used to reduce the effects of crosstalk. Alternatively, the signals can be converted to digital form, which is much less susceptible to crosstalk.
In integrated circuit design, crosstalk normally refers to a signal affecting another nearby signal. Usually the coupling is capacitive, and to the nearest neighbor, but other forms of coupling and effects on signal further away are sometimes important, especially in analog designs. See signal integrity for tools used to measure and prevent this problem, and substrate coupling for a discussion of crosstalk conveyed through the IC substrate. There are a wide variety of possible fixes, with increased spacing, wire re-ordering, and shielding being the most common.
[edit] References
- From Federal Standard 1037C and from MIL-STD-188.
