Choke (electronics) | Wikipedia audio article
Channel: wikipedia tts
Date: 13/01/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Choke_(electronics)


00:01:18 1 Types and construction
00:01:51 1.1 Audio frequency chokes
00:03:44 1.2 Radio frequency chokes
00:04:39 1.3 Common-mode (CM) chokes
00:06:05 1.3.1 Near magnetic field emission reduction
00:07:27 1.3.1.1 Measurement for near magnetic field emission



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SUMMARY
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In electronics, a choke coil is an inductor used to block higher-frequency while passing lower-frequency of direct current (DC) or alternating current (AC) in an electrical circuit, A choke usually consists of a coil of insulated wire often wound on a magnetic core, although some consist of a doughnut-shaped "bead" of ferrite material strung on a wire. The choke's impedance increases with frequency. Its low electrical resistance passes both AC and DC with little power loss, but its reactance limits the amount of AC passed.
The name comes from blocking—"choking"—high frequencies while passing low frequencies. It is a functional name; the name "choke" is used if an inductor is used for blocking or decoupling higher frequencies, but is simply called an "inductor" if used in electronic filters or tuned circuits. Inductors designed for use as chokes are usually distinguished by not having the low-loss construction (high Q factor) required in inductors used in tuned circuits and filtering applications.