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automatic phase control |
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automatic phase control [¦ȯd·ə¦mad·ik ′fāz kən‚trōl]
(electronics) Abbreviated APC. A circuit used in color television receivers to reinsert a 3.58-megahertz carrier signal with exactly the correct phase and frequency by synchronizing it with the transmitted color-burst signal. An automatic frequency-control circuit in which the difference between two frequency sources is fed to a phase detector that produces the required control signal. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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