“automatic phase control”的概念、定义、翻译、参考文献-科学参考

单词	automatic phase control
释义	automatic phase control [¦ȯd·ǝ¦mad·ik `fāz kǝn´trōl] ^ELECTRONICS 1. Abbreviated APC. 2. 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. 3. 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.
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