Automatic control of frequency or phase; Synchronisation

Child Classifications

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• H03L 7/02 using a frequency discriminator comprising a passive frequency-determining element
• H03L 7/06 using a reference signal applied to a frequency- or phase-locked loop
• H03L 7/24 using a reference signal directly applied to the generator
• H03L 7/26 using energy levels of molecules, atoms, or subatomic particles as a frequency reference