CPC Subgroup
H03L 7/08 Details of the phase-locked loop
Full Title
Automatic control of frequency or phase; Synchronisation > using a reference signal applied to a frequency- or phase-locked loop > Details of the phase-locked loop
9 direct subcodes
Child Classifications
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- H03L 7/081 provided with an additional controlled phase shifter
- H03L 7/083 the reference signal being additionally directly applied to the generator
- H03L 7/085 concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal (H03L7/10 takes precedence; circuits for comparing the phase or frequency of two mutually-independent oscillations H03D13/00)
- H03L 7/099 concerning mainly the controlled oscillator of the loop
- H03L 7/10 for assuring initial synchronisation or for broadening the capture range
- H03L 7/14 for assuring constant frequency when supply or correction voltages fail