DIFF Subgroup
H03L 7/08 Details of the phase-locked loop
Introduced: January 1980
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
Of 9 combined children, 6 exist in both systems.
3 codes are CPC-only extensions.
1 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1980.
Child Classifications
Navigate with arrow keys, Enter to open
- H03L 7/081 provided with an additional controlled phase shifter since 1990 +1 CPC IPC+CPC Available in IPC and CPC
- H03L 7/083 the reference signal being additionally directly applied to the generator since 1990 IPC+CPC Available in IPC and CPC
- 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) since 1990 IPC+CPC Available in IPC and CPC
- H03L 7/099 concerning mainly the controlled oscillator of the loop since 1990 +2 CPC IPC+CPC Available in IPC and CPC
- H03L 7/10 for assuring initial synchronisation or for broadening the capture range since 1980 +3 CPC IPC+CPC Available in IPC and CPC
- H03L 7/14 for assuring constant frequency when supply or correction voltages fail since 1980 +3 CPC IPC+CPC Available in IPC and CPC