IPC Subgroup
H03L 7/14 for assuring constant frequency when supply or correction voltages fail
Introduced: January 1980
Last revised: January 2006
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 > for assuring constant frequency when supply or correction voltages fail
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRONIC CIRCUITRY
- Subclass:
- AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES