H ELECTRICITY
H03 ELECTRONIC CIRCUITRY
H03L AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
H03L7/00 Automatic control of frequency or phase; Synchronisation
H03L7/06 using a reference signal applied to a frequency- or phase-locked loop
H03L7/08 Details of the phase-locked loop
H03L7/081 provided with an additional controlled phase shifter
H03L7/0812 and where no voltage or current controlled oscillator is used