Synchronization of a horizontal deflection circuit with horizontal
synchronizing signal pulses is obtained by the use of a voltage controlled oscillator
(VCO) that is included in a phase-lock loop circuit (PLL). A phase-control loop
circuit (PCL) includes a phase detector having a first input terminal that is responsive
to an output signal of the VCO and a second input terminal that is responsive to
retrace pulses of a horizontal deflection circuit output stage. A sum signal of
the phase detector output signal of the PLL and a vertical rate parabola signal
is formed upstream of the loop filter of the PLL. Correction of a differential
pin distortion is accomplished by dynamically phase shifting the phase of an output
signal of the VCO in a vertical rate parabola manner.
