Raster distortion corrected deflection circuit

A television deflection apparatus, comprising:

• a source of a first input signal at a frequency that is related to a first deflection frequency;
• a retrace resonant circuit, including a deflection winding and a first retrace capacitance;
• first switching means responsive to said first input signal and coupled to said retrace resonant circuit for generating a deflection current in said deflection winding and a first retrace pulse voltage in said first retrace capacitance during a retrace interval of a given deflection cycle;
• a second retrace capacitance coupled to said retrace resonant circuit for generating in said second retrace capacitance a second retrace pulse voltage during said retrace interval;
• a source of an input supply voltage;
• a load circuit;
• a supply inductance coupled to said source of input supply voltage and to said first switching means for coupling said first and second retrace pulse voltages therethrough to said load circuit and for replenishing energy losses in said retrace resonant circuit during said retrace interval;
• a source of a modulation second input signal;
• and
• second switching means responsive to said first and second input signals and coupled to said second retrace capacitance for varying, in accordance with said second input signal, a time difference between initiation of said second retrace pulse voltage and initiation of said first retrace pulse voltage to produce a modulation of said deflection current such that when said second retrace pulse voltage is generated, an impedance arrangement, is interposed between said supply inductance and said retrace resonant circuit said impedance arrangement including said second retrace capacitance and exhibiting a high impedance at frequencies that are substantially lower than a retrace resonance frequency of said retrace resonant circuit for isolating said supply inductance from said retrace resonant circuit at said lower frequencies.