Raster distortion corrected deflection circuit

A ferroresonant transformer power supply and deflection circuit providing raster distortion correction, comprising:

• a source of exciting voltage;
• a ferroresonant transformer having a magnetizable core and a plurality of windings including a primary winding coupled to said exciting voltage source and a first output winding having developed thereacross an alternating polarity output voltage;
• a capacitor coupled to one of said plurality of windings and resonating therewith for magnetically saturating a portion of said magnetizable core to regulate said alternating polarity output voltage;
• a horizontal deflection winding;
• a horizontal deflection generator responsive to the voltage developed at a generator input terminal for generating horizontal deflection current in said horizontal deflection winding, the magnitude of which current varies with the average value of the voltage developed at said generator input terminal;
• means for rectifying said alternating polarity output voltage to develop a first component voltage at said generator input terminal;
• a source of DC voltage;
• a controllable switch coupled to said source of DC voltage and to said generator input terminal for applying said DC voltage to said generator input terminal for only a portion of each cycle of said alternating polarity output voltage commencing at a controllable instant wthin each cycle of said alternating polarity output voltage;
• and
• means coupled to said controllable switch for altering said controllable instant in response to variations of a signal representative of a raster distortion condition to vary the average value of the voltage developed at said generator input terminal in a manner providing correction of said raster distortion condition.

A horizontal deflection circuit with side pincushion distortion correction, comprising:

• a source of alternating polarity input voltage;
• an input transformer having a primary winding excited by said alternating polarity input voltage for developing an alternating polarity output voltage across a secondary winding of said input transformer;
• an input choke;
• a half-wave rectifier coupled to said secondary winding and to said input choke for applying said alternating polarity output voltage to said input choke during a first polarity interval of said alternating polarity output voltage;
• a source of DC voltage;
• first switching means coupled to said DC voltage source and to said input choke for applying said DC voltage to said input choke during a first portion of the alternate polarity interval of said alternating polarity output voltage;
• a flywheel diode coupled to said input choke for conducting choke current during a second portion of said alternate polarity interval;
• a horizontal deflection winding;
• a horizontal deflection generator coupled to said input choke for developing a trace voltage from the voltage applied to said input choke, said deflection generator including a trace switch coupled to said horizontal deflection winding for periodically applying said trace voltage to said deflection winding to generate horizontal scanning current in said deflection winding;
• and
• control means coupled to said first switching means and responsive to a side pincushion correction signal for altering the conduction of said first switching means to provide side pincushion correction to said horizontal scanning signal.