Synchronous switched vertical deflection driven during both trace and retrace intervals

A method for producing vertical deflection current through a vertical deflection winding of a television apparatus, comprising the recurrent steps of:

• extracting energy from the horizontal deflection circuit during one of the horizontal trace and retrace intervals;
• applying said energy so extracted to said vertical deflection winding for promoting deflection current therein in a first polarity;
• extracting energy from said horizontal deflection circuit during the other of said horizontal trace and retrace intervals;
• applying said energy extracted during the other of said intervals to said vertical deflection winding poled to promote said deflection current in a second polarity opposite to said first;
• and
• changing the energy so extracted during each successive recurrent cycle to vary said deflection currents of said first and second polarities so as to form the desired vertical deflection current.

A switched vertical deflection arrangement, comprising:

• a source of voltage alternating at the horizontal rate between mutually opposite first and second polarities;
• a vertical deflection winding;
• first controllable switch means coupling said source with said winding during the horizontal retrace interval for allowing the flow of current of a first polarity through said winding;
• second controllable switch means coupling said source with said winding during the horizontal trace interval for allowing the flow of current through said winding of a second polarity opposite said first;
• and
• control means coupled with said first and second switches for controlling the conduction thereof for controlling the amount of current of said first and second polarities flowing in said winding for control of the net current therethrough to establish the vertical deflection current.

A power amplifier arranged to be energized from a horizontal deflection circuit comprising:

• a horizontal deflection circuit for deflecting an electron beam of a kinescope during alternate horizontal trace and retrace intervals in response to a recurrent deflection signal;
• a load;
• first and second controllable switch means coupled to said deflection circuit and to said load for controllably applying portions of the energy of said deflection signal to said load during each of said trace and retrace intervals;
• a source of signals which are to be amplified;
• and
• control means coupled to said source and to said controllable switch means for controlling said switch means in such a manner as to apply said portions of the energy of said deflection signal to said load for producing across said load a replica of said signals which are to be amplified.

A deflection system for a cathode-ray tube, said deflection system comprising:

• a horizontal deflection system coupled to a horizontal deflection winding for producing a horizontal deflection signal thereacross;
• a source of voltage independent of said horizontal deflection system, said source producing alternating voltage of first and second mutually opposite polarities during first and second intervals, respectively, said first and second intervals recurring cyclically;
• a vertical deflection winding;
• switched vertical deflection means coupled with said source and with said vertical deflection winding for applying progressively smaller portions of the energy produced by said source during said recurrent first intervals to said vertical deflection winding and progressively larger portions of the energy produced by said source during said recurrent second intervals for generating each sawtooth vertical deflection current in said vertical deflection winding.