Horizontal deflection S-typed correction circuit
AssigneeSamsung Electronics Co., Ltd.
InventorsJoong-Yeol Kwon, Hideki Kofune
Life of this patent
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Abstract
A horizontal deflection S-type correction circuit a transformer connected in series to a S-typed correction capacitor that is serially coupled to a horizontal coil of a deflecting yoke and a resistor for detecting deflection current. The resistor is coupled in series with the secondary winding of a first part of the transformer. A differential amplifier is coupled to the primary winding of a second part of the transformer and a double balanced modulator is connected between the resistor and the differential amplifier.
Claims25
A horizontal deflection S-type correction circuit to perform consecutive corrections by changing a voltage generated at both terminals of a capacitor connected in series to horizontal coil of a deflecting yoke, based on a change in deflection frequency in order to correct distortion of an image to be displayed in a monitor, said circuit comprising:
- a transformer connected in series to a S-type correction capacitor serially coupled with said horizontal coil;
- a resistor for detecting deflecting current, said resistor being coupled with a coil of a first part of said transformer;
- a differential amplifier coupled with a coil of a second part of said transformer;
- and
- modulator connected between said resistor and said differential amplifier.
A horizontal deflection circuit, comprising:
- a transformer having a primary winding and a secondary winding;
- a capacitor having a first electrode connectable at a first junction to one lead of a deflection coil, and a second electrode connected to a first lead of said secondary winding;
- a resistor coupled in series between a second and different lead of said secondary winding and a reference potential;
- a differential amplifier having an inverting input port connected to said first electrode, and an output port connected to a first lead of said primary winding;
- and
- a balanced modulator having two input ports coupled to a second junction between said resistor and said second lead of said secondary winding, and an output port coupled to a non-inverting input port of said differential amplifier.
A horizontal deflection circuit, comprising:
- a deflection yoke comprising a deflection coil;
- a transformer having a primary winding and a secondary winding;
- a first capacitor having a first electrode coupled at a first junction to one lead of a deflection coil, and a second electrode connected to a first lead of said secondary winding;
- a first resistor coupled in series with said secondary winding and said first capacitor, between a second and different lead of said secondary winding and a reference potential;
- a second capacitor having a first electrode coupled to said first junction;
- a second resistor coupled in series with said second capacitor between a second electrode of said second capacitor and a second junction;
- a third resistor coupled in series with said second resistor between said second junction and said reference potential;
- a fourth resistor coupled between said first junction and a third junction;
- a fifth resistor coupled in series with said fourth resistor between said third junction and said reference potential;
- a modulator having one input port operationally coupled to said third junction, two input ports coupled to a fourth junction between said first resistor and said second lead, and an output port providing a signal exhibiting a second potential varying in dependence upon potentials occurring at said third junction and said fourth junction;
- and
- a differential amplifier providing at an output port coupled to a first lead of said primary winding, a correction potential varying in dependence upon differences between said third potential and a fourth potential occuring at said third junction.
A horizontal deflection S-type correction circuit, comprising:
- a deflection yoke having a horizontal coil;
- a transformer comprising a primary winding and a secondary winding;
- a correction capacitor coupled in series between said horizontal coil and a first lead of said secondary winding;
- a ground resistance coupled between a second lead of said secondary winding and a reference potential;
- a differential amplifier having an output port coupled to a first lead of said primary winding;
- and
- a modulator connected between a single input port of said differential amplifier and a first junction formed between said resistance and said second lead of said secondary winding.
Dependencies are inferred from the claim text.