Vertical convergence circuit

Claim 2

A vertical convergence circuit comprising: a transformer having a vertical deflection coil connected across its secondary winding; a resistor connected in series with the primary winding of said transformer; a series combination of first and second convergence coils; first means for supplying energy to one end of said series combination through a first variable resistor from the junction between said primary winding and said resistor; second means for supplying said energy from the junction between Said primary winding and said resistor to a differentiation circuit comprising a first capacitor and a second variable resistor having a sliding contact which is connected to the other end of said series combination; third means for supplying said energy from the junction between said primary winding and said resistor to a series circuit of a second capacitor, a third variable resistor and a third capacitor, said third variable resistor having a sliding contact connected to the junction between the first and second convergence coils, the capacitance of said second capacitor being relatively small and the capacitance of said third capacitor being relatively large so that said series circuit forms a differentiation circuit when said sliding contact is positioned near one terminal of said third variable resistor which is connected to said second capacitor, and said series circuit forms an integration circuit when said sliding contact is positioned near the other terminal of said third variable resistor which is connected to said third capacitor.

Claim 3

The vertical convergence circuit as defined in claim 1 further comprising a fourth variable resistor connected across both ends of said series combination of said first and second convergence coils, said fourth variable resistor having a sliding contact which is connected to the junction between the first and second coils.

Claim 4

The vertical convergence circuit as defined in claim 1 wherein said second variable resistor further has a fixed intermediate tap connected to ground, one terminal of said second variable resistor being connected to said first capacitor and the other terminal of said second variable resistor having no connection.

Claim 5

The vertical convergence circuit as defined in claim 3 further comprising a fourth variable resistor connected across both ends of said series combination of said first and second convergence coils, said fourth variable resistor having a sliding contact which is connected to the junction between the first and second convergence coils.

Claim 6

The vertical convergence circuit as defined in claim 4 further comprising a third convergence coil, means for supplying said energy to one end of said third convergence coil through a fifth variable resistor from the junction between said primary winding and said resistor, and a sixth variable resistor having a fixed intermediate tap connected to ground and having a sliding contact connected to the other end of said third convergence coil, one terminal of said sixth variable resistor being connected to said one terminal of said second variable resistor, the other terminal of said sixth variable resistor having no connection.

Claim 7

The vertical convergence circuit as defined in claim 1 wherein said differentiation circuit comprising a first capacitor and a second variable resistor comprises a series circuit of said first capacitor, a switch and said second variable resistor.

Claim 8

The vertical convergence circuit as defined in claim 6 further comprising a fourth variable resistor connected across the both ends of said series combination of said first and second convergence coils, said fourth variable resistor having a sliding contact which is connected to the junction between the first and second convergence coils.

Claim 9

The vertical convergence circuit as defined in claim 7 further comprising a third convergence coil, means for supplying said energy to one end of said third convergence coil through a fifth variable resistor from the junction between said primary winding and said resistor, and a series circuit of another switch and sixth variable resistor, said series circuit being connected in parallel with the series combination of said switch and said second variable resistor, said sixth variable resistor having a sliding contact connected to the other end of said third convergence coil.

Claim 10

A vertical convergence circuit comprising: a transformer having a vertical deflection coil connected across its secondary winding; a resistor connected in series with the primary winding of said transformer; a series combination of first and second convergence coils; first means for supplying energy to one end of said series combination through a first variable resistor from the junction between said primary winding and said resistor; second means for supplying said energy from the junction between said primary winding and said resistor to a first series circuit of a first capacitor, a second variable resistor and a second capacitor, said second variable resistor having a sliding contact connected to the other end of said series combination, the capacitance of said first capacitor being relatively small and the capacitance of said second capacitor being relatively large so that said first series circuit forms a differentiation circuit when said sliding contact is positioned near one terminal of said second variable resistor which is connected to said first capacitor, and said first series circuit forms an integration circuit when said sliding contact is positioned near the other terminal of said second variable resistor which is connected to said second capacitor; third means for supplying said energy from said junction between said primary winding and said resistor to a second series circuit of a third capacitor, a third variable resistor and a fourth capacitor, said third variable resistor having a sliding contact connected to the junction between the first and second convergence coils, the capacitance of said third capacitor being relatively small and the capacitance of said fourth capacitor being relatively large so that said second series circuit forms a differentiation circuit when said sliding contact of said third variable resistor is positioned near one terminal of said third variable resistor which is connected to said third capacitor, and said second series circuit forms an integration circuit when said sliding contact of said third variable resistor is positioned near the other terminal of said third variable resistor which is connected to said fourth capacitor.

Claim 11

A vertical convergence circuit comprising: a transformer having a vertical deflection coil connected across its secondary winding; a resistor connected in series with the primary winding of said transformer; a series combination of first and second convergence coils; first means for supplying energy to one end of said series combination through a first variable resistor from the junction between said primary winding and said resistor; second means for supplying said energy from the junction between said primary winding and said resistor to a first series circuit of a first capacitor, a second variable resistor and a second capacitor, said second variable resistor having a sliding contact connected to the other end of said series combination, the capacitance of said first capacitor being relatively small and the capacitance of said second capacitor being relatively large so that said first series circuit forms a differentiation circuit when said sliding contact is positioned near one terminal of said second variable resistor which is connected to said first capacitor, and said first series circuit forms an integration circuit when said sliding contact is positioned near the other terminal of said second variable resistor which is connected to said second capacitor; third means for supplying said energy from said junction between said primary winding and said resistor to a second series circuit of a third capacitor, a third variable resistor and a fourth capacitor, said third variable resistor having a sliding contact connected to the junction between the first and second convergence coils, the capacitance of said third capacitor being relatively small and the capacitance of said fourth capacitor being relatively large so that said second series circuit forms a differentiation circuit when said sliding contact of said third variable resistor is positioned near one terminal of said third variable resistor which is connected to said third capacitor, and said second series circuit forms an integration circuit when said sliding contact of said third variable resistor is positioned near the other terminal of said third variable resistor which is connected to said fourth capacitor.

Claim 12

The vertical convergence circuit as defined in claim 9 further comprising a fourth variable resistor connected across both ends of said series combination of said first and second convergence coils, said fourth variable resistor having a sliding contact which is connected to the junction between the first and second convergence coils.

Claim 13

The vertical convergence circuit as defined in claim 9 further comprising a diode connected across said fourth capacitor.

Claim 14

The vertical convergence circuit as defined in claim 10 further comprising a third convergence coil, means for supplying said energy to one end of said third convergence coil through a fifth variable resistor from the junction between said primary winding and said resistor, and means for supplying said energy from the junction between said primary winding and said resistor to a third series circuit of a fifth capacitor, a sixth variable resistor and a sixth capacitor, said sixth variable resistor having a sliding contact connected to the other end of said third convergence coil, the capacitance of said fifth capacitor being relatively small and the capacitance of said sixth capacitor being relatively large so that said third series circuit forms a differentiation circuit when said sliding contact of said sixth variable resistor is positioned near one terminal of said sixth variable resistor which is connected to said fifth capacitor, and said third series circuit forms an integration circuit when said sliding contact of said sixth variable resistor is positioned near the other terminal of said sixth variable resistor which is connected to said sixth capacitor.

Claim 15

The vertical convergence circuit as defined in claim 12 further comprising a resistor connected across said sixth capacitor.