Vertical deflection system

Claim 2

A vertical deflection system comprising a single-ended pushpull circuit having a load including a deflecting coil connected to its output terminal, a circuit including an inductance disposed between a power supply or ground and the base of one of the two transistors constituting said single-ended push-pull circuit, said inductance having a high impedance with respect to a fly-back pulse, and a feedback circuit for applying the flyback pulse appearing across said load to a connection point between said inductance and said base, whereby the other transistor is urged off with the initiation of the fly-back period and the impedance of said one transistor is minimized to accelerate discharge of energy stored in said coil for shortening said period.

Claim 3

A vertical deflection system as claimed in claim 1, in which said circuit including said inductance is a series circuit consisting of said inductance and a resistor, and the voltage appearing across said load is applied through a capacitor to the junction point between said inductance and said resistor.

Claim 4

A vertical deflection system as claimed in claim 1, in which the two transistors constituting said single-ended push-pull circuit are a set of transistors complementary to each other and have their bases connected to a common junction point, and the voltage appearing across said load is applied to said junction point through said feedback circuit and said circuit including said inductance.

Claim 5

A vertical deflection system as claimed in claim 2, in which one of the two transistors constituting said single-ended push-pull circuit is triggered by the output signal delivered from the other transistor after the class ''''A'''' amplification thereby, and the voltage appearing across said load is fed back solely to the base of the former transistor through said feedback circuit and said circuit including said inductance.

Claim 6

A vertical deflection system as claimed in claim 1, in which a transformer having a primary and secondary winding wound in the same polarity is provided so that the primary winding of said transformer serves as said inductance, and the secondary winding of said transformer is connected to the collector circuit of one of the two transistors.

Claim 7

A vertical deflection system as claimed in claim 5, in which said primary winding is connected in series with a resistor, and the voltage appearing across said load is applied through a capacitor to the junction point between said primary winding and said resistor.

Claim 8

A vertical deflection system comprising a source of a control signal, a single-ended push-pull circuit having two transistors with the base of one of said transistors connected to said source, a deflection coil circuit connected to one output terminal of said push-pull circuit, reactance means for producing resonance, connected between a power supply and the collector of said one transistor, inductance means connected between the base of said one transistor and said power supply or ground, and feedback means for applying a fly-back pulse of the deflection coil to said base, said inductance means presenting a high impedance to the fly-back pulse whereby the other transistor is urged off with the initiation of the fly-back period and the impedance of said one transistor is minimized to accelerate discharge of energy stored in said coil for shortening said period.

Claim 9

A vertical deflection system comprising a source of a control signal, a single-ended push-pull circuit having two transistors with the base of one of said transistors connected to said source, a deflection coil circuit connected to one output terminal of said push-pull circuit, reactance means for producing resonance, connected between a power supply and the collector of said one transistor, inductance means connected between the base of said one transistor and said power supply or ground, and feedback means for applying a fly-back pulse of the deflection coil to said base, said inductance means presenting a high impedance to the fly-back pulse whereby the other transistor is urged off with the initiation of the fly-back period and the impedance of said one transistor is minimized to accelerate discharge of energy stored in said coil for shortening said period.