Vertical deflection circuit

A vertical deflection circuit comprising:

• a first negative feedback amplifier having a first inverting input terminal, a first non-inverting input terminal, and a first output terminal, said first non-inverting input terminal being supplied with a saw-tooth wave, said first output terminal being connected to one terminal of a deflection coil, said deflection coil having another terminal negatively fed back to said first inverting input terminal;
• a second negative feedback amplifier having a second inverting input terminal, a second non-inverting input terminal, and a second output terminal connected to said another terminal of said deflection coil through a resistor, said second output terminal being connected to said second inverting input terminal, and said second output terminal outputting a direct-current voltage that is set to be substantially equal to that of said first negative feedback amplifier in a non-signal state;
• and
• an inverting amplifier, connected between said second non-inverting input terminal of said second negative feedback amplifier and said first non-inverting input terminal of said first negative feedback amplifier, for operating said second negative feedback amplifier in a phase opposite to that of said first negative feedback amplifier.

A vertical deflection circuit comprising:

• a first negative feedback amplifier having a first inverting input terminal, a first non-inverting input terminal, and a first output terminal, said first non-inverting input terminal being supplied with a saw-tooth wave, said first output terminal being connected to one terminal of a deflection coil, said deflection coil having another terminal negatively fed back to said first inverting input terminal;
• a second negative feedback amplifier, having a second inverting input terminal, a second non-inverting input terminal that is grounded, and a second output terminal connected to said another terminal of said deflection coil through a resistor, said second output terminal being connected to said second inverting input terminal, and said second output terminal outputting a direct-current voltage that is set to be substantially equal to that of said first negative feedback amplifier in a non-signal state;
• and
• a circuit means, connected between said second inverting input terminal of said second negative feedback amplifier and said first inverting input terminal of said first negative feedback amplifier, for operating said second negative feedback amplifier in a phase opposite to that of said first negative feedback amplifier.