Focusing voltage adjusting circuit and flyback transformer installing the same
AssigneeVictor Company of Japan, Ltd.
InventorYukio Takatori
Life of this patent
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Abstract
A focusing voltage adjusting circuit has a high voltage transformer, to produce and adjust a focusing voltage. The circuit includes a series circuit of a first and a second resistor, connected to a secondary coil of the transformer. Further included in the adjusting circuit is a voltage applying circuit which applies a low d.c. voltage to a terminal of the second resister. The terminal is opposite to another terminal of the second resistor connected to the first resistor. The adjusting circuit varies the d.c. voltage to adjust a focusing voltage appearing at the connection point of the first and second resistors.
Claims18
A focusing voltage adjusting circuit having a high voltage transformer, to produce and adjust a focusing voltage, comprising:
- a rectifier circuit connected to a secondary coil of the high voltage transformer;
- a series circuit of a first and a second resistor, electrically connected to the secondary coil of the high voltage transformer;
- and
- first voltage applying means for applying a d.c. voltage to a terminal of the second resistor, the terminal being opposite to another terminal thereof connected to the first resistor, thus varying the d.c. voltage to adjust a focusing voltage appearing at a connection point of the first and second resistors.
A flyback transformer having a focusing voltage adjusting circuit which is installed therein and has a high voltage transformer, to produce and adjust a focusing voltage, the focusing voltage adjusting circuit comprising:
- a rectifier circuit connected to a secondary coil of the high voltage transformer;
- a series circuit of a first and a second resistor, electrically connected to the secondary coil of the high voltage transformer;
- and
- first voltage applying means for applying a d.c. voltage to a terminal of the second resistor, the terminal being opposite to another terminal thereof connected to the first resistor, thus varying the d.c. voltage to adjust a focusing voltage appearing at a connection point of the first and second resistors.
Dependencies are inferred from the claim text.