| 摘要 |
PROBLEM TO BE SOLVED: To obtain a variable intermediate voltage generating device which can automatically adjust a screen voltage with ease and superior reliability. SOLUTION: A diode 32 is connected to the winding start of a secondary winding 31 of an FBT and a voltage taken out of its join point A is divided, by using resistors 1 and 2 to control the current flowing to a transistor 3 connected in parallel to the resistance 2, thereby supplying a required screen voltage. The voltage from the winding beginning end of the secondary winding 31 is divided by resistors, and the current flowing to the resistance is controlled by the transistor to vary the voltage which is to be extracted. Consequently, the voltage can be adjusted by a variable resistor arranged in front of the set or the voltage can automatically be adjusted electronically, easily, and accurately by a remote control, etc., thereby improving the reliability.
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