| 摘要 |
PURPOSE:To stabilize an output even when a power source voltage varies by applying outputs on both ends of a feedback coil, via a resistor, to a center tap of an input coil to which a positive electrode of a D.C. power source is connected and a switching element gate through which a negative electrode of the D.C. power source is connected to both ends of an input coil. CONSTITUTION:A positive electrode of a D.C. power source 11 is connected to a center tap of a primary winding 15 via a choke coil 16. A negative electrode of the D.C. power source is connected to both ends of the primary winding 15 via FETs 12 and 13. Outputs on both ends of a feedback coil 23 are connected to the FETs 12 and 13. A drain of the FET 12 is connected to the negative electrode of the power source 11 via resistors 29 and 22, and a drain of the FET 13 is connected to the negative electrode of the power source 11 via resistors 28 and 19. A bias voltage is generated between the gates and sources of the FETs 12 and 13. Thereby, a stable A.C. voltage is generated on a secondary winding 24 even when a source voltage varies. |
