Abstract: The invention relates to an inverter including an output regulating mechanism which is simplified in its construction and suitable for reduction of the manufacturing cost. The output regulating mechanism comprises a volume control adapted to be applied with an input voltage for said booster transformer periodically changing as the inverter oscillates, control means adapted to pulse-convert the output signal of the volume control and thereby to output a control signal which has been pulse width modulated according to the output signal of the volume control, and switching means provided on an input current path for the booster transformer so as to be turned ON and OFF with the control signal provided from the control means.

Abstract: Here is disclosed a push-pull inverter characterized by a thin and small-sized boosting transformer improved to require a dielectric strength as low as possible and to be free from leakage current as well as noise. To realize such improvement, the boosting transformer is provided with a first secondary coil and a second secondary coil between which an impedance element such as a capacitor is connected so as to form together a serial circuit section, an output side of the first secondary coil is connected in a manner to have a same potential as a negative potential of a DC source and a load such as a fluorescent lamp is connected to the respective output sides of the first and second secondary coils.

Abstract: This invention relates to a push-pull inverter used, for example, as a driver for cold-cathode discharge tube, hot-cathode discharge tube, etc. and comprises a boosting transformer including an input coil, an output coil and a feedback coil, and first and second switching elements for input coil current of this transformer, wherein the output of the boosting transformer is divided into a pair of output coil sections connected in series with each other and a conductor section lying between these output coil sections is circuit-arranged so that this conductor section be at the negative potential of the DC source.

Abstract: Here is disclosed a push-pull inverter used to drive a cold cathode discharge tube, a hot cathode discharge tube and the like, comprising a boosting transformer having a first primary coil, a first secondary coil, a second primary coil and a second secondary coil; first and second switching elements each having a control electrode adapted for controllably interrupting primary current flowing through said first and second primary coils; a capacitor connected between the respective control electrodes of the respective switching elements; and a feedback circuit in which one end of the first secondary coil is connected to the control electrode of the first switching element and one end of the second secondary coil is connected to the control electrode of the second switching element so that load current from a load connected between the other ends of the respective first and second secondary coils flows through the capacitor.

Abstract: The present invention has an object to develop a converter allowing dielectric strength of a booster transformer to be reduced by half for miniaturization and security thereof. To achieve this object, the booster transformer is provided with first and second secondary coils so that, every time a switching element is turned ON, the first secondary coil generates positive voltage in reference with the negative terminal potential of a DC source while the second secondary coil generates negative voltage also in reference with the negative terminal potential of the DC source and a sum of these positive and negative voltages is output from the converter as a composite voltage.

Abstract: Here is disclosed a compact transformer comprising a plurality of core elements so combined to form a complete core defining two closed magnetic circuits, one of these magnetic circuits being provided with primary and secondary windings of a first coil and the other magnetic circuit being provided with primary and secondary windings of a second coil so that inductive portions of these first and second coils are simultaneously activated.

Abstract: This invention relates to a push-pull inverter used, for example, as a driver for cold-cathod discharge tube, hot-cathode discharge tube, etc.According to this invention, respective control electrodes of a first switching element and a second switching element are interconnected by a capacitor so that a load current passes through this capacitor and thereby alternately activates the first and second switching element.With such arrangement, a boosting transformer requires no feedback coil and it is possible to eliminate a capacitor for resonance which has conventionally been connected in parallel to a primary coil of said boosting transformer.

Abstract: Here is disclosed a compact transformer comprising a plurality of core elements so combined to form a complete core defining two closed magnetic circuits, one of these magnetic circuits being provided with primary and secondary windings of a first coil and the other magnetic circuit being provided with primary and secondary windings of a second coil so that inductive portions of these first and second coils are simultaneously activated.

Abstract: Here is disclosed an electric part in the form of windings particularly suitable to be implemented as a compact transformer comprising an inner bobbin having a cylindrical coil supporting portion around which a coil has been wound, and first and second outer bobbins having respective coil supporting portions square U-shaped in cross-sections and adapted to enclose the inner bobbin from upper and lower sides, wherein, after a coil has been wound around the coil supporting portions of the first and second outer bobbins, one leg of a core having legs is inserted into the coil supporting portion of the inner bobbin.