Abstract: A multi-lamp tube controlling circuit includes at least one driving unit and having at least one switch individually, at least one transformer connected to the driving unit and the lamp, a current detection unit connected to the lamp for obtaining the loading current of the lamp, a pulse-width modulation (PWM) controlling unit connected to the current detection unit for obtaining the loading current so as to output a pulse-width modulation signal, at least one voltage detection unit connected to the lamp and the transformer for obtaining the loading voltage of the lamp, and a multi-lamp tube PWM controlling unit connected to the driving unit, the voltage detection unit, and the PWM controlling unit for receiving the pulse-width modulation signal and the loading voltage of the lamp for outputting a controlling signal to drive the switch for switching after processing the pulse-width modulation signal and the loading voltage.

Abstract: A half-bridge-type control signal generating circuit outputs two control signals to control directly and drive switching actions of two electronic switches of a half-bridge-type circuit architecture. The half-bridge-type control signal generating circuit comprises an AND-gate logic unit, a NAND-gate logic unit, a circuit protection unit, a function generator, a clock generator, a soft boot unit connected to the clock generator, a sample and hold unit, a first comparator connected to the soft boot unit and the function generator, an OR-gate logic unit connected to the soft boot unit, the first comparator, the AND-gate logic unit and the NAND-gate logic unit, a second comparator connected to the sample and hold unit, the function generator, the AND-gate logic unit and the NAND-gate logic unit, and a dead time control unit connected to the function generator, the AND-gate logic unit and the NAND-gate logic unit.

Abstract: A push/pull-type control signal generating circuit outputs two control signals to control directly and drive switching actions of two electronic switches of a push/pull-type circuit architecture. The push/pull-type control signal generating circuit has a first AND-gate logic unit, a second AND-gate logic unit, a circuit protection unit, a function generator, a clock generator, a soft boot unit connected to the clock generator, a sample and hold unit, a first comparator connected to the soft boot unit and the function generator, an OR-gate logic unit connected to the soft boot unit, the first comparator and the first and second AND-gate logic units, a second comparator connected to the sample and hold unit, the function generator and the first and second AND-gate logic units, and a dead time control unit connected to the function generator and the first and second AND-gate logic units.