Abstract: A fluorescent lamp ignition circuit of the type including a DC voltage stabilizer to process input voltage into a constant voltage by dropping or boosting, an inductance filter to receive output power supply from the DC voltage stabilizer and to remove surge from it, an oscillator having a transformer, which receives output power supply from the inductance filter and then provides a sin-wave output for igniting a fluorescent lamp, and a feedback circuit connected between the oscillator and the fluorescent lamp to provide a feedback signal to the DC voltage stabilizer, wherein the feedback circuit includes two shunt resistors, which connect the mid-point of the secondary side of the transformer of the oscillator to earth, and two diodes respectively connected between the shunt resistors and the DC voltage stabilizer to form a double-feedback loop.

Abstract: A notebook computer top cover mounting hardware comprising a mainframe having a movable support pivoted to a top edge thereof at one side, and a top cover connected to said movable support by a movable rod and a holding plate for holding a display, wherein engaging a side pin of said movable rod from a first annular groove to a second annular groove inside said holding plate causes said top cover to be rotated through 180.degree. angle for turning said display from a concealed position to the outside for performing a data input operation through a pen device conveniently.