| 摘要 |
PCT No. PCT/JP82/00308 Sec. 371 Date Mar. 30, 1983 Sec. 102(e) Date Mar. 30, 1983 PCT Filed Aug. 7, 1982 PCT Pub. No. WO83/00591 PCT Pub. Date Feb. 17, 1983.A power switching transistor drive circuit including a preamplifier (PAP), a base circuit (BSC) for driving a power switching transistor (QL), and a pulse transformer (PT) for electromagnetically coupling the preamplifier (PAP) and the base circuit (BSC). The power switching transistor (QL), which is connected to the output of the vbase circuit (BSC), being on/off controlled based on an input signal applied to the preamplifier (PAP). The preamplifier (PAP) is provided with a low impedance circuit connected in series with the primary coil of the pulse transformer (PT) and forming a closed circuit with the primary coil in response to a flyback voltage generated in the secondary coil of the pulse transformer (PT). |
