| 摘要 |
1367114 Speeding switching of transistors SOC ITALIANA TELECOMUNICAZIONI SIEMENS SpA 15 Sept 1971 [18 March 1971] 43055/71 Heading H3T [Also in Division G3] A D.C. regulator circuit with a switching transistor Ts1 controlled by pulses from a constant current generator Ts3, R, Z1, includes a further transistor Ts2 which is blocked when transistor Ts1 is conducting but which saturates when transistor Ts1 is turned off, so as to connect the base of transistor Ts1 to a negative voltage provided by a winding N2. In this way, stored charge is removed and switching time is reduced. |
