| 摘要 |
939,599. Transistor monostable state circuits. PHILIPS ELECTRICAL INDUSTRIES Ltd. July 9, 1962 [July 12, 1961], No. 26283/62. Class 40 (6). A monostable trigger circuit comprises transistors I, II of the same conductivity type, a capacitor 6 connected from the collector of transistor I to the base of transistor II, and a third transistor III of the same conductivity type as the first two, the emitter-collector path of which shunts the capacitor 6, and the base of which is connected to a point of constant potential. In the stable state transistor I is conducting and transistors II and III are cut-off. Application of a trigger pulse to the base of transistor I cuts it off charging capacitor 6, and switching on transistor II, the time during which transistor II is conducting (the unstable state) being determined by the charge time of the capacitor. At the termination of the charge time transistor II cuts off and transistor III becomes conductive to allow the capacitor to discharge rapidly through it. Specification 837,946 is referred to. |
