| 摘要 |
Electronic switch comprising an input stage with a first transistor of which the base is connected to the input of the circuit through a matching network, an output stage with a second transistor and a switching stage with a third transistor of which the emitter-collector path is connected in between a power supply terminal and the emitter of the first transistor, and of which the base is connected to the control input of the switch. The first transistor (T1) is operated in a common emitter circuit, whereby the collector through a matching transformer (L1/L2) and through a forward biased diode (D2) is connected to the input electrode of a second transistor (T2) operating in common base circuit, of which second transistor the output electrode is connected to the output of the switch. The emitter-collector path of the switching transistor (T3) is on the one hand connected in series with the collector-emitter path of the first transistor and is on the other hand connected to the junction between said matching transformer and said diode. |
