| 摘要 |
A circuit arrangement for a pulse-controlled connection of a telecommunication signal source to a telecommunication signal load, comprising a semiconductor device having a main current path and a control-current path partially coinciding with the main current path, the main current path forming a low impedance for currents exceeding a given holding current and a high impedance for currents lower than said holding current, the control-current path reducing said holding current for control-currents of a given polarity, in which arrangement said main current path is connected between said source and said load and said control-current path is connected to a control-terminal, a control-pulse source being connected to the control-terminal and a direct-current source being connected to said main current path, wherein between the control-current path and the control-terminal is connected an element whose differential resistance for currents of a polarity opposite said given polarity having a value lower than a given first value has a low value and for currents of said opposite polarity having a value exceeding said given first value has a high value.
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