Huber+suhner Ag

Beat Herrmann

Uhland Goebel

Mischa Graeni

Gregor Kuehne

Frank Felbier

The invention relates to a protective circuit () for the input-side protection of an electronic device () operating in the maximum frequency range from high-power interfering impulses in the working frequency range of the device (), said protective circuit () between an input () and an output () comprising a first limiting circuit () having at least one gas discharge tube (GDT, GDT) for limiting high interference powers and a second limiting circuit () disposed behind the first limiting circuit (), said second limiting circuit having semi-conductor components (D, . . . , D) for limiting smaller interference powers. Protection from particularly high interference powers is achieved in that the first limiting circuit () comprises two gas discharge tubes (GDT, GDT) connected in parallel and preferably identical.

Protective circuit for the input-side protection of an electronic device operating in the maximum frequency range

The anti-interference filter and lightning arrester device is equipped with two series-connected gas capsule diverters (). With the gas capsule diverters () a switching configuration () is connected. This switching configuration () is implemented such that in the event of an interference, the gas capsule diverters () can be reliably reset to the nonconducting state. This is even possible in the presence of a DC voltage and/or high-frequency signals.

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Herisau, Switzerland

Beat Herrmann