Abstract: A passive circuit element for influencing pulses has two series-connected inductances which connect a first input terminal to a first output terminal, a first capacitor which is connected between the connection point of the inductances and the second terminals which are either directly connected to one another or which coincide with one another. The inductances are formed by spiral conductor paths which are arranged on a substrate and which are oppositely directed to one another. The spiral conductor paths are arranged concentrically above one another in two different conductor path layers which are separated by an insulating layer. The inner ends of the spiral conductor paths are connected by means of a contact extending through the insulating layer and to which a plate of the first capacitor is also connected.

Abstract: A device for the transmission of digital push-pull signals with a push-pull transmitter and a push-pull receiver includes a push-pull directional coupler connected between the transmitter and the receiver for providing coupling pulses to set and reset the push-pull receiver, which may be designed as a bistable trigger stage, the push-pull signals to be transmitted being obtained from the outputs of the push-pull receiver. The directional coupler comprises an arrangement of at least five parallel conductors of which at least one conductor is grounded. One end of each conductor of a first pair of the pulse conductors is connected to a respective output terminal of the transmitter, while corresponding ends of another pair of pulse conductors are connected to the input terminals of the receiver, the other ends of the respective conductor pairs being bridged by respective impedances which correspond to the value of the surge impedances of the conductors.