Abstract: A circuit arrangement for suppressing interfering signals in the receiving branch of a modem containing a transmitting branch and the receiving branch, of a household appliance equipped with a transmitting device for transmitting and a receiving device for receiving data signals. When using a receiving circuit of the modem with an input circuit having a relatively high input impedance compared with the impedance of a useful signal source delivering data signals, to which data signals are supplied by the useful signal source having a relatively low impedance in comparison and in the presence of the interfering signal sources which deliver the interfering signals which have a relatively high impedance, an ohmic resistance is connected in parallel to the input circuit with a relatively low resistance compared to the input impedance.

Abstract: A circuit arrangement for suppressing interference signals in the receive branch of a modem containing a transmit branch and the receive branch, of a household appliance equipped with a transmitting device for transmitting and a receiving device for receiving data signals, using a bandpass filter.

Abstract: The object is to prevent, or at least to reduce, disturbance signals at the output of the voltage supply circuit, appearing when switching off a voltage supply circuit, in particular a data signal device appertaining to a household device, which can be connected to additional data signal devices by way of a data network, on a cut-off signal. The output voltage thereof is reduced initially to a determined minimum level, such that when a greater requirement of the output current of the current/voltage supply device, which can be controlled by a voltage output circuit, is signaled, the cut-off signal appears and the device produces an output voltage and an output current corresponding to determined output. The output voltage is reduced to the determined minimum level and it is then switched off.

Abstract: A circuit arrangement for suppressing interfering signals in transmitted signals emitted by a modem of a household appliance equipped with a transmitting device for transmitting and a receiving device for receiving data signals, the modem containing a transmitting branch and a receiving branch. A low-pass filter for attenuating the interfering signals, which have interfering signal frequencies higher than the transmitted signal frequencies and which are emitted by a transmitter unit of the modem, is contained in the transmitting branch of the modem. In addition, a band elimination filter that filters out only the aforementioned interfering signals is connected upstream from the low-pass filter on the side of the transmitter unit.

Abstract: Data signals are transmitted from and/or to household appliances between a first transceiver device and a second transceiver device via an AC power supply line system within a transmission frequency range that exceeds the frequency of the AC power supply. The respective transceiver device is connected to the AC power supply line system by way of a filter array having a power supply low pass filter connected in the input circuit of a power supply unit of the associated transceiver device and is provided with an impedance curve such that its impedance in the transmission frequency range has a value that is at least twice as high as the impedance of the AC power supply line system in the transmission frequency range.