Abstract: Circuitry includes a voltage-controlled switch having a transmitter input, a receiver input, and an output that connects to one of the transmitter input and the receiver input. Passive components form a low-pass filter that is electrically connected to the transmitter input. The passive components are part of a multilayer ceramic passive module that includes a base body made of superimposed dielectric layers and electrically conductive layers. The voltage-controlled switch is on an upper portion or a lower portion of the base body.

Abstract: A functional block of a front-end circuit for a communication device, which is employed for multi-band and/or multi-mode operation, is proposed. By positioning, according to this invention, a pin diode switch in one of the parallel signal paths instead of positioning it on the input side before separating the signal paths, it is possible to do without an impedance transformation network on the input side and to thus reduce the signal loss and the space requirement of the circuit. In a further configuration, the signal paths preferably associated with the adjacent frequency bands are combined on the output side, whereby the further processing of the signals corresponding to the different frequency bands takes place in one path. This for example allows a chip set designed for (n?1) frequency bands to be used in a transmission system designed for n bands. Another embodiment of this invention enables monitoring of the received signal of a system even during operation of the other mode in a multi-mode system.

Abstract: A functional block of a front-end circuit for a communication device, which is employed for multi-band and/or multi-mode operation, is proposed. By positioning, according to this invention, a pin diode switch in one of the parallel signal paths instead of positioning it on the input side before separating the signal paths, it is possible to do without an impedance transformation network on the input side and to thus reduce the signal loss and the space requirement of the circuit. In a further configuration, the signal paths preferably associated with the adjacent frequency bands are combined on the output side, whereby the further processing of the signals corresponding to the different frequency bands takes place in one path. This for example allows a chip set designed for (n?1) frequency bands to be used in a transmission system designed for n bands. Another embodiment of this invention enables monitoring of the received signal of a system even during operation of the other mode in a multi-mode system.

Abstract: The invention relates to an electrical switching module with a current-controlled switch (1), which has a transmitter (2) and a receiver (3) input and an output (4) and which electrically connects one of the inputs (2, 3) to the output (4), as desired, and with passive components which form a low-pass filter (5, 6), which is electrically connected to a transmitter input (2) of the switch, where the passive components are part of a multi-layer ceramic passive module, which includes a main casting (7) made of superimposed dielelectric layers (8) and electrically conductive layers (9), and where the switch (1) is configured on the upper or lower side of the main casting (7). In addition, the invention relates to a switching module configuration and the use of the switching module and the switching module configuration. Due to the current-controlled switch (1) a switching module can be achieved using very little power.