Aspects of this disclosure relate to a multiplexer with a hybrid acoustic passive filter. The multiplexer includes a plurality of filters configured to filter respective radio frequency signals, a shared filter coupled between each of the plurality of filters and a common node, and a radio frequency filter coupled to the common node. At least a first filter of the plurality of filters includes acoustic resonators and a non-acoustic passive component. Related multiplexers, wireless communication devices, and methods are disclosed.

A transistor device includes a transistor cell comprising a channel region, a gate runner that is electrically connected to a gate electrode on the channel region and physically separated from the gate electrode, and a harmonic termination circuit electrically connected to the gate runner between the gate electrode and an input terminal of the transistor device, the harmonic termination circuit configured to terminate signals at a harmonic frequency of a fundamental operating frequency of the transistor device.

Systems for bi-directional single-ended transmission are described. For example, a system may include a receiver with a first differential input terminal and a second differential input terminal, wherein the first differential input terminal is coupled to a first node and the second differential input terminal is coupled to a second node; a transmitter with an output terminal coupled to a third node; a first inductor connected between the first node and the third node; a second inductor connected between the second node and the third node; and a shunt resistor connected between the third node and a ground node.

A capacitance element body is configured by two or more capacitors, the capacitors being formed of a dielectric layer and at least three internal electrodes, the internal electrodes each being laminated via the dielectric layer and arranged to allow a center of gravity of an electrode body forming electrostatic capacitance to be arranged on a straight line in a lamination direction. In the capacitance element body, said two or more capacitors are serially connected in a lamination direction of the internal electrodes. Furthermore, external terminals, each being electrically connected to an electrode body forming electrostatic capacitance, are formed in side surfaces of the capacitance element body.

A filter circuit includes an input node, an output node, a first filtering element and a second filtering element. The first filtering element has a first terminal coupled to the input node and a second terminal, and is configured to provide a first signal conducting path toward the second terminal for conducting a first signal received at the input node to the second terminal. The second filtering element has a first terminal coupled to the input node and a second terminal, and is configured to provide a second signal conducting path toward the output node for conducting a second signal received at the input node to the output node. The second terminal of the first filtering element and the second terminal of the second filtering element are open-circuit terminals.

Exemplary embodiments of the disclosure are related to inductors, e.g., at least a pair of planar inductors for a wireless apparatus, for example transceivers used in a wireless device. A device may include a first planar inductor configured on a first area of a substrate. The first planar inductor includes a first loop configured to produce a first magnetic field in a first direction and a second loop configured to produce a second magnetic field in a second direction. The device further includes a second planar inductor configured on a second area of the substrate. The second planar inductor includes a third loop configured to produce a third magnetic field in a third direction. The third loop may be configured to surround the first loop and divide the second loop into an enclosed area and an external area.

Exemplary embodiments of the disclosure are related to inductors, e.g., at least a pair of planar inductors, for wireless communication apparatus, for example transceivers used in a wireless device. A device may include a first planar inductor configured on a first area of a substrate. The first planar inductor includes a first loop configured to produce a first magnetic field in a first direction and a second loop configured to produce a second magnetic field in a second direction. The device further includes a second planar inductor configured on a second area of the substrate. The second planar inductor includes a third loop configured to produce a third magnetic field in a third direction and a fourth loop configured to produce a fourth magnetic field in a fourth direction. The second area may at least partially overlap the first area.

A common-mode noise filter is provided, and comprises a first transmission structure and a second transmission structure. At least one first transmission unit is connected between a first signal input end and a first signal output end of the first transmission structure in series. At least one second transmission unit is connected between a second signal input end and a second signal output end of the second transmission structure in series. Two first capacitors are connected between the first signal input end and the second signal input end in series, and connected at a first node together. A first common-mode noise suppression unit is connected between the first node and a reference potential, and comprises a second capacitor and a first lossy element connected to the second capacitor in series or parallel. The first common-mode noise suppression unit can absorb a common-mode noise via the first lossy element.

Systems for bi-directional single-ended transmission are described. For example, a system may include a receiver with a first differential input terminal and a second differential input terminal, wherein the first differential input terminal is coupled to a first node and the second differential input terminal is coupled to a second node; a transmitter with an output terminal coupled to a third node; a first inductor connected between the first node and the third node; a second inductor connected between the second node and the third node; and a shunt resistor connected between the third node and a ground node.

An integrated circuit (IC) device may include a first substrate having an inductor ground plane in a conductive layer of the first substrate. The integrated circuit may also include a first inductor in a passive device layer of a second substrate that is supported by the first substrate. A shape of the inductor ground plane may substantially correspond to a silhouette of the first inductor.