Abstract: Interface circuits for differential signal channels. The interface circuit includes, for example, a transformer, a common mode choke, and a bidirectional transient voltage suppressor (TVS) diode. The transformer is coupled to two circuit side terminals of a differential signal channel. The common mode choke is coupled to the transformer. The common mode choke is also coupled to the two line side terminals of the differential signal channel via a first signal path and a second signal path. The bidirectional TVS diode includes a first output connection coupled to the first signal path. The bidirectional TVS diode also includes a second output connection coupled to the second signal path.

Abstract: Interface circuits for differential signal channels. The interface circuit includes, for example, a transformer, a common mode choke, and a bidirectional transient voltage suppressor (TVS) diode. The transformer is coupled to two circuit side terminals of a differential signal channel. The common mode choke is coupled to the transformer. The common mode choke is also coupled to the two line side terminals of the differential signal channel via a first signal path and a second signal path. The bidirectional TVS diode includes a first output connection coupled to the first signal path. The bidirectional TVS diode also includes a second output connection coupled to the second signal path.

Abstract: A connected light node (CLN) induction light ballast module for powering an induction lamp includes a printed circuit board having components mounted thereon and an earth ground region electrically isolated from a PCB ground region. A heat sink is disposed on a lower layer of the printed circuit board and electrically connected to the earth ground region, wherein a parasitic capacitance occurs between the printed circuit board ground region and the heat sink. A capacitive shield sandwiched by a lower insulating pad and an upper insulating pad is electrically isolated from the heat sink supporting the shield. A damping network electrically connects the capacitive shield to the PCB ground region. Switch-mode power converters are mounted above the upper insulating pad and the shield. The damping network suppresses noise by a parasitic capacitance between the PCB ground region and the heat sink during high frequency power converter operation.

Abstract: A connected light node (CLN) induction light ballast module for powering an induction lamp includes a printed circuit board having components mounted thereon and an earth ground region electrically isolated from a PCB ground region. A heat sink is disposed on a lower layer of the printed circuit board and electrically connected to the earth ground region, wherein a parasitic capacitance occurs between the printed circuit board ground region and the heat sink. A capacitive shield sandwiched by a lower insulating pad and an upper insulating pad is electrically isolated from the heat sink supporting the shield. A damping network electrically connects the capacitive shield to the PCB ground region. Switch-mode power converters are mounted above the upper insulating pad and the shield. The damping network suppresses noise by a parasitic capacitance between the PCB ground region and the heat sink during high frequency power converter operation.

Abstract: A device for measuring currents induced in a CAN bus harness. In some embodiments, the device includes a first termination node, a second termination node, a current separator, a detection circuit, and a power source circuit. The current separator circuit has an RF transformer connected to the first termination node and separates a common mode RF current and a differential mode RF current of an RF current signal. The detection circuit is connected to the current separator circuit and receives at least one of the common mode RF current and the differential mode RF current from the separator circuit. The detection circuit also converts the common mode RF current and differential mode RF current to an non-RF output signal. The power source circuit provides power to the detection circuit.

Abstract: A device for measuring currents induced in a CAN bus harness. In some embodiments, the device includes a first termination node, a second termination node, a current separator, a detection circuit, and a power source circuit. The current separator circuit has an RF transformer connected to the first termination node and separates a common mode RF current and a differential mode RF current of an RF current signal. The detection circuit is connected to the current separator circuit and receives at least one of the common mode RF current and the differential mode RF current from the separator circuit. The detection circuit also converts the common mode RF current and differential mode RF current to an non-RF output signal. The power source circuit provides power to the detection circuit.