A bidirectional capacitive isolator includes a capacitive isolation network, a first transceiver circuit, and a second transceiver circuit. The capacitive isolation network includes a first port and a second port. The first transceiver circuit is coupled to the first port of the capacitive isolation network, and includes circuitry configured to cancel signal transmitted by the first transceiver circuit from signal received by the first transceiver circuit. The second transceiver circuit is coupled to the second port of the capacitive isolation network, and includes circuitry configured to cancel signal transmitted by the second transceiver circuit from signal received by the second transceiver circuit.

Systems, apparatuses, and methods for compression of frequent data values across narrow links are disclosed. In one embodiment, a system includes a processor, a link interface unit, and a communication link. The link interface unit is configured to receive a data stream for transmission over the communication link, wherein the data stream is generated by the processor. The link interface unit determines if blocks of data of a first size from the data stream match one or more first data patterns and the link interface unit determines if blocks of data of a second size from the data stream match one or more second data patterns. The link interface unit sends, over the communication link, only blocks of data which do not match the first or second data patterns.

Digital video signals are transmitted from a transmitter to a receiver via a digital video interface including shielded twisted pair cables that are surrounded by an over-braid shield. The over-braid shield is connected to a chassis ground at a transmitting end and the receiving end. An interface conveys the received signals to receiver processing circuitry. The interface is connected to an isolated ground, isolating the receiver processing circuitry. The twisted pairs are also connected to the isolated ground, such that a return current is forced back through the twisted pair cable shields rather than the over-braid shield. This reduces electromagnetic emissions and confines transients primarily to the over-braid shield.

The invention relates to a network communication system (50), in particular for a vehicle, having a communication bus (56), a first communication device (52) and a plurality of second communication devices (54) which are connected to one another via the communication bus (56), wherein the first communication device (52) comprises a bias voltage source (64) for generating a constant bias voltage on the communication bus (56), the first communication device (52) comprises a current measurement apparatus (66) for capturing the current on the communication bus (56), the network communication system (50) has a terminating resistor (60) which is arranged in parallel with the plurality of second communication devices (54), the first communication device (52) comprises a first modulation apparatus (72) for modulating a current set by the bias voltage and the terminating resistor (60) on the communication bus (56), each second communication device (54) comprises a second modulation apparatus (78) for modulating the current set by the bias voltage and the terminating resistor (60), and each second communication device (54) has a second voltage measurement apparatus (80) for capturing a voltage at the terminating resistor (60). The invention also relates to a corresponding method for communication in a network communication system (50).

A device for electrical energy supply and/or data supply of end devices using inductive coupling includes an oblong holding device and a number of adjacently arranged transmitting coils that generate magnetic field lines along the holding device. Structurally narrow end devices have flat receiving coils whose plane is oriented perpendicular to the longitudinal extension of the holding device.

A Power Over Data Lines (PoDL) system includes Power Sourcing Equipment (PSE) supplying DC power and Ethernet data over a single twisted wire pair to a Powered Device (PD). The PSE supplies the DC current and AC data through a cascaded coupling network including a series of AC-blocking inductor stages having different inductances to substantially filter out the AC component and pass the DC component. The data is supplied to the wires via capacitors. The PD may have a matched decoupling network for providing the separated DC power and data to a PD load.

A fiber optic-based communications network includes: a power insertion device, connected to multiple fiber links from a data source, configured to provide power insertion to a hybrid fiber/power cable connected to at least one fiber link of the multiple fiber links; the hybrid fiber/power cable, connecting the power insertion device to a connection interface device, configured to transmit data and power from the power insertion device to the connection interface device; and the connection interface device, configured to provide an interface for connection to an end device via a power over Ethernet (PoE)-compatible connection and to provide optical to electrical media conversion for data transmitted from the power insertion device to an end device via the hybrid fiber/power cable and the PoE-compatible connection.

A circuit for compensation of baseline voltage wander operating at an input of an isolator is disclosed. The circuit can compensate electronically the frequency response of an isolation circuit (e.g., a transformer) by increasing the pass band in the low frequency region in order to minimize the baseline wander caused by low inductance windings. The compensation circuit can be used to inject a current ramp proportional to the amplitude and the duration of the pulse and inversely proportional to the open circuit inductance of the isolation circuit.

A transceiver circuit with a front-end and a back-end is provided. The front-end has terminals for coupling to a first and a second capacitor and tunable resistors coupled between the terminals and a reference terminal. The front-end is configured to receive receiver signals at the terminals utilizing a first setting for the resistors. The front-end is configured to generate a receiver data packet based on the receiver signals. The back-end is configured to check the receiver data packet for errors with respect to a defined tuning data packet. If an error is found, the back-end sets the resistors to a default setting. If no errors are found, the back-end sets the resistors to a second setting.

LED drive control circuitry according to one embodiment outputs an LED drive control signal serving as driving a light emitting diode included in a photocoupler that performs insulation communication in synchronization with a reference clock signal. The LED drive control circuit includes a duty cycle changer that changes a duty cycle of the LED drive control signal in accordance with the reference clock signal and a signal synchronized with the reference clock signal.