A transmission device for the intrinsically safe transmission of data in an Ethernet network via a core pair of an Ethernet cable is disclosed. The transmission device includes a first sub-path connected to a first wire of the core pair of an Ethernet signal pair and a second sub-path connected to a second wire of the core pair of the Ethernet signal pair. Each sub-path comprises at least one current-limiting resistor and a common-mode rejection unit connected in series to the current-limiting resistor.

An apparatus for performing baseline wander correction is provided. The apparatus may include: a plurality of filters, a common mode voltage generator, and a compensation circuit. The plurality of filters may filter a set of input signals to generate a set of differential signals, the common mode voltage generator may generate a common mode voltage between the set of differential signals, and the compensation circuit may perform compensation related to baseline wander correction on the set of differential signals. Multiple current paths of the compensation circuit are associated with each other. Through a first current path and a second current path within the current paths, the compensation circuit may perform charge or discharge control on a first capacitor and a second capacitor within the plurality of filters to dynamically adjust compensation amounts of the compensation, to reduce or eliminate a baseline wander effect of the set of differential signals.

A bus system having at least two control devices, each of which has a bus driver. The bus drivers are connected together via at least two bus lines, each of which is equipped with at least one coupling capacitor. A terminal network is connected to the bus lines and consists of at least two resistors and a capacitor; each of the two resistors is connected to one of the bus lines and the resistors are connected together at a central tap. The capacitor of the terminal network lies between the central tap and a ground connection, and the bus system has a reference voltage source. The reference voltage source is connected to the central tap via an element. The voltage of the reference voltage source has a value between an operating voltage of the bus system and ground.

Methods and systems for rapidly recovering from a serious interference. One method includes the following steps: transmitting, by a transmitter to a transceiver over a communication channel, ongoing data at a fixed data rate above 100. Mbps; receiving, by a receiver from the transceiver, an indication indicating that the transceiver is experiencing a serious interference; responsive to the indication, reducing data rate at which the transmitter transmits; storing excess data that cannot be sent during the period of the reduced data rate; and increasing the data rate, at which the transmitter transmits, to a level that enables it to transmit, within less than 1 millisecond from the moment of reducing the data rate, both the stored excess data and the ongoing data at the fixed data rate.

An apparatus for performing baseline wander correction is provided. The apparatus may include: a plurality of filters, a common mode voltage generator, and a compensation circuit. The plurality of filters may filter a set of input signals to generate a set of differential signals, the common mode voltage generator may generate a common mode voltage between the set of differential signals, and the compensation circuit may perform compensation related to baseline wander correction on the set of differential signals. Multiple current paths of the compensation circuit are associated with each other. Through a first current path and a second current path within the current paths, the compensation circuit may perform charge or discharge control on a first capacitor and a second capacitor within the plurality of filters to dynamically adjust compensation amounts of the compensation, to reduce or eliminate a baseline wander effect of the set of differential signals.

Methods and systems are described for receiving a plurality of signals via a plurality of wires of a multi-wire bus, the plurality of signals corresponding to symbols of a codeword of a vector signaling code, generating, using an interconnected resistor network connected to the plurality of wires of the multi-wire bus, a plurality of combinations of the symbols of the codeword of the vector signaling code on a plurality of output nodes, the plurality of output nodes including a plurality of pairs of sub-channel output nodes associated with respective sub-channels of a plurality of sub-channels, and generating a plurality of sub-channel outputs using a plurality of differential transistor pairs, each differential transistor pair of the plurality of differential transistor pairs connected to a respective pair of sub-channel output nodes of the plurality of pairs of sub-channel output nodes.

System, methods and apparatus are described that facilitate transmission of data, particularly between two devices within electronic equipment. Transmission lines are selectively terminated in an N-phase polarity encoded transmitter when the transmission lines would otherwise be undriven. Data is mapped to a sequence of symbols to be transmitted on a plurality of wires. The sequence of symbols is encoded in three signals. A first terminal of a plurality of terminals may be driven such that transistors are activated to couple the first terminal to first and second voltage levels. The first terminal may further be driven such that a dedicated transistor is activated to couple the first terminal to an intermediate voltage level.

Terahertz (THz) or millimeter wave (mmW) band characterization of a differential-mode device under test (DUT) is performed using a non-contact probing setup based on an integrated circuit that includes the on-chip DUT and an on-chip test fixture as follows. A differential transmission line pair is operatively coupled with the DUT. A first differential antenna pair at a first end of the transmission line pair has a first antenna connected only with the first transmission line and a second antenna connected only with the second transmission line. A second differential antenna pair is likewise connected with a second end of the differential transmission line pair. A THz or mmW transmitter radiates a probe THz or mmW beam to the first differential antenna pair, and an electronic analyzer receives a THz or mmW signal radiated by the second differential antenna pair responsive to the radiation of the probe THz or mmW beam to the first differential antenna pair, thus enabling no-contact S-parameter measurements for characterizing differential-mode, on-wafer, active or passive devices and integrated circuits.

A PoDL system conducts differential data and DC power over the same wire pair, and various DC coupling techniques are described that improve DC voltage coupling while attenuating AC common mode noise. Pairs of differential mode chokes (DMCs) are used to share current supplied by a power supply. In one embodiment, one DMC is coupled to the line side of a common mode choke (CMC), and one DMC is coupled to the PHY side of the CMC. The line-side DMC has windings that are loosely magnetically coupled so that DMC does not present a very low impedance to AC common mode noise on the wires. Therefore, the performance of the wires' RC termination circuitry is not adversely affected by the line-side DMC when minimizing reflections of common mode signals. The DMCs may use the same magnetic core, and the CMC may be series CMCs that used the same magnetic core.

In a Power over Data Lines (PoDL) system that conducts differential data and DC power over the same wire pair, various DC coupling techniques are described that improve DC voltage coupling while attenuating AC common mode noise. Pairs of differential mode chokes (DMCs) are used to share current supplied by a single phase or multi-phase power supply. In one embodiment, one DMC is coupled to the line side of a common mode choke (CMC), and one DMC is coupled to the PHY side of the CMC. The line-side DMC has windings that are loosely magnetically coupled so that DMC does not present a very low impedance to AC common mode noise on the wires. Therefore, the performance of the wires' RC termination circuitry is not adversely affected by the line-side DMC when minimizing reflections of common mode signals.