Abstract: A coupling circuit for power line communications includes a coupling transformer having first and second mutually coupled windings, with the first winding connectable to a power line. The second winding includes a pair of intermediate taps with one or more tuning inductor therebetween. The inductor or inductors are set between a first portion and a second portion of the second winding of the coupling transformer. A switch member is provided coupled with the inductor. The switch member is selectively actuatable to short-circuit the inductor.

Abstract: A device for transmitting data between a data transmission device of a vehicle and a data transmission device of a communications network, as part of a charging process of an electrical energy store of the vehicle, is disclosed. The vehicle data transmission device is based on a first communications protocol with a first signal level, while the communications network data transmission device is based on a second communications protocol with a second signal level. The device includes a signal-matching device having at least one first coupling transformer, which couples a data transmission device of a charging station to the data transmission devices of the vehicle and of the communications network via respective coils. The signal-matching device is configured to match the first signal level to the second signal level and vice versa.

Abstract: PDs that can be supplied through the LAN line are discriminated from PDs that cannot be so supplied as a function of the resistance of the supply line and of the voltage drop caused by nonlinear elements in series therewith. The values of these two parameters are estimated by applying two distinct voltages to the supply terminals of the LAN line and sensing the relative steady-state currents absorbed by the power supply line, and by processing voltage and current values for estimating the resistance of the line and the voltage drop caused by nonlinear elements connected in series therewith.

Abstract: A power line communication system includes a power distribution device connected to two power lines, a plurality of power line communication devices and a first coupler device electrically connected between the first power line and the second power line. The first coupler device is configured at the last end of the power line communication system. Before a transmitting device transmits data to a receiving device, the first coupler device determines whether to couple the power lines with each other according a first signal quality between the transmitting and the receiving device when the power lines are not coupled with each other and a second signal quality between the transmitting and the receiving device when the power lines are coupled with each other.

Abstract: A method and apparatus for monitoring instantaneous load current is disclosed. In one embodiment, an integrated circuit includes a voltage regulator and at least one functional unit implemented thereon. The voltage regulator includes a supply circuit configured to provide a voltage to the functional unit, and a sense circuit configured to determine an amount of current provided to the functional unit by the supply circuit. The sense circuit may determine the instantaneous load current being provided to the functional unit. An indication circuit is configured to provide, to the functional unit, an indication of the amount of current supplied thereto by the supply circuit.

Abstract: A bicycle electrical system is provided with a first electric component, a second electric component, and a third electric component. The first electric component includes a first electric power line communication section. The second electric component includes a second electric power line communication section. The third electric component includes a third electric power line communication section. The first and second electric power line communication sections are connected with a first electric power line such that the first and second electric power line communication sections conduct communications via the first electric power line. The second and third electric power line communication sections are connected with a second electric power line such that the second and third electric power line communication sections conduct communications via the second electric power line.

Abstract: An antenna tuner is placed between a Power Amplifier (PA) and an antenna. The antenna tuner includes programmable components that can be tuned in order to effect an impedance translation between the antenna and the PA output. In an embodiment, the antenna tuner is adapted dynamically based on changes in the impedance of the antenna. In another embodiment, the antenna tuner is controlled based on measurement of the voltage reflection coefficient S11.

Abstract: A mechanism is provided for providing reliable redundant data communications. The mechanism issues a request for data to a set of powered elements using a set of secondary communication channels in response to a reduction in a level of communications being detected. The set of secondary communication channels comprises one or more alternating current power lines and the request is sent as data injected onto the alternating current power lines to the set of powered elements. The mechanism receives the data using the set of secondary communication channels from the set of powered elements, analyzes the data to determine a set of recovery actions to restore the level of communications, and issues the set of recovery actions to the set of powered elements using the set of secondary communication channels.

Abstract: A method, system, and computer program product are provided for communicating to a powered element in a rack system. A controller injects communication data onto power lines that provides power to a plurality of powered elements. The powered elements determine if the communication data transmitted via the power lines should be used for configuration using an address embedded within the communication data. The powered elements compare an embedded target address within the communication data to the address of the particular element. If there is a match between the addresses, the corresponding powered element processes the communication data to configure the powered element. As a result, data may be communicated over the power lines thereby eliminating the need for separate communication lines. Thus, the amount of cables required to interconnect the powered elements of the distributed data processing system may be reduced by eliminating the communication lines from the system configuration.

Abstract: RFID tag circuits, tags, and methods are provided for backscattering a received RF wave using a controllable admittance difference between the ON state and the OFF state. The admittance difference is controlled responsive to a control signal. In some embodiments, the control signal is generated responsive to a command. In others, the control signal is generated responsive to detecting the power level of the received RF wave. In those, the inherent behavior of the admittance difference can be shaped as desired. For example, it can be such that the backscatters with advantageously more power when it is away from the reader, and with less power when it is close to the reader, so as to meet regulatory requirements.