A distributed power system including multiple DC power sources and multiple power modules. The power modules include inputs coupled respectively to the DC power sources and outputs coupled in series to form a serial string. An inverter is coupled to the serial string. The inverter converts power input from the serial string to output power. A signaling mechanism between the inverter and the power module is adapted for controlling operation of the power modules.

Methods of powering a radio that is mounted on a tower of a cellular base station are provided in which a direct current (“DC”) power signal is provided to the radio over a power cable and a voltage level of the output of the power supply is adjusted so as to provide a substantially constant voltage at a first end of the power cable that is remote from the power supply. Related cellular base stations and programmable power supplies are also provided.

System and method for improving the shaving experience by providing improved visibility of the skin shaving area. A digital camera is integrated with the electric shaver for close image capturing of shaving area, and displaying it on a display unit. The display unit can be integral part of the electric shaver casing, or housed in a separated device which receives the image via a communication channel. The communication channel can be wireless (using radio, audio or light) or wired, such as dedicated cabling or using powerline communication. A light source is used to better illuminate the shaving area. Video compression and digital image processing techniques are used for providing for improved shaving results. The wired communication medium can simultaneously be used also for carrying power from the electric shaver assembly to the display unit, or from the display unit to the electric shaver.

System and method for improving the shaving experience by providing improved visibility of the skin shaving area. A digital camera is integrated with the electric shaver for close image capturing of shaving area, and displaying it on a display unit. The display unit can be integral part of the electric shaver casing, or housed in a separated device which receives the image via a communication channel. The communication channel can be wireless (using radio, audio or light) or wired, such as dedicated cabling or using powerline communication. A light source is used to better illuminate the shaving area. Video compression and digital image processing techniques are used for providing for improved shaving results. The wired communication medium can simultaneously be used also for carrying power from the electric shaver assembly to the display unit, or from the display unit to the electric shaver.

A dual cavity, low power, outdoor combination line amplifier package for cable telecommunication systems is disclosed. It comprises: a dual-cavity main frame, cast in one piece and sectioned into an upper cavity and a lower cavity; a hardline entry cover, having a hardline receptacle PCB with a power supply fixed thereon, electrically and environmentally sealing on one side of the upper cavity; a tap plate cover, having a tap plate PCB fixed thereon and mounted with a plurality of taps, electrically and environmentally sealing on the other side of the upper cavity with the taps facing externally; a gain module heatsink cover, having a gain module PCB and a passive PCB fixed thereon, electrically and environmentally sealing on one side of the lower cavity; and a smart app accessories cover, having a smart access cover PCB fixed thereon, electrically and environmentally sealing on the other side of the lower cavity.

An amplifier circuit acting as a line driver in a line between a central station and field devices connected thereto comprising: a DC/DC converter integrated in the circuit as a power stage comprising a DC/pulse converter with two electrically isolated switching stages; a logic block preceding the converter, generating control signals for the switches from a PWM signal and feeding them into the converter in an electrically isolated manner using drivers; a priority block generating the PWM signal; a first and a second controller. The priority block forwards output from the first or second controller. The first controller generates a fault signal based on a voltage limit and an output voltage fed back within the amplifier circuit via a feedback path. The second controller generates a fault signal based on a current limit and the output current. The central station defines the current limit and the voltage limit.

A signal transmission device includes a communication unit that is connected to an electronic device by a signal wiring and performs communication with the electronic device via the signal wiring, a signal processing unit that performs signal processing related to the communication, a power supply unit that supplies direct current to the electronic device via the signal wiring, and a filter circuit connected between the signal wiring and the power supply unit. The filter circuit includes a plurality of filters having frequency characteristics different from each other, and the signal processing unit acquires communication quality information indicating quality of the communication in at least two or more frequency bands, and determines a state of the filter circuit based on the communication quality information.

Technologies directed to cable-loss compensation are described. An apparatus includes a triplexer, a front-end module (FEM) circuit, and a control circuit. The triplexer is coupled to a radio frequency (RF) cable. The triplexer receives a first RF signal and a DC power signal from a device via the RF cable and sends a detection signal being indicative of a transmit power level of the first RF signal to the device via the RF cable. The transmit power level includes an insertion loss of the RF cable. The FEM circuit is coupled to the triplexer and includes a power amplifier (PA). The control circuit is coupled to the triplexer and measures the transmit power level of the first RF signal and converts the first RF signal into the detection signal. The control circuit sends the detection signal back to the device via the RF cable and enables the PA.

The present disclosure relates to method performed by a battery charger configured to notify an electrically connected vehicle (120) about status of the battery charger, the method comprising measuring output (O) of the battery charger to the electrically connected vehicle, determining a charging mode (CM) of the battery charger, determining pulse characteristics using the measured output and the determined charging mode (CM), generating a pulse train using the determined pulse characteristics, wherein the pulse train is indicative of the status of the battery charger.

A system and method is provided for data over power in an aircraft that includes a direct current power source for providing power over power lines to devices onboard the aircraft and a data injector coupled to the power lines for digitally modulating radio frequency data onto twisted pair data over power lines to provide data and power to the devices. A controller is coupled to the direct current power source and the data injector for providing the data to digitally modulate the radio frequency onto the twisted pair data over power lines such that power for the devices onboard the aircraft and data for control of the device onboard the aircraft are provided to the devices onboard the aircraft over the twisted pair data over power lines.