Communication systems and methods over direct current (DC) power conductors to remote subunits may include interrupt windows in a power signal on a DC power conductor for safety reasons. The timing of rising and falling edges of the interrupt window may be modified, thereby changing the duration, period, or position within a period of the interrupt window. In effect, interrupt windows within the DC power signal may be pulse width modulated to send data between a power source and one or more subunits. Pulse width modulation (PWM) of the DC power signal preserves the safety features, but allows data and/or commands to be transferred between the power source and any subunits.

Signal correction circuitry is described that improves the integrity of data transmitted over a serial data interface without interrupting the communication between the connected devices. The signal correction circuitry includes edge correction circuitry that speeds up the rising and falling edges of the data signal(s). The signal correction circuitry also includes DC compensation circuitry that boosts the level(s) of the data signal(s).

Aspects relate to a charging station configured to transfer power between an electric aircraft and a power grid via a charging connection. In one or more embodiments, charging station may communicate with the power grid and/or electric aircraft via a communication network. For example, the charging station may be configured to receive a supply request from a power grid or a demand request from an electric aircraft and subsequently generate a control signal that transfers electrical power between the power grid and the electric aircraft via the charging connection.

Systems, methods and devices for a coaxial cable transmission system. A power supply receives a primary power signal from a power source. The power supply generates a switched direct current power signal from the primary power signal. A power gateway receives the switched direct current power signal over a coaxial cable from the power supply. The power gateway generates a secondary power signal from the switched direct current power signal. A load device receives the secondary power signal from the power gateway. In some implementations, the power supply generates the switched direct current power signal at a positive direct current voltage level for a first part of a time period and at a negative direct current voltage level for a second part of the time period.

Radio frequency signal boosters are provided herein. In certain embodiments, a signal booster system includes a signal booster that is proximately located to an outdoor base station antenna. Implementing the signal booster system in this manner can provide a number of advantages relative to a configuration in which the signal booster is far from a base station antenna. For example, a long cable connected from an indoor signal booster to an outdoor base station antenna can be several meters long, resulting in significant cable loss that degrades transmit power and/or receiver sensitivity.

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 system (e.g., a power and communication system for remote components) can include a first wire, a second wire, and a first module operatively connected to the first and second wire. The first module can be configured to output power to and to communicate over the first wire and second wire. The system can include a second module operatively connected to the first module by the first wire and the second wire. The second module can be configured to receive power from the first module and to communicate with the first module over the first wire and/or second wire. The first module can be configured to modify a voltage on at least the first wire to signal to the second module to provide serial communication to the first module via the first wire and/or second wire.

Disclosed are a communication method, a communication circuit and a communication system. A first device can modulate, according to communication data to be sent, parameters of a current signal to be processed, so as to form a communication signal and output same to a second device, and the second device can parse the communication signal so as to obtain communication data.

A wired communication systems, a subscriber device and a method, and more specifically related to initialization and/or update of communication parameters used for communication through the wired communication systems. An access node comprises at least one processor and memory storing instructions that when executed by the at least one processor cause a local transceiver of the access node to transmit signaling data via a subscriber line to a remote transceiver, the signaling data identifying particular symbol positions within a sequence of symbols transmitted over the subscriber line during show-time as being suitable for characterizing a direct communication channel between the local transceiver and the remote transceiver.

In a communication apparatus, an analog circuit includes a circuit element to be connected to a first conductor, and processes a differential signal. A communication circuit receives, via a connection circuit, a differential signal processed by the analog circuit, and generates a signal for which the potential of a second conductor is used as a reference potential based on the received differential signal. An inductor is connected between the first conductor and the second conductor. The connection circuit includes a circuit element different from a capacitor. The analog circuit (21), the connection circuit, the communication circuit, the inductor, the first conductor, and the second conductor are housed in a conductive housing box.