Methods and devices for wired charging and communication with a wearable device are described. In one embodiment, a symmetrical contact interface comprises a first contact pad and a second contact pad, and particular wired circuitry is coupled to the first and second contact pads to enable charging as well as receive and transmit communications via the contact pads as part of various device states.

Disclosed herein are two-wire communication systems and applications thereof. In some embodiments, a slave node transceiver for low latency communication may include upstream transceiver circuitry to receive a first signal transmitted over a two-wire bus from an upstream device and to provide a second signal over the two-wire bus to the upstream device; downstream transceiver circuitry to provide a third signal downstream over the two-wire bus toward a downstream device and to receive a fourth signal over the two-wire bus from the downstream device; and clock circuitry to generate a clock signal at the slave node transceiver based on a preamble of a synchronization control frame in the first signal, wherein timing of the receipt and provision of signals over the two-wire bus by the node transceiver is based on the clock signal.

Methods and devices for wired charging and communication with a wearable device are described. In one embodiment, a symmetrical contact interface comprises a first contact pad and a second contact pad, and particular wired circuitry is coupled to the first and second contact pads to enable charging as well as receive and transmit communications via the contact pads as part of various device states.

A first device provides both power and data to a second device over a power line connection between the two devices. The first device includes a power line extending from a power supply, a ground line extending from a ground, a first impedance in the power line, and a second impedance in the ground line. A modulator comprised of a transistor and modulator impedance is between the first impedance and the second impedance, and a tank capacitor is between the power line and the ground line, outside the first impedance and second impedance. A comparator is coupled between the first and second impedance. A switch may be included to short out the first and second impedance, thereby enabling transmission of only power for period of time, and return to a mode of transmitting both data and power. The first device may also receive data from the second device over the power line connection.

A method for testing a detection sensor positioned facing a target fixed to a drive shaft that is intended to be installed in a motor vehicle. The method includes generating a pulsed voltage test signal, amplifying the high states of the generated test signal, filtering the amplified test signal so as to obtain a voltage test signal having high states the voltage of which is higher than a predetermined high-state detection threshold and low states the voltage of which is lower than a predetermined low-state detection threshold, and detecting the high states and the low states of the filtered test signal in order to test the sensor.

The invention relates to a cable (12) and a male connector (10, 20) attachable to the cable (12) for transmission of power and data for use in power focused applications, in particular lighting applications. The male connector (10, 20) comprises a contact for power transmission (P), a contact for data communication (D) and optionally a contact for configuration signaling (C), wherein a conversion circuit (11, 21) is configured to translate the configuration signaling (C) to be transmitted via a single twisted pair of signaling wire together with the power transmission (P), and/or the data communication (D). Providing conversion circuitry within the connector allows to combine two or more signals received via respective connectors of the male connector and generate a combined signal to be transmitted over a single pair of twisted signal wire, the connector allows the usage of a cable with much higher flexibility.

A communications network for communication between at least one power electronics element and at least one control unit is disclosed. According to one or more embodiments, the communications network can be described as a communications network having parts or portions thereof employing multi-hop and/or hybrid communication.

An intake air heating system for a vehicle includes: an air heater configured to heat air an intake system of an engine; an air heater control module configured to selectively apply power to the air heater via a power conductor; and a voltage sensor and communication module configured to: measure a voltage on terminals of the air heater; and transmit an indicator of the voltage to the air heater control module on the power conductor, where the air heater control module is further configured to: receive the indicator via the power conductor; determine a resistance of the air heater based on the voltage on the terminals of the air heater and a current through the air heater; and apply power to the air heater based on the resistance of the air heater.

A signal processing device is usable in a communication system and includes a signal path, a signal detector, a signal synthesizer, a transmission unit, and a receive path including an analog-to-digital converter. The signal path transmits a transmission signal that was transmitted by the communication system and that contains a communication signal. The signal detector detects, and generates an activation signal in response to, an interference signal contained in the transmission signal and occurring due to narrowband interferences. The signal synthesizer generates an approximation signal for the interference signal upon the presence of the activation signal. The transmission unit receives the transmission signal transmitted by the signal path and the approximation signal, and outputs a difference signal between the transmission signal and the approximation signal. The analog-to-digital converter converts a signal generated based on the difference signal into a digital signal.

A transmitting apparatus includes a first signal outputter configured to output a first signal to a receiving apparatus via a first line; and a communicator connected to a second line that connects a receiving-side ground node and the first signal outputter with an AC connection, the receiving-side ground node being supplied with a ground potential of the receiving apparatus, and the communicator being configured to transmit a second signal from the transmitting apparatus to the receiving apparatus by causing a direct current, a magnitude of which changes based on a logic level of the second signal, to flow in the second line, or to receive the second signal from the receiving apparatus by detecting a magnitude of a direct current flowing in the second line.