A system includes a first coupled to a printed circuit board (PCB) and a second device coupled to the PCB. The system further includes a link coupled with the first device, the second device, and the PCB. The link includes a clock lane associated with associated with transmitting a clock signal and one or more data lanes corresponding to the clock lane, where the link is configured to transmit ground referenced signaling (GRS)

A radio frequency circuit. In the circuit, a first directional coupler receives a second transmit signal, uses a part of the second transmit signal as a third transmit signal, directly sends the third transmit signal to a first port of a circulator, and obtains a first coupling signal from the second transmit signal; the circulator outputs the third transmit signal through a second port; an impedance tuner transmits the third transmit signal to an antenna port and transmits, to the second port of the circulator, a first input signal from the antenna port; the circulator inputs the first input signal to a second directional coupler through a third port; the second directional coupler obtains a second coupling signal from the first input signal; and a controller adjusts impedance of the impedance tuner according to the first coupling signal and the second coupling signal.

A device receives an analog voltage signal over a single physical electrical connection. The analog voltage signal can be converted into a digital value which can then be correlated to (i) an indication of a connection state of the primary device, and (ii) information about another device (or set of devices) which is connected to the device.

A voltage-mode transmitter includes a calibration circuit having a replica circuit. By adjusting a feedback voltage driving a gate of a replica transistor in the replica circuit so that an impedance of the replica circuit matches an impedance of a variable resistor, the calibration circuit calibrates an output impedance of a single slice driver.

Transmitters and communication systems are disclosed. In one example, a transmitter includes first to third serializers that generate first to third serial signals; a first output section configured to set a voltage of a first output terminal; a first output control circuit configured to control an operation of the first output section on the basis of the first serial signal and the second serial signal; a second output section configured to set a voltage of a second output terminal; a second output control circuit configured to control an operation of the second output section on the basis of the third serial signal and the first serial signal; a third output section configured to set a voltage of a third output terminal; and a third output control circuit configured to control an operation of the third output section on the basis of the second serial signal and the third serial signal.

A biased impedance circuit, an impedance adjustment circuit, and an associated signal generator are provided. The biased impedance circuit is coupled to a summation node and applies a biased impedance to the summation node. A periodic input signal is received at the summation node. The biased impedance circuit includes a switching circuit for receiving an output window signal, wherein a period of the output window signal is shorter than a period of the periodic input signal. The switching circuit includes a low impedance path and a high impedance path. The low impedance sets the biased impedance to a first impedance when the output window signal is at a first voltage level. The high impedance path sets the biased impedance to a second impedance when the output window signal is at a second voltage level. The first impedance is less than the second impedance.

A configurable serial link interface circuit includes a first transceiver for coupling to a first serial link. The first transceiver includes a first transmit circuit to selectively drive first transmit data along the first serial link and a first receive circuit. The first receive circuit selectively receives first receive data along the first serial link. The interface includes a second transceiver for coupling to a second serial link. The second transceiver includes a second transmit circuit to selectively drive second transmit data along the second serial link, a second receive circuit to selectively receive second receive data along the second serial link, and control circuitry to control the selectivity of the first transmit circuit, the second transmit circuit, the first receive circuit and the second receive circuit. For a first mode of operation, the control circuitry configures the first and second transceivers to define a dual-duplex architecture. For a second mode of operation, the control circuitry configures the first and second transceivers to define a single-duplex architecture.

A power feeding apparatus is provided. The power feeding apparatus includes a power feeding unit configured to supply electric power to a power receiving apparatus through a magnetic field; a measuring unit configured to measure an electric characteristic value and to generate a measurement value; a power receiving unit configured to provide a set value; and a foreign substance detection unit configured to detect a foreign substance in the magnetic field based on the set value and the measurement value. A power receiving apparatus, a power feeding system, and a method of controlling power feeding are also provided.

A signal transmitting device includes an output control circuit and a transmitting circuit. The output control circuit generates a first encoded symbol, a second encoded symbol, a third encoded symbol, and a fourth encoded symbol and an inverted flag signal by inverting the logic levels of second bits of a first symbol, a second symbol, a third symbol, and a fourth symbol, and generates a first output control signal and a second output control signal based on the first to fourth encoded symbols, when the maximum transition is present among the first to fourth symbols. The transmitting circuit may transmit the inverted flag signal and a Tx (Transmit) signal generated based on the first and second output control signals.

Systems for bi-directional single-ended transmission are described. For example, a system may include a receiver with a first differential input terminal and a second differential input terminal, wherein the first differential input terminal is coupled to a first node and the second differential input terminal is coupled to a second node; a transmitter with an output terminal coupled to a third node; a first inductor connected between the first node and the third node; a second inductor connected between the second node and the third node; and a shunt resistor connected between the third node and a ground node.