An electronic control device includes: a first input-output terminal and a second input-output terminal through which differential signals are input and output; a transceiver integrated circuit (IC) that transmits and receives the differential signals; a first line that connects the first input-output terminal and the transceiver IC; and a second line that connects the second input-output terminal and the transceiver IC. A first capacitance that is a capacitance between the first line and a ground is at least 80 pF and at most 220 pF, and a second capacitance that is a capacitance between the second line and the ground is at least 80 pF and at most 220 pF.

A signal isolation control apparatus for controlling duplexing of signals to be transmitted through and received from an antenna. The apparatus includes a transmitter chain tap input for coupling to a transmitter chain. An auxiliary transmitter chain is operably coupled to the transmitter chain tap input for processing a transitory signal tapped from the transmitter chain, the auxiliary transmitter chain including an adaptive filter unit and a balance node output for operably coupling to a balance node of a hybrid junction. The adaptive filter unit has a signal leakage monitoring input for operably coupling to an output node of the hybrid junction. The auxiliary transmitter chain is arranged to process the tapped transitory signal in order to generate and apply an isolation signal at the balance node output for maximizing isolation of an output node of the hybrid junction from an input node of the hybrid junction.

A circuit portion for a radio transceiver comprises: a power amplifier for use when the transceiver operates in a transmission mode, a low-noise amplifier for use when the transceiver operates in a reception mode, a voltage control circuit portion, and a transformer. The transformer comprises a primary winding with a terminal for connecting to an antenna, and a secondary winding comprising a first terminal, a second terminal and a third terminal located between the first and second terminals. The power amplifier is connected to the secondary winding, the low-noise amplifier is connected to both the primary and secondary windings and the voltage control circuit portion is connected to the third terminal of the secondary winding. The voltage control circuit portion applies a first voltage to the third terminal when the transceiver operates in the transmission mode and applies a second, different voltage when the transceiver operates in the reception mode.

This disclosure describes techniques for implementing and utilizing a transceiver in a communication device that has two separate radio-frequency (RF) power amplifiers that are optimized to transmit signals using separate communication standards. The power amplifiers may be designed to convert a lower-power RF signal into different higher-power signals according to different standard-mandated, output-power limits. In this way, a communication device may arbitrate between two transceiver chains that include respective power adapters in order to convert lower-power RF signals into different higher-power RF signals. The higher-power RF signals may have different output-power levels that are appropriate for the respective communication standards of the separate transceiver chains.

A physical layer circuitry (PHY) includes: N signal pads, a four-signal physical medium attachment sublayer (PMA) and M shielding pads. The N signal pads include at least four signal pads. The four-signal PMA is coupled to the four signal pads. The M shielding pads include at least one first shielding pad that is coupled to the four-signal PMA. Additionally, the first shielding pin is located between a second signal pad of the four signal pads and a third signal pad of the four signal pads; and M and N are positive integers.

In certain aspects, a chip includes a pad, and a power amplifier having a first output and a second output. The chip also includes a transformer, wherein the transformer includes a first inductor coupled between a first terminal and a second terminal of the transformer, wherein the first terminal is coupled to the first output of the power amplifier, and the second terminal is coupled to the second output of the power amplifier. The transformer also includes a second inductor coupled between a third terminal and a fourth terminal of the transformer, wherein the third terminal is coupled to the pad. The chip also includes a first switch coupled to the fourth terminal, a shunt inductor coupled in parallel with the first switch, and a low-noise amplifier coupled to the third terminal.

The present invention provides pad arrangements, termination circuits, clock/data recovery circuits, and deserialization architecture for a physical layer circuitry including a four-signal or six-signal physical medium attachment sublayer (PMA).

A communication circuit for communication over a voltage isolation barrier, the communication circuit including a pulse driven transformer coupled to a current sensing input, wherein information is transferred in the current domain and wherein during the information transfer, the receiver input is made low ohmic, a current pulse transformer including a primary winding, a core, and a secondary winding, a resistor in parallel with the secondary winding, a current sensor having a low ohmic input to receive a pulse from the secondary winding, and a signal processing unit to extract information from the received pulse.

The present invention provides pad arrangements, termination circuits, clock/data recovery circuits, and deserialization architecture for a physical layer circuitry including a four-signal or six-signal physical medium attachment sublayer (PMA).

A circuit with galvanic isolation includes a series of n cascaded transformers including a first transformer and a last transformer in the series. A transmitter is coupled to the primary winding of the first transformer in the series of cascaded transformers, the transmitter being configured for supplying to the primary winding a transmission signal as a function of an input signal. A receiver is coupled to the secondary winding of the last transformer of the series of cascaded transformers and is configured for receiving at the secondary winding a reception signal transmitted over the series of cascaded transformers. A predistortion module is configured for applying to the transmission signal a predistortion including an (n1)-fold integration, where n is the number of cascaded transformers, of a transmission signal that would be supplied to the input of a sole transformer present in a single-transformer solution.