A low voltage drive circuit (LVDC) includes a digital to digital converter that converts transmit digital data into a digital input signal, wherein the transmit digital data is synchronized to a clock rate of a host device and the digital input signal is synchronized to a clock rate of a bus to which the LVDC is coupled. An output limited digital to analog is converter converts the digital input signal into analog outbound data by generating a DC component and converting the digital input signal into an oscillating component at a first frequency, wherein magnitude of the oscillating component is limited to a range that is less than a difference between magnitudes of power supply rails of the LVDS, and wherein the oscillating component and the DC component are combined to produce the analog outbound data. A drive sense circuit conveys the analog outbound data as variances in loading of the bus at the first frequency and wherein analog inbound data is represented within an analog receive signal as variances in loading of the bus at a second frequency.

To obtain a communication apparatus capable of reducing the consumption of electric power.

A communication system according to the present disclosure includes a transmitter that generates a first signal including communication data and sends the first signal through a communication terminal in a first operation mode, and that generates a second signal including a predetermined first signal pattern and having a transition rate lower than the first signal and sends the second signal through the communication terminal in a second operation mode, and a controller that sets an operation mode for the transmitter to either of a plurality of operation modes including the first operation mode and the second operation mode.

A method for a bus interface circuit is described. According to one exemplary embodiment, the method comprises coding a first data stream by assigning first symbols to falling and rising edges of the first data stream, and coding a further data stream by assigning second symbols to the edges or levels of said further data stream. A symbol sequence is constructed from the first symbols and second symbols, wherein said symbol sequence is constructed in such a manner that the first symbols are always delayed by the same value relative to the associated edges of the first data stream. The method also comprises transmitting the symbol sequence via a galvanically isolating component, and decoding the symbol sequence transmitted via the galvanically isolating component in order to reconstruct the first data stream and the further data stream.

One example discloses an interface circuit, including: an inductive coil having a first, second and third terminal; wherein the first terminal is coupled to an external interface port; wherein the second terminal is coupled to a first communication port; wherein the third terminal is coupled to a second communication port; and wherein the inductive coil is configured to attenuate an equivalent capacitance from at least one of the terminals.

The sampling data signal and the sampling synchronizing clock are generated by sampling the data signal and the synchronizing clock, and the first driving pulse signal and the second driving pulse signal are generated based on the sampling data signal and the sampling synchronizing clock, and the isolator is driven by the first driving pulse signal and the second driving pulse signal.

A method of estimating a noise present on a 2-wire line connected to a modem using a plurality of frequency bands is implemented by a noise estimation device connected to the 2-wire line. The method comprises obtaining a first voltage value of a differential mode voltage at the two wires of the secondary side of the differential mode circuit, the first voltage value measured on the plurality of frequency bands and a second voltage value of a common mode image voltage corresponding to a voltage at the two wires of the secondary side of the common mode circuit, resulting from said differential mode voltage, the second voltage value being measured on the plurality of frequency bands and transmitting the first voltage value and the second voltage value to a calculating module configured to provide a noise estimate based on the first and second voltage values.

Methods, systems, and apparatus to increase common-mode transient immunity in isolation devices is disclosed. An example apparatus includes a current mirror including an input terminal and an output terminal; a transistor including a gate terminal, a first current terminal, and a second current terminal, the gate terminal coupled to a reference voltage terminal, the first current terminal coupled to the input terminal of the current mirror, and the second current terminal coupled to an input node; a buffer including an input terminal and an output terminal, the input terminal of the buffer coupled to the output terminal of the current mirror; and a logic gate including an input terminal and an output terminal, the input terminal of the logic gate coupled to the output terminal of the buffer.

The invention relates to a method for communicating between at least one first system (2) and at least one second system (3) via a full-duplex synchronous serial link (4) capable of simultaneously routing data between said systems (2, 3), said data comprising: at least one message (12; 43) from the first system (2) to the second system (3), at least one message (16; 45) from the second system (3) to the first system (2), and a clock signal (13; 44). According to the method: the second system (3) receives a message (12; 43) and a clock signal (13; 44) sent by the first system (2), delayed and substantially in phase; the second system (3) sends the first system (2) a message (16; 45); the clock signal (13; 44) received by the second system (3) is returned (17; 46) to the first system (2) along with the message (16; 45) sent by the second system (3); and the first system (2) receives the message (16; 45) sent by the second system (3) and the returned clock signal (17; 46), delayed and substantially in phase.

Methods and systems for the adaptive selection of an isolation ground for a differential interface are provided. A system for adaptively selecting an isolation ground for a differential interface includes a first body having a first ground reference. The system additionally includes a second body having a second ground reference. Further, the system includes a differential interface through which the first body communicates electrical signals with the second body. Also, the system includes a common ground connection shared between the first body and second. Moreover, the system includes an adaptive isolation connection that adaptively connects the common ground connection to one of the first ground reference and the second ground reference.

A controller comprising a driver interface referenced to a first reference potential, a drive circuit referenced to a second reference potential, and an inductive coupling. The driver interface comprises a first receiver configured to compare a portion of signals having a first polarity on the first terminal of the inductive coupling with a first threshold, and a second receiver configured to compare a portion of signals having a second polarity on the second terminal of the inductive coupling with a third threshold. The drive circuit comprises a first transmitter configured to drive current in a first direction in the second winding to transmit first signals, and a second transmitter configured to drive current in a second direction in the second winding to transmit second signals, the second direction opposite the first direction.