Active resistance summer for a transformer hybrid

An electrical circuit in a communications channel, comprising:

• an active resistive summing circuit which produces a receive signal as a difference between a composite signal and a replica transmission signal, the composite signal comprising a transmission signal component and a receive signal component;
• and
• an analog baseline correction current control circuit which controls the magnitude of the composite signal,
• wherein the composite signal, the replica transmission signal, and an output of the analog baseline correction current are directly connected together at a common node of the active resistive summing circuit.

An electrical circuit in a communications channel, comprising:

• an active resistive summer having a first input which receives a composite signal that includes a transmission signal component and a receive signal component, a second input which receives a replica transmission signal, a third input which receives an analog baseline correction current, and an output which provides a receive signal which comprises the composite signal minus the replica signal;
• and
• a baseline correction current control circuit which controls the magnitude of the analog baseline correction current to thereby control the magnitude of the composite signal,
• wherein the composite signal, the replica transmission signal, and the analog baseline correction current are directly connected together at a common node of the active resistive summer.

A communication method for a communications channel, comprising:

• receiving at a first input a composite signal that includes a transmission signal component and a receive signal component;
• receiving at a second input a replica transmission signal;
• receiving at a third input an analog baseline correction current;
• providing an analog baseline correction current to substantially prevent the magnitude of the composite signal from exceeding a predetermined value of an operating parameter of the electrical circuit;
• and
• providing a receive signal comprising the composite signal minus the replica signal at an output,
• wherein the composite signal, the replica transmission signal, and the analog baseline correction current are directly connected together at a common node.

A communication method for a communications channel, comprising:

• producing a receive signal as a difference between a composite signal and a replica transmission signal, the composite signal comprising a transmission signal component and a receive signal component;
• controlling the magnitude of the composite signal;
• receiving at a first input a first differential component of the composite signal;
• receiving at a second input a second differential component of the composite signal;
• receiving at a third input a common-mode voltage signal;
• and
• providing at an output a baseline correction current control signal to control an analog baseline correction current,
• wherein the composite signal, the replica transmission signal, and the baseline correction current control signal are directly connected together at a common node.

A method for a communications channel comprising:

• receiving at a first input a composite signal that includes a transmission signal component and a receive signal component;
• receiving at a second input a replica transmission signal;
• receiving at a third input an analog baseline correction current;
• controlling the magnitude of the analog baseline correction current to thereby control the magnitude of the composite signal;
• and
• providing at an output a receive signal which comprises the composite signal minus the replica signal,
• wherein the composite signal, the replica transmission signal, and the analog baseline correction current are directly connected together at a common node.

An electrical circuit for a communications channel, comprising:

• means for receiving at a first input a composite signal that includes a transmission signal component and a receive signal component;
• means for receiving at a second input a transmission signal;
• means for receiving at a third input an analog baseline correction current;
• means for providing a receive signal comprising the composite signal minus the replica signal;
• and
• means for providing the analog baseline correction current to substantially prevent the magnitude of the composite signal from exceeding a predetermined value of an operating parameter of the electrical circuit,
• wherein the composite signal, the transmission signal, and the analog baseline correction current are directly connected together at a common node.

An electrical circuit for a communications circuit, comprising:

• means for producing a receive signal as a difference between a composite signal and a replica transmission signal, the composite signal comprising a transmission signal component and a receive signal component;
• means for controlling the magnitude of the composite signal;
• means for receiving at a first input a first differential component of the composite signal;
• means for receiving at a second input a second differential component of the composite signal;
• means for receiving at a third input a common-mode voltage signal;
• and
• means for providing at an output analog baseline correction current control signal,
• wherein the composite signal, the replica transmission signal, and the analog baseline correction current control signal are directly connected together at a common node of the producing means.

An electrical circuit for a communications channel, comprising:

• means for receiving at a first input a composite signal that includes a transmission signal component and a receive signal component;
• means for receiving at a second input a replica transmission signal;
• means for receiving at a third input an analog baseline correction current;
• means for controlling the magnitude of the analog baseline correction current to thereby control the magnitude of the composite signal;
• and
• means for providing at an output a receive signal which comprises the composite signal minus the replica signal,
• wherein the composite signal, the replica transmission signal, and the analog baseline correction current are directly connected together at a common node.