Abstract: Methods and apparatus to compensate for post-training insertion loss variation. Receiver Physical Layer (PHY) circuitry for each receive lane in a link comprising a chain of equalizer components including a Variable Gain Amplifier (VGA). In conjunction with initial link training, the VGA gain is set based on an initial temperature. During link training, one or more of the equalizer components are adjusted to obtain link convergence, followed by transitioning to a “link up” phase under which data transmission and reception begin. While operating in the link up phase, one or more of the equalizer components are adjusted in response to changes in interconnect insertion loss to maintain operation of the link within a link margin. The method may be implemented in various types of links including but not limited to Ethernet, PCIe, CXL, and UPI links.

Abstract: An apparatus is provided which comprises: a data slicer to receive first data sampled by a data clock; an edge slicer to receive second data sampled by an edge clock; and a Least Mean Square (LMS) circuitry coupled to the data and edge slicers, wherein the LSM circuitry is to generate a code to adjust a phase of one of data clock and/or edge clock relative to one another.

Abstract: An apparatus is provided which comprises: a data slicer to receive first data sampled by a data clock; an edge slicer to receive second data sampled by an edge clock; and a Least Mean Square (LMS) circuitry coupled to the data and edge slicers, wherein the LSM circuitry is to generate a code to adjust a phase of one of data clock and/or edge clock relative to one another.

Abstract: In one embodiment, the present invention includes an apparatus having an automatic gain control (AGC) stage to receive an input signal from a communication channel physical medium, a first local gain stage coupled to an output of the AGC stage, an equalizer coupled to an output of the first local gain stage, an echo canceller to receive local data to be transmitted along the communication channel physical medium, and a second local gain stage coupled to an output of the echo canceller. Other embodiments are described and claimed.

Abstract: In one embodiment, a method is provided. In the method of this embodiment, in response, at least in part, to a determination that an idle condition exists, one or more packets may be transmitted to indicate, at least in part, that a transmitter is desired to refrain from transmitting, during one or more predetermined time intervals, to a receiver. Also in the method of this embodiment, also in response, at least in part, to the determination that the idle condition exists, the receiver may be de-activated, at least in part, during the one or more predetermined time intervals. Of course, many alternatives, variations, and modifications are possible without departing from this embodiment.

Abstract: Techniques to perform adaptive interference cancellation are described. A first apparatus may include a timing recovery module to produce a timing recovery command signal, an interference canceller to receive an interference reference signal and produce an interference canceller signal, and an interpolator to couple to the timing recovery module and the interference canceller, the interpolator to receive the timing recovery command signal and the interference canceller signal and produce an interpolated interference canceller signal. A second apparatus may include a time-domain interference canceller to receive an interference reference signal and produce a time-domain interference canceller signal and a frequency-domain interference canceller to receive the interference reference signal and produce a frequency-domain interference canceller signal. Other embodiments are described and claimed.

Abstract: In one embodiment, the present invention includes an apparatus having an automatic gain control (AGC) stage to receive an input signal from a communication channel physical medium, a first local gain stage coupled to an output of the AGC stage, an equalizer coupled to an output of the first local gain stage, an echo canceler to receive local data to be transmitted along the communication channel physical medium, and a second local gain stage coupled to an output of the echo canceler. Other embodiments are described and claimed.

Abstract: According to some embodiments, an Ethernet link speed is determined based on a power-related configuration, and an Ethernet link is negotiated at the link speed. Embodiments may also include determination of whether a power-conserving protocol is enabled, and/or may be implemented by an Ethernet controller.

Abstract: Techniques to perform adaptive interference cancellation are described. A first apparatus may include a timing recovery module to produce a timing recovery command signal, an interference canceller to receive an interference reference signal and produce an interference canceller signal, and an interpolator to couple to the timing recovery module and the interference canceller, the interpolator to receive the timing recovery command signal and the interference canceller signal and produce an interpolated interference canceller signal. A second apparatus may include a time-domain interference canceller to receive an interference reference signal and produce a time-domain interference canceller signal and a frequency-domain interference canceller to receive the interference reference signal and produce a frequency-domain interference canceller signal. Other embodiments are described and claimed.

Abstract: In one embodiment, a method is provided. In the method of this embodiment, in response, at least in part, to a determination that an idle condition exists, one or more packets may be transmitted to indicate, at least in part, that a transmitter is desired to refrain from transmitting, during one or more predetermined time intervals, to a receiver. Also in the method of this embodiment, also in response, at least in part, to the determination that the idle condition exists, the receiver may be de-activated, at least in part, during the one or more predetermined time intervals. Of course, many alternatives, variations, and modifications are possible without departing from this embodiment.

Abstract: According to some embodiments, an Ethernet link speed is determined based on a power-related configuration, and an Ethernet link is negotiated at the link speed. Embodiments may also include determination of whether a power-conserving protocol is enabled, and/or may be implemented by an Ethernet controller.