Method and system for a fast serial transmit equalization scheme

A method for at least two-bit equalization of an input signal to compensate for a channel frequency response, comprising:

• selecting an equalization step size for each of at least two differential intermediate output signals based on the channel frequency response;
• dividing a tail current into at least three weighted current segments based on the equalization step sizes;
• inputting a differential delayed input signal, two differential intermediate output signals, and the at least three weighted current segments, into at least three differential amplifiers that output at least three output currents, the weighted current segments corresponding to the differential delayed input signal and the two differential intermediate output signals;
• and
• combining the at least three output currents to form an equalized output signal.

A system for transmitting equalized output data, comprising:

• a receiver to output data;
• an equalization system for receiving the data to be output, the equalization system including,
• an equalization step selection subsystem to select equalization step adjustment sizes to adapt to transmit media variations in a channel, and
• an equalization subsystem to receive a delayed input signal and at least two intermediate output signals based on the received data, and the equalization step adjustment sizes from the equalization step selection subsystem, to apply the equalization step adjustment sizes to the at least two intermediate output signals to create at least two adjusted output signals, and to produce the equalized output signal based on the delayed input signal and the at least two adjusted output signals, and
• a transmitter to transmit the equalized output signal utilizing an Ethernet protocol;
• an interconnect to receive the equalized output signal from the transmitter;
• and
• an Ethernet controller to receive the equalized output signal from the interconnect.

A transmitting device to transmit an equalized output signal to a channel, comprising:

• a decision subsystem to decide when an input signal is adjusted, and to produce a delayed input signal and at least two intermediate output signals to assist in adjusting the input signal;
• an equalization subsystem to receive the delayed input signal, the at least two intermediate output signals from the decision subsystem, to apply equalization adjustments to the at least two intermediate output signals to create at least two adjusted output signals, and to produce an equalized output signal compensated for the channel amplitude frequency response based on the delayed input signal and the at least two adjusted output signals;
• and
• a transmitter to send the equalized output signal to the channel.

A system for transmitting equalized output data, comprising:

• a receiver to output data;
• an equalization system for receiving the data to be output, the equalization system including,
• a decision subsystem to decide when an input signal is adjusted, and to produce a delayed input signal and at least two intermediate output signals to assist in adjusting the input signal, and
• an equalization subsystem to receive the delayed input signal, the at least two intermediate output signals from the decision subsystem, to apply equalization adjustments to the at least two intermediate output signals to create at least two adjusted output signals, and to produce an equalized output signal compensated for the channel amplitude frequency response based on the delayed input signal and the at least two adjusted output signals;
• a transmitter to transmit the equalized output signal utilizing an Ethernet protocol;
• an interconnect to receive the equalized output signal from the transmitter;
• and
• an Ethernet controller to receive the equalized output signal from the interconnect.