Methods and circuits for adjusting parameters of a transceiver

A circuit for transforming a corrupt signal to an equalized signal, comprising:

• a receiver for receiving said corrupt signal over a channel from a transmitter wherein said corrupt signal has a wave form, said receiver further comprising:
• an equalizer for equalizing said corrupt signal using an adjustable parameter;
• and
• an error sampler for sampling data points of said corrupt signal between an upper limit and a lower limit for each of a positive threshold (TH) range and of a negative threshold (−TH) range;
• and wherein:
• said error sampler generates a performance metric of said corrupt signal based on a density of said data points of said corrupt signal that are disposed between said upper limit and said lower limit of said positive threshold (TH) range and of said negative threshold (−TH) range;
• said error sampler sends said performance metric from said error sampler to said equalizer for adjusting said adjustable parameter;
• said equalizer automatically adjusts said adjustable parameter based on said performance metric;
• and
• said equalizer equalizes said signal from said corrupt signal to said equalized signal based on said adjustable parameter;
• and wherein:
• said error sampler is not required to sample data points of said corrupt signal between said lower limit of said positive threshold (TH) range and said upper limit of said negative threshold (−TH) range.

A method for transforming a corrupt signal to an equalized signal in a receiver, said method comprising:

• receiving at said receiver, said corrupt signal having a wave form;
• selecting at said receiver, a level for sampling of data of said signal wherein said level is located at a point of said wave form;
• establishing at said receiver, an upper limit and a lower limit for each of a positive threshold (TH) range and of a negative threshold (−TH) range for said sampling of data, wherein said upper limit and said lower limit are disposed an equal distance from said level;
• sampling at said receiver, data points from said corrupt signal;
• generating, in an error sampler disposed in said receiver, a performance metric of said corrupt signal based on a density of said data points of said corrupt signal that are disposed within said upper limit and said lower limit of said positive threshold (TH) range and of said negative threshold (−TH) range:
• adjusting at said receiver, said upper and lower limits based on said density of said data points that are located between said upper and lower limits;
• and
• equalizing said corrupted signal to said equalized signal using said performance metric based on said density;
• and wherein:
• said sampling of data points of said corrupt signal at said receiver is not required between said lower limit of said positive threshold (TH) range and said upper limit of said negative threshold (−TH) range.

A circuit for determining thresholds for calibrating parameters of a signal, comprising:

• a receiver for receiving said signal over a channel from a transmitter wherein said signal has a wave form, said receiver further comprising:
• an equalizer for equalizing said signal using an adjustable parameter;
• and
• an error sampler for sampling data of said signal disposed between an upper limit and a lower limit for each of a positive threshold (TH) range and of a negative threshold (−TH) range, for generating a performance metric based on a density of data points disposed between said upper and lower limits of said positive threshold (TH) range and of said negative threshold (−TH) range, and for adjusting of said upper and lower limits based on said density of said data points that are located between said upper and lower limits of said positive threshold (TH) range and of said negative threshold (−TH) range;
• and wherein:
• said signal is transformed from a corrupted signal to an equalized signal using said adjustable parameter which is automatically adjusted based on said performance metric;
• and
• said sampling of data points of said signal at said error sampler is not required between said lower limit of said positive threshold (TH) range and said upper limit of said negative threshold (−TH) range.