Patent ID: 7301998
Filing Date: 2007-11-27
Classification: H04L

Abstract:
1. A method comprising: receiving an analog input signal comprising symbols temporally spaced on symbol intervals; tapping the analog input signal at fractional symbol intervals to provide a plurality of signal taps at the fractional symbol intervals; applying each of a plurality of coefficients to a corresponding signal tap to generate an equalized signal; and for at least one of the taps, generating an updated coefficient no more frequently than once per symbol interval, wherein generating an updated coefficient no more frequently than once per symbol interval further comprises generating an error signal on each symbol interval which is representative of an estimated error associated with the equalized signal in the symbol interval and combining the error signal with a signal tap associated with the updated coefficient over the symbol interval to provide a correlation signal, said generating an updated coefficient no more frequently than once per symbol interval further comprising maintaining a charge pump voltage which is representative of the previous coefficient, updating the charge pump voltage on symbol intervals based, at least in part, upon the correlation signal to provide a charge pump voltage representative of the updated coefficient, and selectively inhibiting an update of the charge pump voltage on at least some of the symbol intervals in response to a change in polarity of the analog input signal during a symbol interval.