Patent ID: 7120193

Claim:
An apparatus including a decision feedback equalizer with dynamic feedback control for adaptively controlling a pre-slicer data signal that is sliced to provide a post-slicer data signal, comprising: first signal combining circuitry that combines at least first and second feedback signals with an input signal representing a plurality of data to provide a pre-slicer signal; signal slicing circuitry, coupled to said first signal combining circuitry, that slices said pre-slicer signal to provide a post-slicer signal indicative of said plurality of data; first decision feedback circuitry, coupled to said signal slicing circuitry, that processes said post-slicer signal in response to at least one adaptation control signal to provide said first feedback signal; second decision feedback circuitry, coupled to said signal slicing circuitry, that delays and processes said post-slicer signal in response to a plurality of adaptation control signals to provide a delayed post-slicer signal and said second feedback signal; and adaptation control circuitry, coupled to said first and second decision feedback circuitries, that further delays and processes said delayed post-slicer signal in response to a difference signal indicative of a difference between said pre-slicer and post-slicer signals to provide said at least one and plurality of adaptation control signals, and includes tapped delay circuitry that further delays said delayed post-slicer signal to provide a plurality of successively further delayed post-slicer signals, and second signal combining circuitry, coupled to said tapped delay circuitry, that combines said plurality of successively further delayed post-slicer signals and said difference signal to provide said at least one and plurality of adaptation control signals, and includes signal multiplication circuitry that multiplies said plurality of successively further delayed post-slicer signals and said difference signal to provide a plurality of resultant signals; and signal integration circuitry, coupled to said signal multiplication circuitry, that integrates respective ones of said plurality of resultant signals to provide said at least one and plurality of adaptation control signals.