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High-speed signaling systems with adaptable pre-emphasis and equalization

  • US 9,148,322 B2
  • Filed: 10/28/2011
  • Issued: 09/29/2015
  • Est. Priority Date: 01/20/2005
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a transmitter having circuitry to equalize data to be transmitted over a signaling path, the circuitry including a post-cursor tap, a main tap, and a pre-cursor tap; and

    a receiver to receive the data, the receiver havinga linear equalizer to equalize the data received from the signaling path, anda decision-feedback equalizer with one or more taps to equalize an output of the linear equalizer;

    where, in a first power mode, the circuitry enables the pre-cursor tap to equalize the data to be transmitted to the receiver only for pre-tap interference, and disables the post-cursor tap; and

    where, in a second power mode, the post-cursor tap is enabled, and the linear equalized is disabled.

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