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Data rate and PVT adaptation with programmable bias control in a SerDes receiver

  • US 9,325,546 B1
  • Filed: 11/14/2014
  • Issued: 04/26/2016
  • Est. Priority Date: 11/14/2014
  • Status: Active Grant
First Claim
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1. A method of setting bias of a receive data path in a receiver device, the method comprising:

  • initializing, by bias adjustment circuitry, bias settings of at least one of a variable gain amplifier (VGA), a linear equalizer (LEQ), a multiplexer (MUX) and a combiner of the receive data path to initial bias settings;

    detecting a data rate of incoming data of the receive data path;

    measuring, with corresponding sensors, at least one of a present process, temperature and voltage level for the receive data path; and

    associating, by bias adaptation control logic, a combination of the detected data rate and the at least one measured present process, temperature and voltage level for the receive data path with corresponding bias settings for boost and for gain or attenuation in the receive data path; and

    adjusting the bias of the at least one of the variable gain amplifier (VGA), the linear equalizer (LEQ), the multiplexer (MUX) and the combiner of the receive data path based on the associated corresponding bias settings for boost and for gain or attenuation that were associated with the combination of the detected data rate and the at least one of measured present process, temperature, and voltage level for the receive data path.

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