Automatic gain control system and method

  • US 7,145,490 B2
  • Filed: 07/18/2005
  • Issued: 12/05/2006
  • Est. Priority Date: 09/15/2004
  • Status: Active Grant
First Claim
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1. An automatic gain control system comprising:

  • at least one variable gain stage, the or each variable gain stage having an output, a signal input and a control input, said at least one variable gain stages being connectable in series;

    at least one sensor, the or each sensor having an input and an output, the input of the or each sensor being connectable to a respective output of said at least one variable gain stage;

    an analogue-to-digital converter having an input connectable to the output of one of said at least one variable gain stages, and an output;

    a control unit having an output and an input, the input of the control unit being connectable to the outputs of the sensors and to the output of the analogue-to-digital converter; and

    a digital-to-analogue converter having an input connectable to the output of the control unit, the digital-to-analogue converter further having at least one output, the control inputs of each of the at least one variable gain stages being connectable to an output of the digital-to-analogue converter, the outputs of the digital-to-analogue converter controlling the gain of the at least one variable gain stages.

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