Self-calibrating gain control system

  • US 8,198,940 B2
  • Filed: 05/04/2010
  • Issued: 06/12/2012
  • Est. Priority Date: 05/04/2009
  • Status: Active Grant
First Claim
Patent Images

1. A step gain control system, comprising:

  • an analog amplifier for receiving an analog input signal;

    a digital signal amplifier cascaded with said analog amplifier through an analog to digital converter (ADC) to produce an output signal;

    a gain control circuit;

    a signal detector;

    a gain step correction circuit; and

    said gain control circuit applies a gain adjustment to the analog amplifier and the digital signal amplifier in incremental steps, wherein the signal detector detects an output signal of the digital signal amplifier and connects a signal to the gain step correction circuit.

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