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Fully differential demodulator with variable gain, and method for demodulating a signal

  • US 7,663,432 B2
  • Filed: 02/15/2008
  • Issued: 02/16/2010
  • Est. Priority Date: 02/15/2007
  • Status: Active Grant
First Claim
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1. A demodulator, comprising:

  • input terminals, for receiving an amplitude-modulated input signal, defined by a carrier signal at a carrier frequency and by a modulating signal;

    an amplifier stage having a gain; and

    a gain-control stage coupled to the amplifier stage and configured to vary the gain of the amplifier stage according to a sinusoid of a frequency equal to the carrier frequency on the basis of the carrier signal.

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