×

Digital delay FM demodulator with filtered noise dither

  • US 4,772,853 A
  • Filed: 08/12/1987
  • Issued: 09/20/1988
  • Est. Priority Date: 08/12/1987
  • Status: Expired due to Fees
First Claim
Patent Images

1. A digital FM demodulator, comprising:

  • means for producing a square wave signal having a frequency related to the FM signal;

    means for generating a random signal;

    means for filtering said random signal;

    means for modulating the duration of a portion of the square wave;

    means for applying said filtered random signal to the modulating means;

    means for delaying said modulated square wave;

    means for combining said modulated square wave with said delayed modulated square wave; and

    means for extracting a DC component from said combined signal;

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×