×

Signal detection apparatus

  • US 4,535,459 A
  • Filed: 05/26/1983
  • Issued: 08/13/1985
  • Est. Priority Date: 05/26/1983
  • Status: Expired due to Term
First Claim
Patent Images

1. Phase detector means comprising, in combination:

  • data signal input means for supplying input data;

    first D flip-flop means, including D and C (clock) input terminal means and Q output terminal means;

    second D flip-flop means, including D and C (clock) input terminal means and Q output terminal means;

    first EOR (exclusive OR) means, including input means and output means, connected to receive input signals at said input means thereof from the D and Q terminal means of said first flip-flop meanssecond EOR (exclusive OR) means, including input means and output means, connected to receive input signals at said input means thereof from the D and Q terminal means of said second flip-flop meansmeans connecting said data signal input means to said D input terminal means of said first flip-flop means;

    means connecting said Q output terminal means of said first flip-flop means to said D input terminal means of said second flip-flop means;

    first and second integrating means, each including input means and output means, connected to said output means of said first and second EOR means for receiving input signals therefrom;

    VCO (controlled variable frequency oscillator) means, including input means and first and second opposite phase signal output means, connected to said output means of said first and second integrator means for receiving output signals therefrom, said VCO means varying in frequency as a function of the sum of the signals received from said first and second integrator means;

    means connecting said first and second output means of said VCO to said C input means of said first and second D flip-flop means respectively; and

    means for outputting retimed data from the Q output terminal means of said second flip-flop means.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×