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PHASE DIFFERENCE DETECTORS

  • US 3,600,690 A
  • Filed: 05/25/1970
  • Issued: 08/17/1971
  • Est. Priority Date: 06/23/1969
  • Status: Expired due to Term
First Claim
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1. A phase difference detector for detecting when the phase relationship between two waves changes from a predetermined relationship by a predetermined amount, means for relatively delaying said waves to an extent dependent upon the lead or lag tolerances permitted in the phase relationship between the two waves, a JK flip-flop or like circuit, means for applying one of said two relatively delayed waves to one data input terminal of said circuit, means for inverting said one wave and applying it to the other data input terminal of the circuit and means for applying the other of said two relatively delayed waves to the sampling input terminal of said circuit.

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