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

• Current Assignee: Colin Graham White
• Original Assignee: Colin Graham White
• Inventors: White, Colin Graham
• Primary Examiner(s): Krawczewicz, Stanley T.
• Application Number:
  US05/040,305
• Time in Patent Office: 449 Days
• Field of Search: 307/232,262,269,295 328/109,133,155 324/83D,83Q 329/137
• US Class Current: 327/12
• CPC Class Codes: H03K 5/26 the characteristic being duration, interval, position, frequency, or sequence

Abstract

This invention provides a phase difference detector for detecting when the phase relationship between two waves changes from a predetermined relationship by a predetermined amount. Delay means are provided for relatively delaying the two waves to an extend dependent upon the lead or lag tolerance permitted in the phase relationship between the two waves, and a JK flip-flop circuit is provided to one data input terminal of which one of the two relatively delayed waves are applied and to the other data input terminal of which the same wave inverted is applied. The other of the delayed waves is applied to the sampling input terminal of said circuit.

Claims

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.

2. A detector as claimed in claim 1 and including a second JK flip-flop or similar circuit, means for applying the said other wave to one data input terminal of the second circuit, means for inverting said other wave and applying it to the other data input terminal of the second circuit and means for applying the said one wave to the sampling input terminal of said second circuit.