GB765685A - Improvements in electric phase discriminating arrangements - Google Patents

Improvements in electric phase discriminating arrangements

Info

Publication number
GB765685A
GB765685A GB202854A GB202854A GB765685A GB 765685 A GB765685 A GB 765685A GB 202854 A GB202854 A GB 202854A GB 202854 A GB202854 A GB 202854A GB 765685 A GB765685 A GB 765685A
Authority
GB
United Kingdom
Prior art keywords
phase
carrier
valve
output
pulses
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB202854A
Inventor
Charles William Earp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB202854A priority Critical patent/GB765685A/en
Publication of GB765685A publication Critical patent/GB765685A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Relating To Insulation (AREA)

Abstract

765,685. Phase discriminators. STANDARD TELEPHONES & CABLES, Ltd. Jan. 14, 1955 [Jan. 22, 1954], No. 2028/54. Class 40(5) In a phase discriminator for a carrier phase modulated between Π180 degrees the signals carrier and a stable reference carrier of reversed phase relative to the middle phase of the signal are both converted at 3, 4 to short pulses of corresponding phase and frequency, e.g. by squaring, differentiating and taking off only positive going pulses, which are then used to trigger the opposite conditions of stability a bi-stable valve circuit 5, so that the output of one valve is a train of constant amplitude pulses, of duration proportional to the phase difference, which is then integrated to produce a correspondingly proportional D.C. output current. Further, a small portion of the reference wave of reversed phase is added by an attenuator 8. to the phase modulated wave before conversion to ensure that the output assumes the valve corresponding to zero modulation in the event of non- receipt of the signal wave. Specification 594,530 [Group XL] is referred to.
GB202854A 1954-01-22 1954-01-22 Improvements in electric phase discriminating arrangements Expired GB765685A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB202854A GB765685A (en) 1954-01-22 1954-01-22 Improvements in electric phase discriminating arrangements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB202854A GB765685A (en) 1954-01-22 1954-01-22 Improvements in electric phase discriminating arrangements

Publications (1)

Publication Number Publication Date
GB765685A true GB765685A (en) 1957-01-09

Family

ID=9732344

Family Applications (1)

Application Number Title Priority Date Filing Date
GB202854A Expired GB765685A (en) 1954-01-22 1954-01-22 Improvements in electric phase discriminating arrangements

Country Status (1)

Country Link
GB (1) GB765685A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3187262A (en) * 1962-10-01 1965-06-01 Bendix Corp Detector of phase differences between currents of different frequencies
US3813604A (en) * 1972-10-04 1974-05-28 Marconi Co Canada Digital discriminator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3187262A (en) * 1962-10-01 1965-06-01 Bendix Corp Detector of phase differences between currents of different frequencies
US3813604A (en) * 1972-10-04 1974-05-28 Marconi Co Canada Digital discriminator

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