GB901214A - Improvements relating to communication and like transmission systems - Google Patents

Improvements relating to communication and like transmission systems

Info

Publication number
GB901214A
GB901214A GB371260A GB371260A GB901214A GB 901214 A GB901214 A GB 901214A GB 371260 A GB371260 A GB 371260A GB 371260 A GB371260 A GB 371260A GB 901214 A GB901214 A GB 901214A
Authority
GB
United Kingdom
Prior art keywords
branch paths
hybrids
hybrid
windings
common path
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
GB371260A
Inventor
Eric Robert Mcewan Reid
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries Ltd
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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB371260A priority Critical patent/GB901214A/en
Publication of GB901214A publication Critical patent/GB901214A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/10—Intermediate station arrangements, e.g. for branching, for tapping-off

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

901,214. Multiplex systems. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Jan. 20, 1961 [Feb. 2, 1960], No. 3712/60. Class 40 (4). In a frequency division multiplex carrier system a coupling circuit comprising two hybrid transformers and an impedance bridge connects five branch paths to a common path, one of the branch paths being for supervision and being connected into the circuit as a phantom. As shown, the branch paths P1 and P2 are connected to the differential windings w1, w2 of a hybrid H1, and the branch paths P3, P4 are connected to the differential windings w1<SP>1</SP>, w2<SP>1</SP> of a hybrid H2. The commoning windings of the hybrids w3, w3<SP>1</SP>, are connected across opposite diagonals of an impedance bridge IB and from centre-taps X, Y, connect the fifth branch path P5. One of the arms of bridge IB comprises the input, or output, depending on which way the coupling circuit acts, of an amplifier A connected to the common path P6. Matching is discussed for the case of symmetrical hybrids to determine the value of resistors Rs1 to Rs7, given the value of resistor Rs8 or Rs9. The hybrids need not, however, be symmetrical. By using two such coupling circuits involving four hybrids and two bridges, the bridges each having an arm comprised by one of the differential windings of a fifth hybrid the commoning winding of which is connected to the common path, ten branch paths may be coupled.
GB371260A 1960-02-02 1960-02-02 Improvements relating to communication and like transmission systems Expired GB901214A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB371260A GB901214A (en) 1960-02-02 1960-02-02 Improvements relating to communication and like transmission systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB371260A GB901214A (en) 1960-02-02 1960-02-02 Improvements relating to communication and like transmission systems

Publications (1)

Publication Number Publication Date
GB901214A true GB901214A (en) 1962-07-18

Family

ID=9763533

Family Applications (1)

Application Number Title Priority Date Filing Date
GB371260A Expired GB901214A (en) 1960-02-02 1960-02-02 Improvements relating to communication and like transmission systems

Country Status (1)

Country Link
GB (1) GB901214A (en)

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