GB905838A - Improvements in or relating to apparatus for converting time-division multiplex signals to frequency-division multiplex signals - Google Patents

Improvements in or relating to apparatus for converting time-division multiplex signals to frequency-division multiplex signals

Info

Publication number
GB905838A
GB905838A GB328960A GB328960A GB905838A GB 905838 A GB905838 A GB 905838A GB 328960 A GB328960 A GB 328960A GB 328960 A GB328960 A GB 328960A GB 905838 A GB905838 A GB 905838A
Authority
GB
United Kingdom
Prior art keywords
signals
frequency
division multiplex
multiplex signals
channel
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
GB328960A
Inventor
Edward Reginald Thomas
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.)
General Electric Co PLC
Original Assignee
General Electric Co 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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB328960A priority Critical patent/GB905838A/en
Publication of GB905838A publication Critical patent/GB905838A/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
    • H04J1/04—Frequency-transposition arrangements
    • H04J1/05—Frequency-transposition arrangements using digital techniques

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

905,838. Multiplex systems. GENERAL ELECTRIC CO. Ltd. May 1, 1961 [Jan. 29, 1960], No. 3289/60. Class 40 (4). [Also in Group XL (c)] In an apparatus for converting time-division multiplex signals to frequency-division multiplex signals, the signals in each case being amplitude modulated, the train of amplitudemodulated pulses is supplied via lead 2 to channel gates 1 which are supplied with gating pulses over lead 3 to select the component signals of the respective channels. The signals passed by each gate are narrow pulses rich in harmonics and their associated sidebands and having a pulse recurrence frequency, in the example given, of 10 kc/s., which is fed through an associated band-pass filter 4 having a pass band between 6 and 10 kc/s. to a channel amplifier 5. The outputs of the amplifiers 5, in the frequency range 6-10 kc/s. are supplied to corresponding frequency changers 6 which translate the signals into respective frequency bands 30-34, 36-40, 40-44 kc/s. &c., these signals being combined and passed through a group amplifier 9 to a common output circuit 10. In an alternative arrangement each filter 4 is arranged to select a sideband of a harmonic frequency in a band unique to that channel whereby the frequency-changers 6 may be dispensed with.
GB328960A 1960-01-29 1960-01-29 Improvements in or relating to apparatus for converting time-division multiplex signals to frequency-division multiplex signals Expired GB905838A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB328960A GB905838A (en) 1960-01-29 1960-01-29 Improvements in or relating to apparatus for converting time-division multiplex signals to frequency-division multiplex signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB328960A GB905838A (en) 1960-01-29 1960-01-29 Improvements in or relating to apparatus for converting time-division multiplex signals to frequency-division multiplex signals

Publications (1)

Publication Number Publication Date
GB905838A true GB905838A (en) 1962-09-12

Family

ID=9755513

Family Applications (1)

Application Number Title Priority Date Filing Date
GB328960A Expired GB905838A (en) 1960-01-29 1960-01-29 Improvements in or relating to apparatus for converting time-division multiplex signals to frequency-division multiplex signals

Country Status (1)

Country Link
GB (1) GB905838A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4075429A (en) * 1975-04-21 1978-02-21 Kokusai Denshin Denwa Kabushiki Kaisha Transmultiplexer
US7275937B2 (en) 2004-04-30 2007-10-02 Finisar Corporation Optoelectronic module with components mounted on a flexible circuit
US7311240B2 (en) 2004-04-30 2007-12-25 Finisar Corporation Electrical circuits with button plated contacts and assembly methods
US7425135B2 (en) 2004-04-30 2008-09-16 Finisar Corporation Flex circuit assembly

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4075429A (en) * 1975-04-21 1978-02-21 Kokusai Denshin Denwa Kabushiki Kaisha Transmultiplexer
US7275937B2 (en) 2004-04-30 2007-10-02 Finisar Corporation Optoelectronic module with components mounted on a flexible circuit
US7311240B2 (en) 2004-04-30 2007-12-25 Finisar Corporation Electrical circuits with button plated contacts and assembly methods
US7425135B2 (en) 2004-04-30 2008-09-16 Finisar Corporation Flex circuit assembly

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