GB601931A - Multi-channel communication system - Google Patents

Multi-channel communication system

Info

Publication number
GB601931A
GB601931A GB13540/45A GB1354045A GB601931A GB 601931 A GB601931 A GB 601931A GB 13540/45 A GB13540/45 A GB 13540/45A GB 1354045 A GB1354045 A GB 1354045A GB 601931 A GB601931 A GB 601931A
Authority
GB
United Kingdom
Prior art keywords
pulse
wave
channel
circuit
saw
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
GB13540/45A
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co 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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB601931A publication Critical patent/GB601931A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/04—Distributors combined with modulators or demodulators
    • H04J3/042—Distributors with electron or gas discharge tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Amplifiers (AREA)

Abstract

601,931. Thermionic distributers. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Nov. 22, 1945, No. 31540.' Convention date, July 1, 1944. [Class 40 (iii)] [Also in Group XL (c)] In a nmlti-channel pulse signalling system each channel circuit is fed from a common triangular wave 'generator and comprises a first rectifier passing current at a predetermined voltage level on the input wave and a second rectifier to determine the 'maximum voltage developed by the first rectifier circuit, a pentode valve being operative in the region between these voltage levels which are different for the different channels. In the time-modulated pulse multiplex transmitter described, the sawtooth generator 10 produces a control wave for a plurality of similar channel circuits whose combined output is taken from a common differentiating circuit 23, 24 to an amplifier 13 and thence modulates a radio transmitter 11, 12. In the circuit of channel 1, a biassed diode 14 becomes conducting at a predetermined point of the applied saw-tooth wave, to pass the latter to the grid of pentode 16. At another predetermined point of the saw-tooth wave, the shunt diode 15 becomes conductive to prevent further rise in potential of the pentode grid. At a time after the first incidence of the saw-tooth voltage determined by the modulating voltage applied to its cathode, the valve 16 is arranged to pass rapidly from cut-off to anode current saturation, at which it remains until the saw-tooth fly-back occurs. The rectangular negative-going voltage pulse thus produced at the anode of 16 therefore has a time-modulated leading edge which produces a short time-modulated pulse from circuit 23, 24 for the radio transmitter. The corresponding diodes in the other channels are so biassed that different portions of the control wave are effective for pulse production and the channel pulse trains are thus all of the same recurrence frequency, but interlaced in time. Specifications 582,199 and 584,729 are referred to.
GB13540/45A 1944-07-01 1945-11-22 Multi-channel communication system Expired GB601931A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US543144A US2420374A (en) 1944-07-01 1944-07-01 Pulse multiplex transmission system

Publications (1)

Publication Number Publication Date
GB601931A true GB601931A (en) 1948-05-14

Family

ID=24166766

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13540/45A Expired GB601931A (en) 1944-07-01 1945-11-22 Multi-channel communication system

Country Status (2)

Country Link
US (1) US2420374A (en)
GB (1) GB601931A (en)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL133836C (en) * 1944-05-02
US2629840A (en) * 1945-06-23 1953-02-24 Herbert G Weiss Voltage control system
GB621479A (en) * 1945-10-12 1949-04-11 Dennis Illingworth Lawson Improvements in or relating to television systems
GB642097A (en) * 1945-10-25 1950-08-30 Sadir Carpentier Improvements in or relating to signal transmission systems
US2697783A (en) * 1946-02-13 1954-12-21 Robert C Miedke Signal generator
US2481516A (en) * 1946-03-22 1949-09-13 Lance R Jacobsen Mobile telephone system
FR959009A (en) * 1946-07-08 1950-03-23
US2884523A (en) * 1946-11-19 1959-04-28 Sperry Rand Corp Decoder circuit for teledata system
US2536654A (en) * 1947-01-04 1951-01-02 Rca Corp Pulse multiplex transmission system
US2570010A (en) * 1947-03-05 1951-10-02 Hartford Nat Bank & Trust Co Multiplex transceiving arrangement
US2548795A (en) * 1947-04-22 1951-04-10 Rca Corp Pulse multiplex system
US2631194A (en) * 1947-07-22 1953-03-10 Int Standard Electric Corp Telecommunication system
BE487541A (en) * 1948-02-26
BE506691A (en) * 1948-03-06
FR975958A (en) * 1948-09-23 1951-03-12 Thomson Houston Comp Francaise Large excursion phase modulation
US2685644A (en) * 1949-03-22 1954-08-03 Products And Licensing Corp Generator of complex waveforms
NL164229B (en) * 1951-07-16 Krupp Ag Huettenwerke WITH RUBBER SUSPENSION WHEEL FOR RAIL VEHICLES.
NL85617C (en) * 1952-11-11
US2798153A (en) * 1953-02-19 1957-07-02 Vitro Corp Of America Switching circuitry
US2883530A (en) * 1954-09-30 1959-04-21 Bendix Aviat Corp Amplitude band selection circuit
US2763778A (en) * 1955-09-15 1956-09-18 Joseph P Gleason Delayed pulse generator
US2838690A (en) * 1955-12-23 1958-06-10 Sperry Rand Corp Push-push transistor circuits
US3067941A (en) * 1956-10-06 1962-12-11 Electricite De France Apparatus for measuring the product of at least two factors and in particular for counting the consumption of electrical energy
US2977585A (en) * 1957-01-25 1961-03-28 Collins Radio Co Iso-echo circuit
US3175526A (en) * 1961-02-27 1965-03-30 North American Aviation Inc Automatic altitude control system for a hydrofoil vessel
US3193769A (en) * 1961-03-06 1965-07-06 Jordan Controls Inc Signal frequency comparator and control apparatus
US3558924A (en) * 1967-10-23 1971-01-26 Gen Precision Systems Inc Master timing circuit for providing different time delays to different systems
US7450535B2 (en) * 2005-12-01 2008-11-11 Rambus Inc. Pulsed signaling multiplexer

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB369304A (en) * 1931-01-03 1932-03-24 Kolster Radio Corp Improvements relating to electrical circuits
US2058686A (en) * 1932-10-25 1936-10-27 Radio Res Lab Inc Wave signaling method and apparatus
BE433923A (en) * 1938-04-23
US2213941A (en) * 1938-07-26 1940-09-03 Bell Telephone Labor Inc Multiplex signaling by phase discrimination
US2263369A (en) * 1939-02-03 1941-11-18 Hartford Nat Bank & Trust Co Multiplex telephony system
US2282046A (en) * 1939-09-01 1942-05-05 Rca Corp Multiplex signaling system

Also Published As

Publication number Publication date
US2420374A (en) 1947-05-13

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