GB601931A - Multi-channel communication system - Google Patents
Multi-channel communication systemInfo
- 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
Links
- 230000011664 signaling Effects 0.000 abstract 1
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE468180A (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 |
BE511985A (en) * | 1951-07-16 | |||
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)
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 |
-
1944
- 1944-07-01 US US543144A patent/US2420374A/en not_active Expired - Lifetime
-
1945
- 1945-11-22 GB GB13540/45A patent/GB601931A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2420374A (en) | 1947-05-13 |
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