GB610118A - Improvements in or relating to multi-vibrators and circuits utilising the same - Google Patents

Improvements in or relating to multi-vibrators and circuits utilising the same

Info

Publication number
GB610118A
GB610118A GB9371/46A GB937146A GB610118A GB 610118 A GB610118 A GB 610118A GB 9371/46 A GB9371/46 A GB 9371/46A GB 937146 A GB937146 A GB 937146A GB 610118 A GB610118 A GB 610118A
Authority
GB
United Kingdom
Prior art keywords
signal
grid
cathode
multivibrator
valves
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
GB9371/46A
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 GB610118A publication Critical patent/GB610118A/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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/04—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/04—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback
    • H03K3/05—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback using means other than a transformer for feedback
    • H03K3/06—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback using means other than a transformer for feedback using at least two tubes so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S84/00—Music
    • Y10S84/11—Frequency dividers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S84/00—Music
    • Y10S84/13—Gas discharge tube

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Electrotherapy Devices (AREA)

Abstract

610,118. Thermionic distributers. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. March 26, 1946, No. 9371. Convention date, Dec. 30, 1944. [Class 40 (iii)] [Also in Group XL (c)] In a multivibrator the condensers CH1, CH2 instead of being charged over a path which includes the grid to cathode impedance of valves 5 and 12 are charged over unilaterallyconductive devices, shown as diodes D2 and D4, thus enabling the grids of the valves to be given a negative bias and so to act as Class A amplifiers during their conducting period. Diodes D1 and D3 block the grid to cathode paths during the charging periods. Two oscillators 50, 60 of frequencies f1 and f2 are fed into the cathode circuits of valves 5 and 12 so that the signal voltage across the common load resistor 10 is switched from frequency f1 to f2 at a rate depending on the natural frequency of the multivibrator. Low-pass filters 18, 23 prevent signals amplified in one valve from being fed to the grid of the other valve, thus providing a signal suitable for testing purposes. In a modification, Fig. 5 (not shown), for multiplex signalling, signals from two separate channels are applied across the cathode resistors, the signal elements of the respective channels being time displaced a fraction of the time duration of a signal element; the time at which a valve starts to amplify is determined by applying synchronising pulses to its grid, these pulses recurring at a rate double the frequency of the signal elements and lagging in time by one-quarter of a signal element behind the signal elements of the channel it is designed to amplify. Thus the output of the multivibrator represents the centre portion of each signal element of each of the separate channels. A further modification, Fig. 6, (not shown), uses three separate multivibrators and enables four signal channels to be combined.
GB9371/46A 1944-12-30 1946-03-26 Improvements in or relating to multi-vibrators and circuits utilising the same Expired GB610118A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US570665A US2502687A (en) 1944-12-30 1944-12-30 Multivibrator and control of same

Publications (1)

Publication Number Publication Date
GB610118A true GB610118A (en) 1948-10-12

Family

ID=24280566

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9371/46A Expired GB610118A (en) 1944-12-30 1946-03-26 Improvements in or relating to multi-vibrators and circuits utilising the same

Country Status (2)

Country Link
US (1) US2502687A (en)
GB (1) GB610118A (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3013222A (en) * 1945-12-27 1961-12-12 Bell Telephone Labor Inc Signal translating system
US2637816A (en) * 1949-06-23 1953-05-05 Du Mont Allen B Lab Inc Square wave voltage calibrator
US2704787A (en) * 1949-12-01 1955-03-22 Stromberg Carlson Co Telephone trunk supervisory circuit
US2716161A (en) * 1951-11-26 1955-08-23 Rca Corp Band selecting amplifiers
USRE24096E (en) * 1952-06-13 1955-11-22 Electronic ringing current generator
US2757282A (en) * 1952-12-20 1956-07-31 Hughes Aircraft Co Multivibrator circuits
US2834880A (en) * 1953-04-06 1958-05-13 Ibm Pulse generator
US2824222A (en) * 1954-02-26 1958-02-18 Jr William M Furlow Digit storage circuit
US2883525A (en) * 1954-12-10 1959-04-21 Hughes Aircraft Co Flip-flop for generating voltagecouple signals
US2855511A (en) * 1955-01-03 1958-10-07 Jr Edward R Saunders Biased peaker strip energy control system for betatrons and synchrotrons
US3098158A (en) * 1955-06-06 1963-07-16 Thompson Ramo Wooldridge Inc Multivibrator circuits employing voltage break-down devices
US2916637A (en) * 1955-08-09 1959-12-08 Thompson Ramo Wooldridge Inc Multivibrator circuits with improved power-frequency capacity
US2990478A (en) * 1957-02-25 1961-06-27 Thompson Ramo Wooldridge Inc Anti-saturation circuits for transistor amplifiers
US3378624A (en) * 1964-06-25 1968-04-16 Allen Organ Company Inc Electrical musical instrument with tremolo
US3239779A (en) * 1965-01-11 1966-03-08 Northern Electric Co Free running multivibrator transistor circuit

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419292A (en) * 1947-04-22 System fob transmitting two
US2048081A (en) * 1933-04-29 1936-07-21 Alger S Riggs Communication system
US2086351A (en) * 1934-06-28 1937-07-06 Rca Corp Multiplex telegraph system
FR821506A (en) * 1936-05-12 1937-12-07 Telefunken Gmbh Improvements to relaxation oscillation generators
FR822498A (en) * 1936-06-03 1937-12-30 Telefunken Gmbh Improvements to relaxation oscillation generators
NL54411C (en) * 1936-07-27
US2262838A (en) * 1937-11-19 1941-11-18 Int Standard Electric Corp Electric signaling system
US2189317A (en) * 1938-08-31 1940-02-06 Rca Corp Diversity antenna system
NL87334C (en) * 1938-10-03
US2300999A (en) * 1940-10-30 1942-11-03 Westinghouse Electric & Mfg Co Electromagnetic inspection system
NL60174C (en) * 1940-12-07
US2380520A (en) * 1942-04-24 1945-07-31 Shell Dev Borehole indicating apparatus

Also Published As

Publication number Publication date
US2502687A (en) 1950-04-04

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