GB765238A - Improvements in or relating to devices for selecting and transforming time phase modulated pulse trains - Google Patents

Improvements in or relating to devices for selecting and transforming time phase modulated pulse trains

Info

Publication number
GB765238A
GB765238A GB37121/54A GB3712154A GB765238A GB 765238 A GB765238 A GB 765238A GB 37121/54 A GB37121/54 A GB 37121/54A GB 3712154 A GB3712154 A GB 3712154A GB 765238 A GB765238 A GB 765238A
Authority
GB
United Kingdom
Prior art keywords
pulse
gating
grid
pulses
condenser
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
GB37121/54A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB765238A publication Critical patent/GB765238A/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)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

765,238. Multiplex pulse signalling. TELEFONAKTIEBOLAGET L. M. ERICSSON. Dec. 22, 1954 [Dec. 23, 1953], No. 37121/54. Class 40(5) A circuit for selecting a particular channel of a multiplex time-phase modulated pulse train and producing a duration modulated pulse train consists of a triode -1 which is normally non-conducting (see below), incoming signal pulses being applied to the grid via condenser 6 and negative gating pulses being applied via transformer 8 to the cathode. The gating pulses are arranged so that the selected channel pulses fall within the gating period. The pressure of a gating pulse causes the valve to conduct. A positive pulse of the selected channel causes grid current to flow which charges condenser 6 negatively. The cessation of the channel pulse then causes the grid voltage to drop far enough to cut off the valve (despite the continuation of the gating pulse) and so terminate the duration modulated output pulse. With the end of the gating pulse, the grid/ cathode voltage falls further negative, and then rises slowly as condenser 6 discharges through resistor 4. The time constant of 4 and 6 is chosen so that the valve remains cut off until the next gate pulse.
GB37121/54A 1953-12-23 1954-12-22 Improvements in or relating to devices for selecting and transforming time phase modulated pulse trains Expired GB765238A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE765238X 1953-12-23

Publications (1)

Publication Number Publication Date
GB765238A true GB765238A (en) 1957-01-09

Family

ID=20329984

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37121/54A Expired GB765238A (en) 1953-12-23 1954-12-22 Improvements in or relating to devices for selecting and transforming time phase modulated pulse trains

Country Status (2)

Country Link
FR (1) FR1116389A (en)
GB (1) GB765238A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3004227A (en) * 1956-04-18 1961-10-10 Itt Pulse modulation converter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909659A (en) * 1957-09-03 1959-10-20 Raytheon Co Pulse shaping circuits

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3004227A (en) * 1956-04-18 1961-10-10 Itt Pulse modulation converter

Also Published As

Publication number Publication date
FR1116389A (en) 1956-05-07

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