GB596052A - Pulse generating and/or modulating system using a gas-filled electron discharge tube - Google Patents

Pulse generating and/or modulating system using a gas-filled electron discharge tube

Info

Publication number
GB596052A
GB596052A GB18205/45A GB1820545A GB596052A GB 596052 A GB596052 A GB 596052A GB 18205/45 A GB18205/45 A GB 18205/45A GB 1820545 A GB1820545 A GB 1820545A GB 596052 A GB596052 A GB 596052A
Authority
GB
United Kingdom
Prior art keywords
conduction
capacitor
gas
resistor
pulse
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
GB18205/45A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables 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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB596052A publication Critical patent/GB596052A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/78—Generating a single train of pulses having a predetermined pattern, e.g. a predetermined number
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H03K7/06—Frequency or rate modulation, i.e. PFM or PRM
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/026—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse time characteristics modulation, e.g. width, position, interval

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)

Abstract

596,052. Pulse modulating circuits. STANDARD TELEPHONES & CABLES, Ltd. July 16, 1945, No. 18205. Convention date, July 17, 1944. [Class 40 (v)] A pulse generator comprises a gas-filled valve with a capacitor shunted by a resistor in the cathode circuit, the capacitor being charged during conduction through the valve to a level causing extinction, and then discharging through the resistor to initiate conduction again. Initially, gas-filled valve 3 in Fig. 1 conducts to charge capacitor 8 from battery source B as indicated in curve 17, Fig. 2a. Conduction continues until the cathode potential reaches level 21 when the anodecathode voltage becomes insufficient to maintain conduction. Capacitor 8 then discharges through resistor 7 until the cathode voltage falls to level 16 at which the grid bias initiates conduction again. An audio-modulation signal may be impressed on grid 4 from microphone 1 and amplifier 2 to cause the striking voltage 24 to vary sinusoidally without affecting the extinction voltage. Each time the tube strikes, a pulse appears at anode 9 with a sharp leading edge 26. The pulse train at the anode is fed through amplifier 12 and clipper 13 to produce uniform pulses 29 with leading edges modulated in time to correspond with the impressed audio signal. These pulses modulate an RF oscillator 14. Specification 454,471 is referred to.
GB18205/45A 1944-07-17 1945-07-16 Pulse generating and/or modulating system using a gas-filled electron discharge tube Expired GB596052A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US545260A US2441958A (en) 1944-07-17 1944-07-17 Communication system

Publications (1)

Publication Number Publication Date
GB596052A true GB596052A (en) 1947-12-24

Family

ID=24175509

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18205/45A Expired GB596052A (en) 1944-07-17 1945-07-16 Pulse generating and/or modulating system using a gas-filled electron discharge tube

Country Status (5)

Country Link
US (1) US2441958A (en)
BE (1) BE475385A (en)
ES (1) ES182268A1 (en)
FR (1) FR950767A (en)
GB (1) GB596052A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE482827A (en) * 1947-05-12

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1887237A (en) * 1929-05-31 1932-11-08 Rca Corp Signaling system
US2227596A (en) * 1938-03-31 1941-01-07 Rca Corp Signaling system
GB530378A (en) * 1939-06-05 1940-12-11 Philco Radio & Television Corp Improvements in and relating to synchronizing systems and methods
US2280707A (en) * 1940-05-31 1942-04-21 Rca Corp Apparatus for and method of frequency modulating
US2292100A (en) * 1940-08-30 1942-08-04 Rca Corp Square wave generator
US2329137A (en) * 1941-05-23 1943-09-07 Rca Corp Deflection generator

Also Published As

Publication number Publication date
ES182268A1 (en) 1948-04-01
BE475385A (en)
US2441958A (en) 1948-05-25
FR950767A (en) 1949-10-06

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