GB369552A - Improvements in and relating to systems employing electron discharge devices - Google Patents

Improvements in and relating to systems employing electron discharge devices

Info

Publication number
GB369552A
GB369552A GB28158/30A GB2815830A GB369552A GB 369552 A GB369552 A GB 369552A GB 28158/30 A GB28158/30 A GB 28158/30A GB 2815830 A GB2815830 A GB 2815830A GB 369552 A GB369552 A GB 369552A
Authority
GB
United Kingdom
Prior art keywords
amplifier
valve
load
current
sept
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
GB28158/30A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB369552A publication Critical patent/GB369552A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/04—Modulator circuits; Transmitter circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Rectifiers (AREA)
  • Particle Accelerators (AREA)

Abstract

369,552. Valve modulating circuits. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Kaar, I. J. ; 10, Troy Road, Schenectady, New York, U.S.A.) Sept. 20, 1930, No. 28158. Convention date, Sept. 20, 1929. Void [Published under Sect. 91 of the Acts]. [Class 40 (v).] An auxiliary valve 17 is arranged to take an increased load from the supply rectifier 8, 9, 10 when the load taken by the power amplifier 3 decreases, during non-keying periods, and vice versa, thus maintaining a steady voltage on the plate of the amplifier. Normally the impedance of the amplifier 3 is infinite and the total load is shared between the shunt resistance 13 and the plate-filament path of the auxiliary valve 17. When the signalling key 7 is down, the current through the amplifier increases ; but the resulting grid current passing through the resistance 18 increases the negative bias on the grid of the valve 17, and so reduces the current through that valve to an extent which counterbalances the increased current taken by the amplifier. The shift of the load from the amplifier 3 to the compensator 17 occurs without any time-lag, and therefore serves to prevent any distortion due to anode-voltage fluctuations in high-speed keying.
GB28158/30A 1929-09-20 1930-09-20 Improvements in and relating to systems employing electron discharge devices Expired GB369552A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US394074A US1908254A (en) 1929-09-20 1929-09-20 Signal system

Publications (1)

Publication Number Publication Date
GB369552A true GB369552A (en) 1932-03-24

Family

ID=23557444

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28158/30A Expired GB369552A (en) 1929-09-20 1930-09-20 Improvements in and relating to systems employing electron discharge devices

Country Status (2)

Country Link
US (1) US1908254A (en)
GB (1) GB369552A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2542182A (en) * 1945-10-25 1951-02-20 Bell Telephone Labor Inc Combined radar and communication system

Also Published As

Publication number Publication date
US1908254A (en) 1933-05-09

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