GB467332A - Improvements in or relating to high frequency electric signalling systems - Google Patents

Improvements in or relating to high frequency electric signalling systems

Info

Publication number
GB467332A
GB467332A GB2514035A GB2514035A GB467332A GB 467332 A GB467332 A GB 467332A GB 2514035 A GB2514035 A GB 2514035A GB 2514035 A GB2514035 A GB 2514035A GB 467332 A GB467332 A GB 467332A
Authority
GB
United Kingdom
Prior art keywords
frequency
relating
high frequency
tuned
class
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
GB2514035A
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.)
Ferranti International PLC
Original Assignee
Ferranti 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 Ferranti PLC filed Critical Ferranti PLC
Priority to GB2514035A priority Critical patent/GB467332A/en
Publication of GB467332A publication Critical patent/GB467332A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

467,332. Valve amplifying circuits. FERRANTI, Ltd., TAYLOR, M. K., and ATKINSON, S. Sept. 10, 1935, No. 25140. [Class 40 (v)] The invention is concerned with reduction of phase-distortion in carrier frequency amplifiers for television or code-telegraphy. The distortion due to non-proportional variation of the phase difference of components of a modulated carrier frequency wave together with that due to the phase angle at zero modulation frequency being other than zero or a multiple of # is reduced by employing a double beat heterodyne system comprising two oscillator and mixing stages 28, 22; 25, 29, the IF amplifier 23, 24 following the first stage being tuned to say the sum frequency while the IF amplifiers 26, 27 following the second mixing stage is tuned to the difference frequency or vice versa. British Specifications 279,808, [Class 40 (v)], 346,422, and U.S.A. Specification 1,830,173, are referred to.
GB2514035A 1935-09-10 1935-09-10 Improvements in or relating to high frequency electric signalling systems Expired GB467332A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2514035A GB467332A (en) 1935-09-10 1935-09-10 Improvements in or relating to high frequency electric signalling systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2514035A GB467332A (en) 1935-09-10 1935-09-10 Improvements in or relating to high frequency electric signalling systems

Publications (1)

Publication Number Publication Date
GB467332A true GB467332A (en) 1937-06-10

Family

ID=10222863

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2514035A Expired GB467332A (en) 1935-09-10 1935-09-10 Improvements in or relating to high frequency electric signalling systems

Country Status (1)

Country Link
GB (1) GB467332A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3090009A (en) * 1958-12-30 1963-05-14 Bell Telephone Labor Inc Noise figure improvement in radio receivers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3090009A (en) * 1958-12-30 1963-05-14 Bell Telephone Labor Inc Noise figure improvement in radio receivers

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