GB653537A - Improvements relating to fading circuits for controlling the transference of electrical signals - Google Patents

Improvements relating to fading circuits for controlling the transference of electrical signals

Info

Publication number
GB653537A
GB653537A GB1366148A GB1366148A GB653537A GB 653537 A GB653537 A GB 653537A GB 1366148 A GB1366148 A GB 1366148A GB 1366148 A GB1366148 A GB 1366148A GB 653537 A GB653537 A GB 653537A
Authority
GB
United Kingdom
Prior art keywords
resistance
potential
transference
controlling
electrical signals
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
GB1366148A
Inventor
Frank Runcorn Trott
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB1366148A priority Critical patent/GB653537A/en
Publication of GB653537A publication Critical patent/GB653537A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers

Landscapes

  • Rectifiers (AREA)

Abstract

653,537. Television. ELECTRIC & MUSICAL INDUSTRIES, Ltd. May 20, 1948, No. 13661. [Class 40 (iii)] [Also in Group XL (c)] In a circuit whereby a bias or like control voltage may be varied linearly and at a predetermined rate between predetermined limits, comprising a condenser 5 which can be charged over resistance 7 from alternative sources 11, 12, the rate at which the potential changes may be altered by varying the resistance by means of a switch 15; alternatively the resistance 7 may be made continuously variable. The potential is limited in a positive direction by means of a biassed diode 9, a reversed diode 10 similarly determining the final potential in charging in a negative direction. The arrangement may be used for fading television pictures in and out by control of the amplifier gain. Reference has been directed by the Comptroller to Specifications 639,567 and 654,593.
GB1366148A 1948-05-20 1948-05-20 Improvements relating to fading circuits for controlling the transference of electrical signals Expired GB653537A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1366148A GB653537A (en) 1948-05-20 1948-05-20 Improvements relating to fading circuits for controlling the transference of electrical signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1366148A GB653537A (en) 1948-05-20 1948-05-20 Improvements relating to fading circuits for controlling the transference of electrical signals

Publications (1)

Publication Number Publication Date
GB653537A true GB653537A (en) 1951-05-16

Family

ID=10027100

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1366148A Expired GB653537A (en) 1948-05-20 1948-05-20 Improvements relating to fading circuits for controlling the transference of electrical signals

Country Status (1)

Country Link
GB (1) GB653537A (en)

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