CH275280A - Amplification device with automatic volume and contrast control. - Google Patents

Amplification device with automatic volume and contrast control.

Info

Publication number
CH275280A
CH275280A CH275280DA CH275280A CH 275280 A CH275280 A CH 275280A CH 275280D A CH275280D A CH 275280DA CH 275280 A CH275280 A CH 275280A
Authority
CH
Switzerland
Prior art keywords
amplification device
contrast control
automatic volume
automatic
volume
Prior art date
Application number
Other languages
French (fr)
Inventor
Limited Marconi S Wire Company
Original Assignee
Marconi Wireless Telegraph Co
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 Marconi Wireless Telegraph Co filed Critical Marconi Wireless Telegraph Co
Publication of CH275280A publication Critical patent/CH275280A/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/22—Automatic control in amplifiers having discharge tubes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/002—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
    • H04B1/64—Volume compression or expansion arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Circuits Of Receivers In General (AREA)
  • Amplifiers (AREA)
CH275280D 1947-04-18 1948-04-05 Amplification device with automatic volume and contrast control. CH275280A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB275280X 1947-04-18

Publications (1)

Publication Number Publication Date
CH275280A true CH275280A (en) 1951-05-15

Family

ID=10261048

Family Applications (1)

Application Number Title Priority Date Filing Date
CH275280D CH275280A (en) 1947-04-18 1948-04-05 Amplification device with automatic volume and contrast control.

Country Status (4)

Country Link
CH (1) CH275280A (en)
DE (1) DE846560C (en)
FR (1) FR964881A (en)
GB (1) GB640920A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1263099B (en) * 1961-11-15 1968-03-14 Thomson Houston Comp Francaise Gain control circuit

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2750451A (en) * 1951-03-13 1956-06-12 Motorola Inc Audio system
DE1048950B (en) * 1956-07-19 1959-01-22 Siemens Ag Message transmission system with an arrangement for noise suppression
US3058068A (en) * 1958-08-11 1962-10-09 Beckman Instruments Inc Clamping circuit for feedback amplifiers
US3398381A (en) * 1965-03-22 1968-08-20 Columbia Broadcasting Syst Inc Control circuit for restricting instantaneous peak levels of audio signals
JPS56134811A (en) * 1980-03-24 1981-10-21 Sony Corp Gain control circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1263099B (en) * 1961-11-15 1968-03-14 Thomson Houston Comp Francaise Gain control circuit

Also Published As

Publication number Publication date
DE846560C (en) 1952-08-14
GB640920A (en) 1950-08-02
FR964881A (en) 1950-08-26

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