GB1009981A - Improvements relating to feedback amplifiers - Google Patents

Improvements relating to feedback amplifiers

Info

Publication number
GB1009981A
GB1009981A GB2104761A GB2104761A GB1009981A GB 1009981 A GB1009981 A GB 1009981A GB 2104761 A GB2104761 A GB 2104761A GB 2104761 A GB2104761 A GB 2104761A GB 1009981 A GB1009981 A GB 1009981A
Authority
GB
United Kingdom
Prior art keywords
network
feed
control
feedback
june
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
GB2104761A
Inventor
Yat Wah Lam
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 GB2104761A priority Critical patent/GB1009981A/en
Publication of GB1009981A publication Critical patent/GB1009981A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H03G9/025—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers frequency-dependent volume compression or expansion, e.g. multiple-band systems

Landscapes

  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

1,009,981. Automatic volume control. ELECTRIC & MUSICAL INDUSTRIES Ltd. June 12, 1962 [June 10, 1961], No. 21047/61. Heading H4R. Automatic gain control is applied only at certain frequencies in an amplifier 1, by controlling the degree of feed-back over a frequency selective negative feed-back path 2, 3. The degree of feedback is controlled in accordance with the level of the frequency components it is desired to control, selected by network 5, which is similar to the network 2 in the feedback path. Alternatively, the feed-back control signal may be derived from between network 2 and amplifier 3.
GB2104761A 1961-06-10 1961-06-10 Improvements relating to feedback amplifiers Expired GB1009981A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2104761A GB1009981A (en) 1961-06-10 1961-06-10 Improvements relating to feedback amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2104761A GB1009981A (en) 1961-06-10 1961-06-10 Improvements relating to feedback amplifiers

Publications (1)

Publication Number Publication Date
GB1009981A true GB1009981A (en) 1965-11-17

Family

ID=10156290

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2104761A Expired GB1009981A (en) 1961-06-10 1961-06-10 Improvements relating to feedback amplifiers

Country Status (1)

Country Link
GB (1) GB1009981A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1907619B2 (en) * 1968-02-16 1973-03-22 Lkb Produkter Ab CONTROL DEVICE FOR CONTROLLING THE AMPLIFICATION LEVEL OF A COUNTER-COUPLED AMPLIFIER STAGE
FR2373851A1 (en) * 1976-12-07 1978-07-07 Saba Gmbh BLAST SUPPRESSOR CIRCUIT FOR RECORDER

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1907619B2 (en) * 1968-02-16 1973-03-22 Lkb Produkter Ab CONTROL DEVICE FOR CONTROLLING THE AMPLIFICATION LEVEL OF A COUNTER-COUPLED AMPLIFIER STAGE
FR2373851A1 (en) * 1976-12-07 1978-07-07 Saba Gmbh BLAST SUPPRESSOR CIRCUIT FOR RECORDER

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