GB352772A - Improvements in or relating to amplifiers for reproducing sound - Google Patents

Improvements in or relating to amplifiers for reproducing sound

Info

Publication number
GB352772A
GB352772A GB24027/30A GB2402730A GB352772A GB 352772 A GB352772 A GB 352772A GB 24027/30 A GB24027/30 A GB 24027/30A GB 2402730 A GB2402730 A GB 2402730A GB 352772 A GB352772 A GB 352772A
Authority
GB
United Kingdom
Prior art keywords
resistance
impedance
ear
amplifiers
relating
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
GB24027/30A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB352772A publication Critical patent/GB352772A/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
    • H03G9/04—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having discharge tubes
    • H03G9/06—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having discharge tubes for gain control and tone control

Landscapes

  • Amplifiers (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)

Abstract

352,772. Valve amplifying circuits. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. Aug. 11, 1930, No. 24027. Convention date, Sept. 25, 1929. [Class 40 (v).] A method of volume control designed to preserve a correct balance of tonality, as perceived by the ear, over a wide range of absolute sound intensity, comprises an impedance network 6, 7, C, L, which may be shunted across the primary or secondary windings of the intervalve transformer 2. The voltage is applied to and taken off from the impedance between one of the ends of the resistance and a variable tapping 9 on the resistance 6, 7, the elements C, L preferably being made resonant to the band of frequencies to which the human ear is most sensitive. The inductance L and capacity C may be replaced by a number of similar resonant combinations arranged in parallel across the potentiometer 6, 7.
GB24027/30A 1929-09-25 1930-08-11 Improvements in or relating to amplifiers for reproducing sound Expired GB352772A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL352772X 1929-09-25

Publications (1)

Publication Number Publication Date
GB352772A true GB352772A (en) 1931-07-16

Family

ID=19785101

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24027/30A Expired GB352772A (en) 1929-09-25 1930-08-11 Improvements in or relating to amplifiers for reproducing sound

Country Status (1)

Country Link
GB (1) GB352772A (en)

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