GB449386A - Improvements in or relating to automatic volume control systems - Google Patents

Improvements in or relating to automatic volume control systems

Info

Publication number
GB449386A
GB449386A GB30616/35A GB3061635A GB449386A GB 449386 A GB449386 A GB 449386A GB 30616/35 A GB30616/35 A GB 30616/35A GB 3061635 A GB3061635 A GB 3061635A GB 449386 A GB449386 A GB 449386A
Authority
GB
United Kingdom
Prior art keywords
volume control
automatic volume
voltage
attenuator
rectifying
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
GB30616/35A
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Publication of GB449386A publication Critical patent/GB449386A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers

Landscapes

  • Amplifiers (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

449,386. Automatic volume control. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE, 12, Hallesches Ufer, Berlin. Nov. 5, 1935, No. 30616. Convention date, Nov. 5, 1934. [Class 40 (iv)] In automatic volume control systems for gramophone recording the variable attenuation device which is controlled by a voltage obtained by rectifying the signals is in the form of a balanced bridge. This enables the voltage to be employed in an unsmoothed condition without introducing noise. The elimination of the smoothing circuits makes the device more quick acting. As shown, the device is connected in shunt to the transmission line and is balanced with the aid of a slider 9. In a modification, the attenuator is in series in one of the transmission lines. Initial bias is provided by battery 14. The control voltage is obtained by rectifying at 3 signals derived from the input or output side of the attenuator and an amplifier may be included in the control path before or after the rectifier. The rectifiers 6, 7 may be shunted by adjustable resistances and may be thermionic valves.
GB30616/35A 1934-11-05 1935-11-05 Improvements in or relating to automatic volume control systems Expired GB449386A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE449386X 1934-11-05

Publications (1)

Publication Number Publication Date
GB449386A true GB449386A (en) 1936-06-25

Family

ID=6538262

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30616/35A Expired GB449386A (en) 1934-11-05 1935-11-05 Improvements in or relating to automatic volume control systems

Country Status (3)

Country Link
US (1) US2098370A (en)
FR (1) FR797132A (en)
GB (1) GB449386A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2554905A (en) * 1946-06-01 1951-05-29 Seismograph Service Corp Seismic signal amplifier

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3287081A (en) * 1966-11-22 Arrangement xr c carrying out the method
US2517586A (en) * 1947-07-23 1950-08-08 Time Inc Signal compression circuit
US2529055A (en) * 1948-11-09 1950-11-07 Republic Flow Meters Co Voltage limiting means
US2713620A (en) * 1949-04-29 1955-07-19 Phillips Petroleum Co Automatic volume control system
US2777058A (en) * 1951-09-28 1957-01-08 Fairchild Camera Instr Co Video-signal tone-adjusting network
US2745022A (en) * 1954-01-05 1956-05-08 Snyder James Voltage regulator
US2836719A (en) * 1955-08-23 1958-05-27 California Research Corp Methods and apparatus for shifting seismic record timing pulses
US2808474A (en) * 1956-01-23 1957-10-01 Boeing Co Variable attenuation control circuits
US2952006A (en) * 1956-05-23 1960-09-06 Jersey Prod Res Co Attenuation of seismic signals
US2990477A (en) * 1956-08-07 1961-06-27 Thompson Ramo Wooldridge Inc Bridge gating circuit with floating bias source
US3025413A (en) * 1957-06-07 1962-03-13 Bell Telephone Labor Inc Automatic amplitude control and pulse shaping circuit
US3062967A (en) * 1957-11-12 1962-11-06 Honeywell Regulator Co High speed switching device for low level signals
US2993129A (en) * 1958-02-19 1961-07-18 Westinghouse Electric Corp Amplifier circuits
US3093802A (en) * 1959-02-25 1963-06-11 Gen Electric Controllable signal transmission network
US3213292A (en) * 1960-02-08 1965-10-19 Gen Electric Variable admittance switching device
NL265150A (en) * 1960-05-26
US3139587A (en) * 1960-10-17 1964-06-30 United Aircraft Corp Amplitude limiting circuit
US3193759A (en) * 1961-02-24 1965-07-06 Ibm Gain control means
US3159796A (en) * 1961-07-10 1964-12-01 Gen Dynamics Corp Direct current controlled bridge type attenuator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2554905A (en) * 1946-06-01 1951-05-29 Seismograph Service Corp Seismic signal amplifier

Also Published As

Publication number Publication date
US2098370A (en) 1937-11-09
FR797132A (en) 1936-04-21

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