GB490672A - Improvements in and relating to low frequency amplifiers and the like - Google Patents

Improvements in and relating to low frequency amplifiers and the like

Info

Publication number
GB490672A
GB490672A GB385637A GB385637A GB490672A GB 490672 A GB490672 A GB 490672A GB 385637 A GB385637 A GB 385637A GB 385637 A GB385637 A GB 385637A GB 490672 A GB490672 A GB 490672A
Authority
GB
United Kingdom
Prior art keywords
voltage
pye
resistances
load circuit
output
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
GB385637A
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.)
PYE RADIO Ltd
Original Assignee
PYE RADIO 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 PYE RADIO Ltd filed Critical PYE RADIO Ltd
Priority to GB385637A priority Critical patent/GB490672A/en
Publication of GB490672A publication Critical patent/GB490672A/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
    • H03G7/02—Volume compression or expansion in amplifiers having discharge tubes
    • H03G7/04—Volume compression or expansion in amplifiers having discharge tubes incorporating negative feedback

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

490,672. Valve amplifying circuits. PYE, Ltd., (formerly PYE RADIO, Ltd.), and CALLENDAR, M. V. Feb. 9, 1937, No. 3856. [Class 40 (v)] In a low-frequency amplifier, voltage feedback to the input is caused to vary with the output by feeding back the voltage from a potential divider which is connected across the output, and which includes an element having a non-linear voltage-resistance characteristic, such as an electric incandescent lamp. In the Figure voltage is fed back from one diagonal of a bridge, the arms comprising the three linear resistances R5, R6, R7, and the filament of an incandescent lamp L, the load circuit LS being taken from a split secondary. The resistance R6 may be a further lamp. In Fig. 1 (not shown) resistances R6, R7 are omitted, and the elements R5, L are connected across the load circuit LS. The system may be used either for volume expansion or compression and may be. applied to a public address amplifier. Reference has been directed by the Comptroller to Specification 479,485.
GB385637A 1937-02-09 1937-02-09 Improvements in and relating to low frequency amplifiers and the like Expired GB490672A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB385637A GB490672A (en) 1937-02-09 1937-02-09 Improvements in and relating to low frequency amplifiers and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB385637A GB490672A (en) 1937-02-09 1937-02-09 Improvements in and relating to low frequency amplifiers and the like

Publications (1)

Publication Number Publication Date
GB490672A true GB490672A (en) 1938-08-09

Family

ID=9766199

Family Applications (1)

Application Number Title Priority Date Filing Date
GB385637A Expired GB490672A (en) 1937-02-09 1937-02-09 Improvements in and relating to low frequency amplifiers and the like

Country Status (1)

Country Link
GB (1) GB490672A (en)

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