GB519846A - Improvements in and relating to thermionic amplifying systems - Google Patents

Improvements in and relating to thermionic amplifying systems

Info

Publication number
GB519846A
GB519846A GB2868538A GB2868538A GB519846A GB 519846 A GB519846 A GB 519846A GB 2868538 A GB2868538 A GB 2868538A GB 2868538 A GB2868538 A GB 2868538A GB 519846 A GB519846 A GB 519846A
Authority
GB
United Kingdom
Prior art keywords
volume
amplifier
compressor
input
predominates
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
GB2868538A
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.)
REDIFFUSION Ltd
Original Assignee
REDIFFUSION 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 REDIFFUSION Ltd filed Critical REDIFFUSION Ltd
Priority to GB2868538A priority Critical patent/GB519846A/en
Publication of GB519846A publication Critical patent/GB519846A/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

  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

519,846. Transmission systems. REDIFFUSION, Ltd., and ADORJAN, P. Oct. 3, 1938, No. 28685. [Class 40 (iv)] [Also in Group XL] To increase the efficiency of an audiofrequency amplifier used for telephone work or for modulating a wireless transmitter, two parallel paths are provided between the input and output of the system, one path including a volume-compressing stage and the other a volume-expanding stage. As shown, the input current at 10 is fed from amplifier A1 in series with a volume-compressor VA1, C1 and amplifier A3, and also to an amplifier A2 in series with a volume-compressor VA,2, C2 and an amplifier A4, the two last stages feeding the output 11 in parallel. Alternatively, both A3 and A4 may be followed by a duplication of the stages between 10 and 11, Fig. 2 (not shown). The control devices may be combined to form a potentiometer arrangement with a tapping which is varied in accordance with signal volume. The branch containing the compressor predominates at low input-levels, whilst the branch with the expander predominates at high input-levels.
GB2868538A 1938-10-03 1938-10-03 Improvements in and relating to thermionic amplifying systems Expired GB519846A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2868538A GB519846A (en) 1938-10-03 1938-10-03 Improvements in and relating to thermionic amplifying systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2868538A GB519846A (en) 1938-10-03 1938-10-03 Improvements in and relating to thermionic amplifying systems

Publications (1)

Publication Number Publication Date
GB519846A true GB519846A (en) 1940-04-08

Family

ID=10279493

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2868538A Expired GB519846A (en) 1938-10-03 1938-10-03 Improvements in and relating to thermionic amplifying systems

Country Status (1)

Country Link
GB (1) GB519846A (en)

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