GB520549A - Improvements in or relating to thermionic amplifiers - Google Patents

Improvements in or relating to thermionic amplifiers

Info

Publication number
GB520549A
GB520549A GB3085238A GB3085238A GB520549A GB 520549 A GB520549 A GB 520549A GB 3085238 A GB3085238 A GB 3085238A GB 3085238 A GB3085238 A GB 3085238A GB 520549 A GB520549 A GB 520549A
Authority
GB
United Kingdom
Prior art keywords
variable
feedback
amplifier
change
valve
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
GB3085238A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB3085238A priority Critical patent/GB520549A/en
Publication of GB520549A publication Critical patent/GB520549A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/02—Manually-operated control
    • H03G3/04—Manually-operated control in untuned amplifiers
    • H03G3/06—Manually-operated control in untuned amplifiers having discharge tubes
    • H03G3/08—Manually-operated control in untuned amplifiers having discharge tubes incorporating negative feedback

Landscapes

  • Amplifiers (AREA)

Abstract

520,549. Valve amplifying circuits. STANDARD TELEPHONES & CABLES, Ltd., and ROCHE, A. H. Oct. 25, 1938, No. 30852. [Class 40 (v)] In a negative feedback amplifier a variable element in the feedback path operates to change the gain of a variable mu valve in the forward path of the amplifier. The Figure shows an amplifier including a variable mu valve V1 with the feedback applied to a variable resistance Rf in the cathode circuit. The arrangement may be such that the change in the feedback is equal and opposite to the change in the amplifier gain without feedback. The variable cathode impedance may include a reactive element so that the gain varies with frequency.
GB3085238A 1938-10-25 1938-10-25 Improvements in or relating to thermionic amplifiers Expired GB520549A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3085238A GB520549A (en) 1938-10-25 1938-10-25 Improvements in or relating to thermionic amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3085238A GB520549A (en) 1938-10-25 1938-10-25 Improvements in or relating to thermionic amplifiers

Publications (1)

Publication Number Publication Date
GB520549A true GB520549A (en) 1940-04-26

Family

ID=10314137

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3085238A Expired GB520549A (en) 1938-10-25 1938-10-25 Improvements in or relating to thermionic amplifiers

Country Status (1)

Country Link
GB (1) GB520549A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE962974C (en) * 1950-12-06 1957-05-02 Emi Ltd Nonlinear electrical circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE962974C (en) * 1950-12-06 1957-05-02 Emi Ltd Nonlinear electrical circuit

Similar Documents

Publication Publication Date Title
GB672169A (en) Improvements in or relating to electric wave amplifiers
GB515158A (en) Improvements in and relating to thermionic valve amplifiers
GB590443A (en) Thermionic amplifier for coupling to balanced output circuits
GB520549A (en) Improvements in or relating to thermionic amplifiers
GB653548A (en) Improvements in and relating to feedback arrangements in symmetrical cathode follower circuits
GB672373A (en) Improvements in or relating to thermionic valve circuit arrangements
GB516697A (en) Improvements in or relating to wave amplifying systems
GB702359A (en) Improvements relating to non-linear electrical circuits
GB584475A (en) Improvements in or relating to electrical amplifiers
GB484423A (en) Improvements in electric amplifiers employing thermionic or like valves
GB474133A (en) Improvements in thermionic amplifiers
GB490656A (en) Improvements in broad band amplifiers
GB664341A (en) Improvements in or relating to electronic discharge-tube amplifiers
GB786706A (en) Improvements in or relating to push-pull amplifiers
GB581074A (en) Improvements in wide frequency band thermionic valve amplifiers
GB716543A (en) Improvements in or relating to thermionic valve amplifiers
GB672218A (en) Improved electronic valve amplifiers
GB465118A (en) Improvements in and relating to amplifying circuits suitable in connection with television
GB440612A (en) Improvements in or relating to electron discharge device amplifiers
GB453246A (en) Improvements in thermionic valve amplifiers
GB716555A (en) Improvements in or relating to thermionic valve amplifiers
GB684963A (en) Improvements in or relating to thermionic valve circuit arrangements
GB683319A (en) Improvements in or relating to thermionic valve amplifiers
GB506765A (en) Improvements in or relating to amplifiers for electrical signalling systems
GB846344A (en) A thermionic-valve audio-frequency power amplifier