GB558923A - Improvements in or relating to thermionic valve amplifiers - Google Patents

Improvements in or relating to thermionic valve amplifiers

Info

Publication number
GB558923A
GB558923A GB10293/42A GB1029342A GB558923A GB 558923 A GB558923 A GB 558923A GB 10293/42 A GB10293/42 A GB 10293/42A GB 1029342 A GB1029342 A GB 1029342A GB 558923 A GB558923 A GB 558923A
Authority
GB
United Kingdom
Prior art keywords
coupling
thermistor
parallel
resistance
phase changes
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
GB10293/42A
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 GB10293/42A priority Critical patent/GB558923A/en
Priority to US491769A priority patent/US2431307A/en
Publication of GB558923A publication Critical patent/GB558923A/en
Priority to FR932666D priority patent/FR932666A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/34—Dc amplifiers in which all stages are dc-coupled
    • H03F3/36—Dc amplifiers in which all stages are dc-coupled with tubes only
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/04—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having negative temperature coefficient

Abstract

558,923. Non-contact-making relays. STANDARD TELEPHONES & CABLES, Ltd., CHATTERJEA, P. K., and SCULLY, C. T. July 23, 1942, No. 10293. [Class 40 (iv)] [Also in Group XL] An inter-valve coupling for an amplifier adapted to amplify direct current comprises a thermistor, or thermally-sensitive resistance element, of the indirectly heated type with the resistance element R1 connected to the control grid of the second stage and the heating coil r1 connected in the anode circuit of the preceding stage. In a modification, two thermistors T1, T2 are arranged in cascade or with the resistance elements connected in parallel and the heating coils in series or parallel to increase the voltage gain. When the amplifier is for a relatively wide band of frequencies an additional coupling A, Fig. 4, may be provided for the higher frequencies. This coupling may be of the resistance-capacity, transformer or filter type and may include amplifying stages. The amplitude and phase changes produced by the additional coupling A and the thermistor T2 may be chosen so that the gain and phase changes are substantially independent of frequency over a given range.
GB10293/42A 1942-07-23 1942-07-23 Improvements in or relating to thermionic valve amplifiers Expired GB558923A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB10293/42A GB558923A (en) 1942-07-23 1942-07-23 Improvements in or relating to thermionic valve amplifiers
US491769A US2431307A (en) 1942-07-23 1943-06-22 Thermionic valve amplifier
FR932666D FR932666A (en) 1942-07-23 1946-08-23 Improvements to low frequency amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB10293/42A GB558923A (en) 1942-07-23 1942-07-23 Improvements in or relating to thermionic valve amplifiers

Publications (1)

Publication Number Publication Date
GB558923A true GB558923A (en) 1944-01-27

Family

ID=9965184

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10293/42A Expired GB558923A (en) 1942-07-23 1942-07-23 Improvements in or relating to thermionic valve amplifiers

Country Status (3)

Country Link
US (1) US2431307A (en)
FR (1) FR932666A (en)
GB (1) GB558923A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2714635A (en) * 1944-08-07 1955-08-02 Otto H Schmitt Modulator-thermal demodulator system
US3051913A (en) * 1959-10-12 1962-08-28 Gen Dynamics Corp Automatic gain control amplifier circuitry

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2017192A (en) * 1932-10-29 1935-10-15 Rca Corp Electrical network
US2204962A (en) * 1937-09-14 1940-06-18 Telefunken Gmbh Automatic volume control
US2271208A (en) * 1939-08-07 1942-01-27 Gen Electric Resistance device

Also Published As

Publication number Publication date
US2431307A (en) 1947-11-25
FR932666A (en) 1948-03-30

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