GB496872A - Improvements in or relating to thermionic valve amplifiers - Google Patents

Improvements in or relating to thermionic valve amplifiers

Info

Publication number
GB496872A
GB496872A GB6685/37A GB668537A GB496872A GB 496872 A GB496872 A GB 496872A GB 6685/37 A GB6685/37 A GB 6685/37A GB 668537 A GB668537 A GB 668537A GB 496872 A GB496872 A GB 496872A
Authority
GB
United Kingdom
Prior art keywords
resistance
grid
cathode
earth
cable
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
GB6685/37A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB6685/37A priority Critical patent/GB496872A/en
Priority to US193836A priority patent/US2246331A/en
Publication of GB496872A publication Critical patent/GB496872A/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
    • H03F3/50—Amplifiers in which input is applied to, or output is derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower
    • H03F3/52—Amplifiers in which input is applied to, or output is derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower with tubes only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H03F1/36—Negative-feedback-circuit arrangements with or without positive feedback in discharge-tube amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

496,872. Valve amplifying circuits. WHITE, E. L. C., and HARDWICK, J. March 6, 1937, No. 6685. [Class 40 (v)] In a single-stage amplifier designed to produce no reversal of phase, particularly for television signals, the signals are applied across a resistance 6 which is large compared with the reciprocal of the mutual conductance of the valve, the resistance being connected in series in the anode circuit and between the cathode and grid. The grid is connected effectively to earth, e.g. through a bias battery 4, and the output is taken from an impedance 16 in the anode circuit. The input impedance is low and is matched to the source, if necessary, by adding resistance. A battery 7 opposes the voltage drop in resistance 6 so that normally there is no difference of potential between input terminals 1, 2. In a modification, Fig. 2, the grid is connected to earth through a condenser 11, and a resistance 12 provides a direct-current path between grid and cathode, resistance 14 providing the grid bias. Condensers 10, 13 are connected as shown and an inductance 17 and resistance 18 are connected in series across the input terminals to maintain the input impedance constant. The invention may be applied to amplifiers joined by a short length of cable, the two valves at the ends of the cable being fed from a common high-tension source and operating in push-pull. Specification 482,740 is referred to.
GB6685/37A 1937-03-06 1937-03-06 Improvements in or relating to thermionic valve amplifiers Expired GB496872A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB6685/37A GB496872A (en) 1937-03-06 1937-03-06 Improvements in or relating to thermionic valve amplifiers
US193836A US2246331A (en) 1937-03-06 1938-03-04 Thermionic valve amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6685/37A GB496872A (en) 1937-03-06 1937-03-06 Improvements in or relating to thermionic valve amplifiers

Publications (1)

Publication Number Publication Date
GB496872A true GB496872A (en) 1938-12-06

Family

ID=9818928

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6685/37A Expired GB496872A (en) 1937-03-06 1937-03-06 Improvements in or relating to thermionic valve amplifiers

Country Status (2)

Country Link
US (1) US2246331A (en)
GB (1) GB496872A (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2435331A (en) * 1943-10-04 1948-02-03 Nasa Vacuum tube amplifier
US2668240A (en) * 1943-11-24 1954-02-02 Jr George A Brettell Noninverting oscillator
US2476900A (en) * 1945-04-30 1949-07-19 Farnsworth Res Corp Variable gain amplifier
US2525698A (en) * 1945-05-11 1950-10-10 Hazeltine Research Inc Compensated voltage regulator
US2586230A (en) * 1945-07-20 1952-02-19 Cornell Dubilier Electric Inverter amplifier and automatic limiter
US2497075A (en) * 1946-03-12 1950-02-14 William F Ebert Voice input control system
US2613285A (en) * 1946-08-16 1952-10-07 Farnsworth Res Corp Balanced input high-frequency amplifier
US2500141A (en) * 1946-11-09 1950-03-07 Operadio Mfg Company Intercommunication system
US2698898A (en) * 1948-03-25 1955-01-04 Marconi Wireless Telegraph Co Amplifier circuit arrangement
US2505367A (en) * 1948-05-21 1950-04-25 Rca Corp Television receiver brightness and contrast control
NL77693C (en) * 1948-05-21
US2708687A (en) * 1949-05-10 1955-05-17 Motorola Inc Combined direct current reinserter and synchronizing pulse separator
US2685673A (en) * 1949-07-28 1954-08-03 Rca Corp High frequency test probe
US2813156A (en) * 1953-11-30 1957-11-12 Hoffman Electronics Corp Variable gain amplifier
US2995667A (en) * 1957-12-23 1961-08-08 Ibm Transmission line driver
US3271691A (en) * 1961-05-08 1966-09-06 Gen Electric Radiation monitor circuit including amplifier

Also Published As

Publication number Publication date
US2246331A (en) 1941-06-17

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