GB291143A - Improvements in or relating to thermionic amplifiers and circuit arrangements therefor - Google Patents

Improvements in or relating to thermionic amplifiers and circuit arrangements therefor

Info

Publication number
GB291143A
GB291143A GB5173/27A GB517327A GB291143A GB 291143 A GB291143 A GB 291143A GB 5173/27 A GB5173/27 A GB 5173/27A GB 517327 A GB517327 A GB 517327A GB 291143 A GB291143 A GB 291143A
Authority
GB
United Kingdom
Prior art keywords
condenser
choke
valve
grid
filament
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
GB5173/27A
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
Publication of GB291143A publication Critical patent/GB291143A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/4446—IF amplifier circuits specially adapted for B&W TV
    • 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
    • H03F1/42—Modifications of amplifiers to extend the bandwidth
    • H03F1/48—Modifications of amplifiers to extend the bandwidth of aperiodic amplifiers
    • H03F1/50—Modifications of amplifiers to extend the bandwidth of aperiodic amplifiers with tubes only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/02—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with tubes only
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)

Abstract

291,143. Round, H. J. Feb. 23, 1927. Thermionic amplifiers and detectors. - An inductive reactance or choke is inserted between the plate of one valve and the grid of a following valve, in series with the coupling condenser of the resistance-capacity coupling; the object being to keep up the amplification of the higher voice frequencies. Fig. 1 shows a valve 1 coupled to a following valve by the usual plate resistance 5, coupling condenser 7, and grid leak 11. The choke 8 is inserted on one or other side of the condenser 7; and a condenser 13 (which may be shunted by a damping-resistance. 14) is connected across the grid and filament. At the resonance frequency of the choke in combination with the grid-filament capacity, amplification is increased, whilst beyond that frequency there is a comparatively sharp cut off, which may be adjusted to about five or six thousand cycles. The choke also tends to prevent radio frequency currents from passing from a detector into an audio-frequency amplifier. A condenser 15 may be employed to by-pass radio frequency currents between the plate and filament of the valve 1; and the provision of the choke counteracts the tendency for this condenser to reduce amplification of the higher voice frequencies.
GB5173/27A 1927-02-23 1927-02-23 Improvements in or relating to thermionic amplifiers and circuit arrangements therefor Expired GB291143A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1841383X 1927-02-23

Publications (1)

Publication Number Publication Date
GB291143A true GB291143A (en) 1928-05-23

Family

ID=26316229

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5173/27A Expired GB291143A (en) 1927-02-23 1927-02-23 Improvements in or relating to thermionic amplifiers and circuit arrangements therefor

Country Status (3)

Country Link
US (1) US1841383A (en)
FR (1) FR650079A (en)
GB (1) GB291143A (en)

Also Published As

Publication number Publication date
FR650079A (en) 1929-01-04
US1841383A (en) 1932-01-19

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