GB746886A - Amplifier of which the gain characteristics as a function of the frequency are variable as a function of time - Google Patents

Amplifier of which the gain characteristics as a function of the frequency are variable as a function of time

Info

Publication number
GB746886A
GB746886A GB358/54A GB35854A GB746886A GB 746886 A GB746886 A GB 746886A GB 358/54 A GB358/54 A GB 358/54A GB 35854 A GB35854 A GB 35854A GB 746886 A GB746886 A GB 746886A
Authority
GB
United Kingdom
Prior art keywords
valve
amplifier
function
jan
grid
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
GB358/54A
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.)
Alcatel Lucent SAS
Original Assignee
Compagnie Generale dElectricite SA
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 Compagnie Generale dElectricite SA filed Critical Compagnie Generale dElectricite SA
Publication of GB746886A publication Critical patent/GB746886A/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
    • H03G7/02—Volume compression or expansion in amplifiers having discharge tubes
    • H03G7/04—Volume compression or expansion in amplifiers having discharge tubes incorporating negative feedback

Landscapes

  • Amplifiers (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

746,886. Valve amplifying circuits; pulse echo testing systems. COMPAGNIE GENERALE D'ELECTRICITE. Jan. 6, 1954 [Jan. 8, 1953], No. 358/54. Classes 40 (6) and 40 (7). An amplifier for use in the study of echoes produced during the pulse testing of transmission lines comprises an amplifier valve 1 having a cathode negative feedback resistor 3 across which is connected the effective input capacitance of a valve 5 having a capacitor 12 connected between its anode and grid, means 8 being provided to cyclically vary the bias on a second grid of the valve whereby the gain and frequency response of the amplifier valve 1 is varied to correct for the distortion of the pulses. Two stages such as that shown may be arranged in push-pull and a high pass filter may be connected in the output circuit to remove the fundamental and harmonic frequency components of the waveform of the bias variation (Fig. 3, not shown).
GB358/54A 1953-01-08 1954-01-06 Amplifier of which the gain characteristics as a function of the frequency are variable as a function of time Expired GB746886A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR746886X 1953-01-08

Publications (1)

Publication Number Publication Date
GB746886A true GB746886A (en) 1956-03-21

Family

ID=9147615

Family Applications (1)

Application Number Title Priority Date Filing Date
GB358/54A Expired GB746886A (en) 1953-01-08 1954-01-06 Amplifier of which the gain characteristics as a function of the frequency are variable as a function of time

Country Status (1)

Country Link
GB (1) GB746886A (en)

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