GB865467A - Improvements in or relating to methods of testing electronic amplifiers - Google Patents

Improvements in or relating to methods of testing electronic amplifiers

Info

Publication number
GB865467A
GB865467A GB738858A GB738858A GB865467A GB 865467 A GB865467 A GB 865467A GB 738858 A GB738858 A GB 738858A GB 738858 A GB738858 A GB 738858A GB 865467 A GB865467 A GB 865467A
Authority
GB
United Kingdom
Prior art keywords
amplifier
output
voltage
input
oscilloscope
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
GB738858A
Inventor
Gerald Hamilton Askew
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.)
Bush and Rank Cintel Ltd
Original Assignee
Bush and Rank Cintel Ltd
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 Bush and Rank Cintel Ltd filed Critical Bush and Rank Cintel Ltd
Priority to GB738858A priority Critical patent/GB865467A/en
Publication of GB865467A publication Critical patent/GB865467A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/28—Measuring attenuation, gain, phase shift or derived characteristics of electric four pole networks, i.e. two-port networks; Measuring transient response
    • G01R27/30—Measuring attenuation, gain, phase shift or derived characteristics of electric four pole networks, i.e. two-port networks; Measuring transient response with provision for recording characteristics, e.g. by plotting Nyquist diagram

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Tests Of Electronic Circuits (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

865,467. Amplifier characteristics measuring. BUSH & RANK CINTEL Ltd. March 9, 1959 [March 7, 1958], No. 7388/58. Class 37. The input-output transfer characteristic of an amplifier 3 is tested by applying an exponentially time varying voltage cyclically to the input of the amplifier 3 the output voltage of which is applied to the input of a logarithmic amplifier 5 so that deflection plates 9 of a cathode-ray oscilloscope 10 deflect the electron beam according to the logarithm of the output of amplifier 3, whilst deflection plates 11 deflect the beam according to a linear time-base generated by circuit 12 in synchronism with the exponential voltage. Generator 1 which produces the cyclic exponential voltage, and circuit 12 are controlled by signals applied to terminal 2. A linear amplifier 8 may be included between amplifier 5 and oscilloscope 10. In operation, switch 4 is set to select the output of generator 1 and switch 6 is set to connect amplifier 5 directly to amplifier 8. The oscilloscope trace should then be a straight line, preferably sloping at 45 degrees. The output of amplifier 3 is then selected by switch 4, the oscilloscope displaying the transfer characteristic plotted in logarithmic co-ordinates. Assuming the cyclic voltage x = e<SP>-kt</SP>, where k is a constant, and amplifier 3 has an output y = x<SP>γ</SP>, that is y =e<SP>-γkt</SP>, the slope of the above display at any point is y. By including a differentiating circuit 7 between amplifiers 5 and 8, a plot of y versus the logarithm of the input voltage is obtained. Specifications 843,828 and 865,466 are referred to.
GB738858A 1958-03-07 1958-03-07 Improvements in or relating to methods of testing electronic amplifiers Expired GB865467A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB738858A GB865467A (en) 1958-03-07 1958-03-07 Improvements in or relating to methods of testing electronic amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB738858A GB865467A (en) 1958-03-07 1958-03-07 Improvements in or relating to methods of testing electronic amplifiers

Publications (1)

Publication Number Publication Date
GB865467A true GB865467A (en) 1961-04-19

Family

ID=9832167

Family Applications (1)

Application Number Title Priority Date Filing Date
GB738858A Expired GB865467A (en) 1958-03-07 1958-03-07 Improvements in or relating to methods of testing electronic amplifiers

Country Status (1)

Country Link
GB (1) GB865467A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2217854A (en) * 1988-04-26 1989-11-01 Plessey Co Plc Testing logarithmic amplifiers
US5454162A (en) * 1991-04-29 1995-10-03 Siemens Aktiengesellschaft Method of making electrical conductor with a longitudinal groove and slots perpendicular thereto

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2217854A (en) * 1988-04-26 1989-11-01 Plessey Co Plc Testing logarithmic amplifiers
GB2217854B (en) * 1988-04-26 1992-10-07 Plessey Co Plc Method of testing logarithmic amplifiers
US5454162A (en) * 1991-04-29 1995-10-03 Siemens Aktiengesellschaft Method of making electrical conductor with a longitudinal groove and slots perpendicular thereto

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