GB971074A - Improvements relating to low drift amplifiers - Google Patents

Improvements relating to low drift amplifiers

Info

Publication number
GB971074A
GB971074A GB5871/61A GB587161A GB971074A GB 971074 A GB971074 A GB 971074A GB 5871/61 A GB5871/61 A GB 5871/61A GB 587161 A GB587161 A GB 587161A GB 971074 A GB971074 A GB 971074A
Authority
GB
United Kingdom
Prior art keywords
amplifier
input
drift
free
terminals
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
GB5871/61A
Inventor
Peter John Price
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.)
Allard Way Holdings Ltd
Original Assignee
Elliott Brothers London 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 Elliott Brothers London Ltd filed Critical Elliott Brothers London Ltd
Priority to GB5871/61A priority Critical patent/GB971074A/en
Priority to FR853022A priority patent/FR1280427A/en
Priority to DEE20629A priority patent/DE1167390B/en
Publication of GB971074A publication Critical patent/GB971074A/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
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/303—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters using a switching device

Landscapes

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

Abstract

971,074. Amplifying circuits. ELLIOTT BROS (LONDON) Ltd. Feb. 10, 1961 [Feb. 18, 1960], No. 5871/60. Heading H3T. A low drift direct current amplifying arrangement comprises a direct current amplifier having balanced input terminals and preceded by a substantially drift free amplifier connected to one of the terminals, and means connected to the other terminal for by-passing the drift-free amplifier at higher frequencies, wherein the drift-free amplifier, oe one or more stages is constructed as an active integrator to provide a gain/frequency characteristic which falls with rising frequency. In Fig. 2 a substantially drift-free amplifier such as of the modulator, amplifier, demodulator type has a capacitor C 2 between its input and output terminals. The input 1 is fed directly to input of D.C. amplifier 4 through capacitor C 3 and also to amplifier 2 via input resistor R 2 , the output of amplifier 2 feeding the other terminal of the balanced input of amplifier 4. The amplifier 2 is preferably provided with some smoothing to limit noise fed to amplifier 4. The overall gain of the arrangement is high for so-called D.C. signals and falls to a lower constant level for higher frequencies, Fig. 3, the reference 6 indicating the response for Fig. 2. Both the amplifiers may be transistorized.
GB5871/61A 1960-02-18 1960-02-18 Improvements relating to low drift amplifiers Expired GB971074A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB5871/61A GB971074A (en) 1960-02-18 1960-02-18 Improvements relating to low drift amplifiers
FR853022A FR1280427A (en) 1960-02-18 1961-02-17 DC amplifier system
DEE20629A DE1167390B (en) 1960-02-18 1961-02-18 A DC amplifier arrangement with little zero point drift

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5871/61A GB971074A (en) 1960-02-18 1960-02-18 Improvements relating to low drift amplifiers

Publications (1)

Publication Number Publication Date
GB971074A true GB971074A (en) 1964-09-30

Family

ID=9804171

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5871/61A Expired GB971074A (en) 1960-02-18 1960-02-18 Improvements relating to low drift amplifiers

Country Status (3)

Country Link
DE (1) DE1167390B (en)
FR (1) FR1280427A (en)
GB (1) GB971074A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3577090A (en) * 1969-08-25 1971-05-04 Shell Oil Co Fast settling, stable amplifier circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3577090A (en) * 1969-08-25 1971-05-04 Shell Oil Co Fast settling, stable amplifier circuit

Also Published As

Publication number Publication date
DE1167390B (en) 1964-04-09
FR1280427A (en) 1961-12-29

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