GB1271641A - Improvements relating to electrical signal amplifiers - Google Patents

Improvements relating to electrical signal amplifiers

Info

Publication number
GB1271641A
GB1271641A GB26524/68A GB2652468A GB1271641A GB 1271641 A GB1271641 A GB 1271641A GB 26524/68 A GB26524/68 A GB 26524/68A GB 2652468 A GB2652468 A GB 2652468A GB 1271641 A GB1271641 A GB 1271641A
Authority
GB
United Kingdom
Prior art keywords
amplitude
amplifier
feedback
electrical signal
improvements relating
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
GB26524/68A
Inventor
David Godwin Talbert
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.)
EMI Ltd
Original Assignee
EMI 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 EMI Ltd filed Critical EMI Ltd
Priority to GB26524/68A priority Critical patent/GB1271641A/en
Publication of GB1271641A publication Critical patent/GB1271641A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/25—Arrangements for performing computing operations, e.g. operational amplifiers for discontinuous functions, e.g. backlash, dead zone, limiting absolute value or peak value
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/30—Input circuits therefor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
    • H03G11/002—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general without controlling loop

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Surgery (AREA)
  • Medical Informatics (AREA)
  • Theoretical Computer Science (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Mathematical Physics (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Physics & Mathematics (AREA)
  • Software Systems (AREA)
  • Computer Hardware Design (AREA)
  • Amplifiers (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)

Abstract

1,271,641. Amplifier circuits. EMI Ltd. 25 July, 1969 [4 June, 1968], No. 26524/68. Heading H3W. [Also in Division G1] An amplifier 1 has feedback which is insensitive to A.C. and small amplitude D.C. but sensitive to larger amplitude D.C. Such an arrangement can prevent blocking of the amplifier by charging of the input capacitor due to interfering signals. As shown the back-to-back rectifiers 9, 10 block low amplitude A.C. and D.C. feedback and the capacitor 12 by-passes higher amplitude A.C. from the feedback path. The circuit is particularly suitable for amplifying electrocardiogram or electroencephalogram signals in the presence of interference from diathermy or defillibration equipment.
GB26524/68A 1968-06-04 1968-06-04 Improvements relating to electrical signal amplifiers Expired GB1271641A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB26524/68A GB1271641A (en) 1968-06-04 1968-06-04 Improvements relating to electrical signal amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB26524/68A GB1271641A (en) 1968-06-04 1968-06-04 Improvements relating to electrical signal amplifiers

Publications (1)

Publication Number Publication Date
GB1271641A true GB1271641A (en) 1972-04-19

Family

ID=10244989

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26524/68A Expired GB1271641A (en) 1968-06-04 1968-06-04 Improvements relating to electrical signal amplifiers

Country Status (1)

Country Link
GB (1) GB1271641A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227385A (en) * 1988-11-24 1990-07-25 Motorola Inc Soft limiting microphone amplifier circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227385A (en) * 1988-11-24 1990-07-25 Motorola Inc Soft limiting microphone amplifier circuit

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