BE714939A - - Google Patents

Info

Publication number
BE714939A
BE714939A BE714939DA BE714939A BE 714939 A BE714939 A BE 714939A BE 714939D A BE714939D A BE 714939DA BE 714939 A BE714939 A BE 714939A
Authority
BE
Belgium
Application number
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 filed Critical
Publication of BE714939A publication Critical patent/BE714939A/xx

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • H03G3/301—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
    • A61B5/021—Measuring pressure in heart or blood vessels
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
    • A61B5/024—Measuring pulse rate or heart rate
    • 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
    • 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
    • A61B5/307—Input circuits therefor specially adapted for particular uses
    • A61B5/308—Input circuits therefor specially adapted for particular uses for electrocardiography [ECG]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
    • H03G1/0047—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using photo-electric elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Cardiology (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Biophysics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Pathology (AREA)
  • Biomedical Technology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physiology (AREA)
  • Vascular Medicine (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)
  • Measurement Of Current Or Voltage (AREA)
BE714939D 1967-05-12 1968-05-10 BE714939A (en:Method)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH679067A CH474190A (de) 1967-05-12 1967-05-12 Verstärkungsschaltungsanordnung zur Erzielung eines praktisch konstanten Wertes einer elektrischen Ausgangsgrösse
CH679267A CH473577A (de) 1967-05-12 1967-05-12 Frequenzmessgerät zur Anzeige von Momentanwerten der Frequenz einer Impulsreihe, insbesondere für medizinische Zwecke

Publications (1)

Publication Number Publication Date
BE714939A true BE714939A (en:Method) 1968-09-30

Family

ID=25700186

Family Applications (1)

Application Number Title Priority Date Filing Date
BE714939D BE714939A (en:Method) 1967-05-12 1968-05-10

Country Status (12)

Country Link
US (1) US3537003A (en:Method)
JP (1) JPS4821301B1 (en:Method)
AT (1) AT292192B (en:Method)
BE (1) BE714939A (en:Method)
CH (2) CH473577A (en:Method)
DE (1) DE1766314A1 (en:Method)
DK (1) DK117313B (en:Method)
ES (1) ES353495A1 (en:Method)
FR (1) FR1562642A (en:Method)
GB (1) GB1165498A (en:Method)
IL (1) IL29933A0 (en:Method)
NL (1) NL6806375A (en:Method)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3673391A (en) * 1970-12-16 1972-06-27 Northern Electric Co Digital frequency multiplying system
US3735263A (en) * 1972-07-12 1973-05-22 Northeast Electronics Corp Digital analysis of electric wave signals
US3906346A (en) * 1972-12-26 1975-09-16 Us Navy Precision time interval comparator
US3842347A (en) * 1973-07-03 1974-10-15 Gardner Denver Co Rate measurement circuit
US3866184A (en) * 1973-08-31 1975-02-11 Gte Automatic Electric Lab Inc Timing monitor circuit for central data processor of digital communication system
US4005364A (en) * 1974-11-15 1977-01-25 Mdh Industries, Inc. Digital circuit for measuring relative frequency in separate pulse trains
US3997740A (en) * 1975-05-30 1976-12-14 Bell Telephone Laboratories, Incorporated Pulse train analyzer
CH611790A5 (en:Method) * 1975-10-08 1979-06-29 Hoffmann La Roche
US4234881A (en) * 1978-09-28 1980-11-18 Motorola, Inc. Dynamic digital time interval discriminator and method
JP2561075B2 (ja) * 1986-07-15 1996-12-04 セイコープレシジョン株式会社 カメラ用アナログ−デイジタル変換回路
CN103954835A (zh) * 2014-03-25 2014-07-30 苏州经贸职业技术学院 一种频率显示装置及其工作方法
CN109738698B (zh) * 2018-12-29 2024-04-30 中国人民解放军陆军工程大学 神经元仿生电路和信号频率检测系统

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2324077A (en) * 1941-12-27 1943-07-13 Rca Corp Measuring circuit
US2933249A (en) * 1955-11-02 1960-04-19 Gen Dynamics Corp Accumulator
GB1045975A (en) * 1963-06-28 1966-10-19 Atomic Energy Authority Uk Period meter and logarithmic ratemeter
US3281723A (en) * 1964-02-03 1966-10-25 Fairchild Recording Equipment Dynamic equalizer circuits having a light dependent cell for producing a relatively constant apparent loudness effect

Also Published As

Publication number Publication date
DK117313B (da) 1970-04-13
NL6806375A (en:Method) 1968-11-13
CH474190A (de) 1969-06-15
FR1562642A (en:Method) 1969-04-04
CH473577A (de) 1969-06-15
ES353495A1 (es) 1969-10-01
GB1165498A (en) 1969-10-01
IL29933A0 (en) 1968-07-25
JPS4821301B1 (en:Method) 1973-06-27
DE1766314A1 (de) 1971-07-01
AT292192B (de) 1971-08-10
US3537003A (en) 1970-10-27

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