IL29933A0 - Frequency measuring apparatus - Google Patents

Frequency measuring apparatus

Info

Publication number
IL29933A0
IL29933A0 IL29933A IL2993368A IL29933A0 IL 29933 A0 IL29933 A0 IL 29933A0 IL 29933 A IL29933 A IL 29933A IL 2993368 A IL2993368 A IL 2993368A IL 29933 A0 IL29933 A0 IL 29933A0
Authority
IL
Israel
Prior art keywords
measuring apparatus
frequency measuring
frequency
measuring
Prior art date
Application number
IL29933A
Other languages
English (en)
Original Assignee
Hoffmann La Roche
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 Hoffmann La Roche filed Critical Hoffmann La Roche
Publication of IL29933A0 publication Critical patent/IL29933A0/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)
IL29933A 1967-05-12 1968-05-05 Frequency measuring apparatus IL29933A0 (en)

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
IL29933A0 true IL29933A0 (en) 1968-07-25

Family

ID=25700186

Family Applications (1)

Application Number Title Priority Date Filing Date
IL29933A IL29933A0 (en) 1967-05-12 1968-05-05 Frequency measuring apparatus

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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109738698A (zh) * 2018-12-29 2019-05-10 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

Families Citing this family (11)

* 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

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109738698A (zh) * 2018-12-29 2019-05-10 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
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

Also Published As

Publication number Publication date
DK117313B (da) 1970-04-13
NL6806375A (en:Method) 1968-11-13
CH474190A (de) 1969-06-15
BE714939A (en:Method) 1968-09-30
FR1562642A (en:Method) 1969-04-04
CH473577A (de) 1969-06-15
ES353495A1 (es) 1969-10-01
GB1165498A (en) 1969-10-01
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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