GB1165498A - Frequency Measuring Apparatus - Google Patents

Frequency Measuring Apparatus

Info

Publication number
GB1165498A
GB1165498A GB21377/68A GB2137768A GB1165498A GB 1165498 A GB1165498 A GB 1165498A GB 21377/68 A GB21377/68 A GB 21377/68A GB 2137768 A GB2137768 A GB 2137768A GB 1165498 A GB1165498 A GB 1165498A
Authority
GB
United Kingdom
Prior art keywords
counter
gate
pulse
pulses
frequency
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
GB21377/68A
Other languages
English (en)
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.)
F Hoffmann La Roche AG
Original Assignee
F Hoffmann La Roche AG
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 F Hoffmann La Roche AG filed Critical F Hoffmann La Roche AG
Publication of GB1165498A publication Critical patent/GB1165498A/en
Expired legal-status Critical Current

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)
  • Medical Informatics (AREA)
  • Veterinary Medicine (AREA)
  • Biophysics (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Pathology (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Physiology (AREA)
  • Vascular Medicine (AREA)
  • Multimedia (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)
  • Measurement Of Current Or Voltage (AREA)
GB21377/68A 1967-05-12 1968-05-06 Frequency Measuring Apparatus Expired GB1165498A (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
GB1165498A true GB1165498A (en) 1969-10-01

Family

ID=25700186

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21377/68A Expired GB1165498A (en) 1967-05-12 1968-05-06 Frequency Measuring Apparatus

Country Status (12)

Country Link
US (1) US3537003A (enExample)
JP (1) JPS4821301B1 (enExample)
AT (1) AT292192B (enExample)
BE (1) BE714939A (enExample)
CH (2) CH474190A (enExample)
DE (1) DE1766314A1 (enExample)
DK (1) DK117313B (enExample)
ES (1) ES353495A1 (enExample)
FR (1) FR1562642A (enExample)
GB (1) GB1165498A (enExample)
IL (1) IL29933A0 (enExample)
NL (1) NL6806375A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

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 (enExample) * 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
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Also Published As

Publication number Publication date
BE714939A (enExample) 1968-09-30
US3537003A (en) 1970-10-27
FR1562642A (enExample) 1969-04-04
DK117313B (da) 1970-04-13
DE1766314A1 (de) 1971-07-01
IL29933A0 (en) 1968-07-25
NL6806375A (enExample) 1968-11-13
ES353495A1 (es) 1969-10-01
JPS4821301B1 (enExample) 1973-06-27
CH474190A (de) 1969-06-15
AT292192B (de) 1971-08-10
CH473577A (de) 1969-06-15

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees