DE3861466D1 - Synchrondemodulator. - Google Patents

Synchrondemodulator.

Info

Publication number
DE3861466D1
DE3861466D1 DE8888115271T DE3861466T DE3861466D1 DE 3861466 D1 DE3861466 D1 DE 3861466D1 DE 8888115271 T DE8888115271 T DE 8888115271T DE 3861466 T DE3861466 T DE 3861466T DE 3861466 D1 DE3861466 D1 DE 3861466D1
Authority
DE
Germany
Prior art keywords
synchronous modulator
modulator
synchronous
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 - Fee Related
Application number
DE8888115271T
Other languages
English (en)
Inventor
Joerg Reuschel
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.)
Hewlett Packard GmbH Germany
Original Assignee
Hewlett Packard GmbH Germany
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 Hewlett Packard GmbH Germany filed Critical Hewlett Packard GmbH Germany
Application granted granted Critical
Publication of DE3861466D1 publication Critical patent/DE3861466D1/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/02—Measuring pulse or heart rate
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
    • A61B8/0866—Detecting organic movements or changes, e.g. tumours, cysts, swellings involving foetal diagnosis; pre-natal or peri-natal diagnosis of the baby
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/50—Systems of measurement, based on relative movement of the target
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/22—Homodyne or synchrodyne circuits
    • H03D1/2272—Homodyne or synchrodyne circuits using FET's

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biophysics (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Remote Sensing (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Pregnancy & Childbirth (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Gynecology & Obstetrics (AREA)
  • Cardiology (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
DE8888115271T 1988-09-17 1988-09-17 Synchrondemodulator. Expired - Fee Related DE3861466D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88115271A EP0359839B1 (de) 1988-09-17 1988-09-17 Synchrondemodulator

Publications (1)

Publication Number Publication Date
DE3861466D1 true DE3861466D1 (de) 1991-02-07

Family

ID=8199333

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8888115271T Expired - Fee Related DE3861466D1 (de) 1988-09-17 1988-09-17 Synchrondemodulator.

Country Status (4)

Country Link
US (1) US5097837A (de)
EP (1) EP0359839B1 (de)
JP (1) JP2810720B2 (de)
DE (1) DE3861466D1 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0359839B1 (de) 1988-09-17 1990-12-27 Hewlett-Packard GmbH Synchrondemodulator
GB9322977D0 (en) * 1993-11-08 1994-01-05 Oxford Medical Ltd Fetal heart detector
CZ266699A3 (cs) * 1997-01-13 1999-12-15 John Overton Automatizovaný systém pro archivaci obrazů
JP2001008936A (ja) 1999-04-28 2001-01-16 Seiko Instruments Inc 脈波検出装置
US6789541B2 (en) * 2000-06-14 2004-09-14 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
US20040046672A1 (en) * 2002-09-10 2004-03-11 Kasik John P. System for detecting the condition of a container and for transmitting detected data to a central facility
US8463361B2 (en) * 2007-05-24 2013-06-11 Lifewave, Inc. System and method for non-invasive instantaneous and continuous measurement of cardiac chamber volume
US20100005560A1 (en) * 2008-07-10 2010-01-14 Susan Albizre Pantyhose undergarment for controlling underarm perspiration as well as for providing shape, control and support for the body
US9002427B2 (en) * 2009-03-30 2015-04-07 Lifewave Biomedical, Inc. Apparatus and method for continuous noninvasive measurement of respiratory function and events
US20100274145A1 (en) * 2009-04-22 2010-10-28 Tupin Jr Joe Paul Fetal monitoring device and methods
CN103052356B (zh) * 2010-08-02 2015-11-25 皇家飞利浦电子股份有限公司 减少胎儿监测期间的超声信号含混性的方法
JP6153240B2 (ja) * 2013-01-21 2017-06-28 片倉　景義 非接触音響検査装置
CN104257377B (zh) * 2014-09-28 2016-08-24 成都维客亲源健康科技有限公司 适合于心律检测的超低功耗无电极电阻容积测量电路与方法
EP4033985A4 (de) * 2019-09-27 2023-09-06 BFLY Operations, Inc. Verfahren und vorrichtungen zur überwachung von fetalherzschlag- und uteruskontraktionssignalen

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3813654A (en) * 1971-10-05 1974-05-28 Sonicaid Ltd Diagnostic apparatus for fetal heartbeat monitoring
US3898653A (en) * 1972-02-22 1975-08-05 Mitsubishi Electric Corp Automotive radar sensor
GB1482215A (en) * 1974-04-08 1977-08-10 Brookdeal Electronics Ltd Phase sensitive detector circuits
GB2160731B (en) * 1984-06-22 1987-09-03 Ferranti Plc Demodulator circuit
JPH0634790B2 (ja) * 1985-05-20 1994-05-11 松下電器産業株式会社 超音波ドツプラ血流計
EP0202920B1 (de) * 1985-05-20 1994-03-09 Matsushita Electric Industrial Co., Ltd. Blutgeschwindigkeitsmesser nach dem Ultraschall-Doppler-Prinzip
DE3518967A1 (de) * 1985-05-25 1986-11-27 Hewlett-Packard GmbH, 7030 Böblingen Schaltungsanordnung zum erfassen der herzschlagsbewegung
EP0359839B1 (de) 1988-09-17 1990-12-27 Hewlett-Packard GmbH Synchrondemodulator

Also Published As

Publication number Publication date
EP0359839A1 (de) 1990-03-28
EP0359839B1 (de) 1990-12-27
US5097837A (en) 1992-03-24
JP2810720B2 (ja) 1998-10-15
JPH02116357A (ja) 1990-05-01

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee