FR2389903A1 - - Google Patents
Info
- Publication number
- FR2389903A1 FR2389903A1 FR7813319A FR7813319A FR2389903A1 FR 2389903 A1 FR2389903 A1 FR 2389903A1 FR 7813319 A FR7813319 A FR 7813319A FR 7813319 A FR7813319 A FR 7813319A FR 2389903 A1 FR2389903 A1 FR 2389903A1
- Authority
- FR
- France
- Prior art keywords
- signals
- limiting means
- predetermined level
- amplitude limiting
- amplitude
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
- H03G11/02—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general by means of diodes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
- G01N29/0609—Display arrangements, e.g. colour displays
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/36—Detecting the response signal, e.g. electronic circuits specially adapted therefor
- G01N29/40—Detecting the response signal, e.g. electronic circuits specially adapted therefor by amplitude filtering, e.g. by applying a threshold or by gain control
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
- G01N29/4454—Signal recognition, e.g. specific values or portions, signal events, signatures
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/28—Details of pulse systems
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/52017—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 particularly adapted to short-range imaging
- G01S7/52023—Details of receivers
- G01S7/52025—Details of receivers for pulse systems
- G01S7/52026—Extracting wanted echo signals
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G7/00—Volume compression or expansion in amplifiers
- H03G7/001—Volume compression or expansion in amplifiers without controlling loop
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/02854—Length, thickness
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Pathology (AREA)
- Immunology (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Radar, Positioning & Navigation (AREA)
- Computer Networks & Wireless Communication (AREA)
- Remote Sensing (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
Circuit de traitement de signaux électriques, caractérisé en ce qu'il comprend: des premiers moyens de limitation d'amplitude pour laisser passer des signaux appliqués en comprimant les amplitude de ces signaux qui excèdent un niveau prédéterminé; des seconds moyens de limitation d'amplitude connectés de façon à recevoir et à laisser passer des signaux de sortie provenant des premiers moyens de limitation d'amplitude, tout en comprimant les amplitudes de ces signaux qui, à l'entrée des premiers moyens de limitation d'amplitude, ont dépassé un second niveau prédéterminé inférieur au premier niveau prédéterminé ; et un additionneur connecté de façon à produire un signal de sortie final qui constitue la somme des signaux de sortie correspondants des premiers et seconds moyens de limitation d'amplitude. Application aux échoscopes.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPD000577 | 1977-05-06 | ||
AU35740/78A AU517998B2 (en) | 1977-05-06 | 1977-05-06 | Signal processing system |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2389903A1 true FR2389903A1 (fr) | 1978-12-01 |
Family
ID=25623415
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7813319A Pending FR2389903A1 (fr) | 1977-05-06 | 1978-05-05 |
Country Status (7)
Country | Link |
---|---|
US (1) | US4289140A (fr) |
JP (1) | JPS5417078A (fr) |
AU (1) | AU517998B2 (fr) |
CA (1) | CA1123087A (fr) |
DE (1) | DE2819948A1 (fr) |
FR (1) | FR2389903A1 (fr) |
GB (1) | GB1601413A (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0478389A1 (fr) * | 1990-09-27 | 1992-04-01 | Nec Corporation | Amplificateur à caractéristique de sortie polygonale |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2939617C2 (de) * | 1979-09-29 | 1986-02-06 | Edotronik Gesellschaft für Elektronik-Systeme mbH & Co Optoelektronik KG, 8000 München | Vorrichtung zur schnellen und verzerrungsfreien Umwandlung der von einem Detektor erzeugten analogen Ultraschallprüfsignale in digitale Signale |
JPS60210245A (ja) * | 1984-04-02 | 1985-10-22 | アロカ株式会社 | 超音波ドプラ診断装置 |
US4432236A (en) * | 1981-12-15 | 1984-02-21 | Olympus Optical Co., Ltd. | Signal processing circuit of ultrasonic diagnostic apparatus |
CA1192654A (fr) * | 1982-01-11 | 1985-08-27 | Technicare Corporation | Dispositif et methode de stockage d'images a ultrasons |
US4454884A (en) * | 1982-09-27 | 1984-06-19 | Advanced Technology Laboratories, Inc. | Wide dynamic range ultrasound echo receiver |
JPH0543771Y2 (fr) * | 1985-01-10 | 1993-11-05 | ||
US5588428A (en) * | 1993-04-28 | 1996-12-31 | The University Of Akron | Method and apparatus for non-invasive volume and texture analysis |
US6200267B1 (en) | 1998-05-13 | 2001-03-13 | Thomas Burke | High-speed ultrasound image improvement using an optical correlator |
JP4444008B2 (ja) * | 2004-06-02 | 2010-03-31 | パナソニック株式会社 | 超音波診断装置 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3483860A (en) * | 1964-11-02 | 1969-12-16 | Norman Stanley Namerow | Method for monitoring intrasomatic circulatory functions and organ movement |
US3483475A (en) * | 1966-01-11 | 1969-12-09 | Us Navy | Extended range log amplifier |
US3458652A (en) * | 1966-04-22 | 1969-07-29 | Columbia Broadcasting Syst Inc | Gamma correction circuit |
US3509368A (en) * | 1967-04-26 | 1970-04-28 | Us Navy | Circuit for extending the linear operating range of log amplifiers |
SE346468B (fr) * | 1969-02-24 | 1972-07-10 | Lkb Medical Ab | |
US3636462A (en) * | 1970-12-11 | 1972-01-18 | Atomic Energy Commission | Automatic dc level controlling system for a dc-coupled amplifier |
US3793480A (en) * | 1971-12-29 | 1974-02-19 | United Aircraft Corp | Exponential transconductance multiplier and integrated video processor |
US3813609A (en) * | 1972-11-27 | 1974-05-28 | Petty Ray Geophysical Inc | Multiple stage sample normalizing amplifier with automatic gain prediction |
NL7217703A (fr) * | 1972-12-28 | 1974-07-02 | ||
GB1448697A (en) * | 1973-09-25 | 1976-09-08 | Post Office | Non-linear correction of waveforms |
US3919657A (en) * | 1973-11-12 | 1975-11-11 | Texaco Inc | Wide dynamic range amplifier system with slew rate control |
DE2606270C3 (de) * | 1976-02-17 | 1978-11-23 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Mehrstufige Begrenzerverstärkerschaltung |
-
1977
- 1977-05-06 AU AU35740/78A patent/AU517998B2/en not_active Expired
-
1978
- 1978-05-02 CA CA302,435A patent/CA1123087A/fr not_active Expired
- 1978-05-05 FR FR7813319A patent/FR2389903A1/fr active Pending
- 1978-05-05 GB GB18075/78A patent/GB1601413A/en not_active Expired
- 1978-05-06 JP JP5401378A patent/JPS5417078A/ja active Pending
- 1978-05-06 DE DE19782819948 patent/DE2819948A1/de not_active Withdrawn
-
1979
- 1979-08-31 US US06/071,098 patent/US4289140A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0478389A1 (fr) * | 1990-09-27 | 1992-04-01 | Nec Corporation | Amplificateur à caractéristique de sortie polygonale |
Also Published As
Publication number | Publication date |
---|---|
AU3574078A (en) | 1979-11-08 |
JPS5417078A (en) | 1979-02-08 |
CA1123087A (fr) | 1982-05-04 |
DE2819948A1 (de) | 1978-12-07 |
AU517998B2 (en) | 1981-09-10 |
GB1601413A (en) | 1981-10-28 |
US4289140A (en) | 1981-09-15 |
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