DE2732754C2 - Schaltvorrichtung mit mindestens einem Abschwächerkreis für eine Ultraschall-Impulsechovorrichtung - Google Patents
Schaltvorrichtung mit mindestens einem Abschwächerkreis für eine Ultraschall-ImpulsechovorrichtungInfo
- Publication number
- DE2732754C2 DE2732754C2 DE2732754A DE2732754A DE2732754C2 DE 2732754 C2 DE2732754 C2 DE 2732754C2 DE 2732754 A DE2732754 A DE 2732754A DE 2732754 A DE2732754 A DE 2732754A DE 2732754 C2 DE2732754 C2 DE 2732754C2
- Authority
- DE
- Germany
- Prior art keywords
- impedance
- attenuator
- circuit
- signal
- output
- 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
Links
- 239000004065 semiconductor Substances 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 4
- 239000000523 sample Substances 0.000 claims description 3
- 230000003313 weakening effect Effects 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 16
- 230000002238 attenuated effect Effects 0.000 description 10
- 230000001419 dependent effect Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/24—Frequency- independent attenuators
- H03H7/25—Frequency- independent attenuators comprising an element controlled by an electric or magnetic variable
-
- 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
-
- 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
- G01N29/11—Analysing solids by measuring attenuation of acoustic waves
-
- 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
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/30—Arrangements for calibrating or comparing, e.g. with standard objects
-
- 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
-
- 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
- G01N29/48—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by amplitude comparison
-
- 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
- G01S7/52004—Means for monitoring or calibrating
-
- 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
- G01N2291/04—Wave modes and trajectories
- G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Signal Processing (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Electronic Switches (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/708,556 US4050055A (en) | 1976-07-26 | 1976-07-26 | Attenuator circuit ultrasonic testing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2732754A1 DE2732754A1 (de) | 1978-02-09 |
| DE2732754C2 true DE2732754C2 (de) | 1984-06-28 |
Family
ID=24846272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2732754A Expired DE2732754C2 (de) | 1976-07-26 | 1977-07-20 | Schaltvorrichtung mit mindestens einem Abschwächerkreis für eine Ultraschall-Impulsechovorrichtung |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4050055A (enExample) |
| JP (1) | JPS5351789A (enExample) |
| CA (1) | CA1080341A (enExample) |
| DE (1) | DE2732754C2 (enExample) |
| FR (1) | FR2360075A1 (enExample) |
| GB (1) | GB1585812A (enExample) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58174668A (ja) * | 1982-04-05 | 1983-10-13 | 株式会社クラレ | 不織布の製造方法 |
| IT1215237B (it) * | 1985-02-20 | 1990-01-31 | Ates Componenti Elettron | Attenuatore a basso rumore ed elevata stabilita'termica,di tipo integrabile |
| US4654610A (en) * | 1985-07-23 | 1987-03-31 | Hewlett-Packard Company | PIN diode switched RF signal attenuator |
| US5208785A (en) * | 1990-09-26 | 1993-05-04 | Rowe, Deines Instruments Incorporated | Broadband acoustic doppler current profiler |
| IT1249299B (it) * | 1991-04-30 | 1995-02-22 | Sgs Thomson Microelectronics | Circuito integrato con componenti passivi trimmabili |
| US6052334A (en) * | 1998-08-04 | 2000-04-18 | Rowe-Deines Instruments | System and method for measuring wave directional spectrum and wave height |
| US7065466B2 (en) * | 2004-01-29 | 2006-06-20 | Advanced Testing Technologies, Inc. | Attenuator test system |
| US7477085B2 (en) * | 2006-05-26 | 2009-01-13 | Microtune (Texas), L.P. | Digital attenuator circuits and methods for use thereof |
| US7853227B2 (en) * | 2006-05-26 | 2010-12-14 | Microtune (Texas), L.P. | AGC system and method for broadband tuners |
| US20110025396A1 (en) * | 2006-05-26 | 2011-02-03 | Microtune (Texas), L.P. | Digital Attenuator Circuits and Methods for Use thereof |
| US7847925B2 (en) | 2007-06-18 | 2010-12-07 | Teledyne Rd Instruments, Inc. | System and method of acoustic doppler beamforming |
| US8254208B2 (en) * | 2008-12-08 | 2012-08-28 | Teledyne Rd Instruments, Inc. | Multi-state beamforming array |
| EP2435851B1 (en) * | 2009-05-27 | 2016-07-06 | Teledyne Instruments, Inc. | System and method for determining wave characteristics from a moving platform |
| US10260466B2 (en) | 2016-04-29 | 2019-04-16 | Progeny Systems Corporation | Ultrasonic contaminant detection system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1556245A (enExample) * | 1966-11-30 | 1969-02-07 | ||
| US3553636A (en) * | 1969-01-27 | 1971-01-05 | Bindicator Co | Noncontact ultrasonic interface viscosity and percent solid detecting device |
| US3594652A (en) * | 1969-04-07 | 1971-07-20 | Tektronix Inc | Low impedance input, variable attenuation amplifier |
| FR2105349A5 (enExample) * | 1970-09-02 | 1972-04-28 | Siderurgie Fse Inst Rech | |
| NL7215200A (enExample) * | 1972-11-10 | 1974-05-14 | ||
| US3796945A (en) * | 1973-05-15 | 1974-03-12 | Beltone Electronics Corp | Digital attenuator wherein transistor switch means are biased by rectifier circuit |
-
1976
- 1976-07-26 US US05/708,556 patent/US4050055A/en not_active Expired - Lifetime
-
1977
- 1977-07-20 DE DE2732754A patent/DE2732754C2/de not_active Expired
- 1977-07-22 JP JP8826177A patent/JPS5351789A/ja active Granted
- 1977-07-22 GB GB30794/77A patent/GB1585812A/en not_active Expired
- 1977-07-25 CA CA283,432A patent/CA1080341A/en not_active Expired
- 1977-07-26 FR FR7722932A patent/FR2360075A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| DE2732754A1 (de) | 1978-02-09 |
| JPS5351789A (en) | 1978-05-11 |
| CA1080341A (en) | 1980-06-24 |
| FR2360075B1 (enExample) | 1981-09-18 |
| JPS5617029B2 (enExample) | 1981-04-20 |
| GB1585812A (en) | 1981-03-11 |
| FR2360075A1 (fr) | 1978-02-24 |
| US4050055A (en) | 1977-09-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OD | Request for examination | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |