DK571577A - Filterindretning med trekvensselektiv tilbagekobling - Google Patents
Filterindretning med trekvensselektiv tilbagekoblingInfo
- Publication number
- DK571577A DK571577A DK571577A DK571577A DK571577A DK 571577 A DK571577 A DK 571577A DK 571577 A DK571577 A DK 571577A DK 571577 A DK571577 A DK 571577A DK 571577 A DK571577 A DK 571577A
- Authority
- DK
- Denmark
- Prior art keywords
- trequency
- filter device
- selective feedback
- selective
- feedback
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H17/02—Frequency selective networks
- H03H17/0283—Filters characterised by the filter structure
- H03H17/0286—Combinations of filter structures
- H03H17/0289—Digital and active filter structures
-
- 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
- G01S15/52—Discriminating between fixed and moving objects or between objects moving at different speeds
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Hardware Design (AREA)
- Mathematical Physics (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Radar Systems Or Details Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1618376A CH610157A5 (en) | 1976-12-22 | 1976-12-22 | Filter arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DK571577A true DK571577A (da) | 1978-06-23 |
Family
ID=4415120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK571577A DK571577A (da) | 1976-12-22 | 1977-12-21 | Filterindretning med trekvensselektiv tilbagekobling |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5379352A (da) |
| CH (1) | CH610157A5 (da) |
| DE (1) | DE2703879A1 (da) |
| DK (1) | DK571577A (da) |
| FR (1) | FR2375764A1 (da) |
| IT (1) | IT1088474B (da) |
| NL (1) | NL7713734A (da) |
| SE (1) | SE7714466L (da) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1135827A (en) * | 1978-12-04 | 1982-11-16 | Rainer Fehr | Determination of flow velocities by measuring phase difference between the doppler signals |
| FR2551214B1 (fr) * | 1983-08-26 | 1985-11-22 | Centre Nat Rech Scient | Procede et dispositif de mesure de la vitesse locale au sein d'un milieu fluide porteur d'inclusions en suspension |
| FR2580076B1 (da) * | 1985-04-05 | 1990-03-09 | Ggr Ultrasonic | |
| DE8812400U1 (de) * | 1988-09-30 | 1989-04-06 | Siemens AG, 1000 Berlin und 8000 München | Kombiniertes Ultraschall-Bild- und Dopplergerät |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3894219A (en) * | 1974-01-16 | 1975-07-08 | Westinghouse Electric Corp | Hybrid analog and digital comb filter for clutter cancellation |
-
1976
- 1976-12-22 CH CH1618376A patent/CH610157A5/xx not_active IP Right Cessation
-
1977
- 1977-01-31 DE DE19772703879 patent/DE2703879A1/de not_active Withdrawn
- 1977-11-29 IT IT30164/77A patent/IT1088474B/it active
- 1977-12-12 NL NL7713734A patent/NL7713734A/xx not_active Application Discontinuation
- 1977-12-19 SE SE7714466A patent/SE7714466L/xx unknown
- 1977-12-20 FR FR7738441A patent/FR2375764A1/fr not_active Withdrawn
- 1977-12-21 JP JP15303977A patent/JPS5379352A/ja active Pending
- 1977-12-21 DK DK571577A patent/DK571577A/da not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| NL7713734A (nl) | 1978-06-26 |
| IT1088474B (it) | 1985-06-10 |
| DE2703879A1 (de) | 1978-07-06 |
| JPS5379352A (en) | 1978-07-13 |
| CH610157A5 (en) | 1979-03-30 |
| FR2375764A1 (fr) | 1978-07-21 |
| SE7714466L (sv) | 1978-06-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AHS | Application shelved for other reasons than non-payment |