DK571577A - FILTER DEVICE WITH TREQUENCY SELECTIVE FEEDBACK - Google Patents

FILTER DEVICE WITH TREQUENCY SELECTIVE FEEDBACK

Info

Publication number: DK571577A
Authority: DK; Denmark
Prior art keywords: trequency; filter device; selective feedback; selective; feedback
Prior art date: 1976-12-22

Application number

DK571577A

Other languages

Danish (da)

Inventor

R Fehr

P A Grandehamp

Original Assignee

Hoffmann La Roche

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.)

1976-12-22

Filing date

1977-12-21

Publication date

1978-06-23

1977-12-21 Application filed by Hoffmann La Roche filed Critical Hoffmann La Roche

1978-06-23 Publication of DK571577A publication Critical patent/DK571577A/en

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)
Acoustics & Sound (AREA)
Computer Networks & Wireless Communication (AREA)
General Physics & Mathematics (AREA)
Computer Hardware Design (AREA)
Mathematical Physics (AREA)
Ultra Sonic Daignosis Equipment (AREA)
Radar Systems Or Details Thereof (AREA)

DK571577A 1976-12-22 1977-12-21 FILTER DEVICE WITH TREQUENCY SELECTIVE FEEDBACK DK571577A (en)

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 (en)	1978-06-23

Family

ID=4415120

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DK571577A DK571577A (en)	1976-12-22	1977-12-21	FILTER DEVICE WITH TREQUENCY SELECTIVE FEEDBACK

Country Status (8)

Country	Link
JP (1)	JPS5379352A (en)
CH (1)	CH610157A5 (en)
DE (1)	DE2703879A1 (en)
DK (1)	DK571577A (en)
FR (1)	FR2375764A1 (en)
IT (1)	IT1088474B (en)
NL (1)	NL7713734A (en)
SE (1)	SE7714466L (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
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 (en) *	1983-08-26	1985-11-22	Centre Nat Rech Scient	METHOD AND DEVICE FOR MEASURING THE LOCAL SPEED WITHIN A FLUID MEDIUM CONTAINING SUSPENSION INCLUSIONS
FR2580076B1 (en) *	1985-04-05	1990-03-09	Ggr Ultrasonic
DE8812400U1 (en) *	1988-09-30	1989-04-06	Siemens AG, 1000 Berlin und 8000 München	Combined ultrasound imager and Doppler device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
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/en not_active IP Right Cessation
1977
- 1977-01-31 DE DE19772703879 patent/DE2703879A1/en not_active Withdrawn
- 1977-11-29 IT IT30164/77A patent/IT1088474B/en active
- 1977-12-12 NL NL7713734A patent/NL7713734A/en not_active Application Discontinuation
- 1977-12-19 SE SE7714466A patent/SE7714466L/en unknown
- 1977-12-20 FR FR7738441A patent/FR2375764A1/en not_active Withdrawn
- 1977-12-21 JP JP15303977A patent/JPS5379352A/en active Pending
- 1977-12-21 DK DK571577A patent/DK571577A/en not_active Application Discontinuation

Also Published As

Publication number	Publication date
IT1088474B (en)	1985-06-10
FR2375764A1 (en)	1978-07-21
CH610157A5 (en)	1979-03-30
JPS5379352A (en)	1978-07-13
NL7713734A (en)	1978-06-26
DE2703879A1 (en)	1978-07-06
SE7714466L (en)	1978-06-23

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Legal Events

Date	Code	Title	Description
1984-05-26	AHS	Application shelved for other reasons than non-payment