FR2425773A1 - Filtre numerique - Google Patents

Filtre numerique

Info

Publication number
FR2425773A1
FR2425773A1 FR7911686A FR7911686A FR2425773A1 FR 2425773 A1 FR2425773 A1 FR 2425773A1 FR 7911686 A FR7911686 A FR 7911686A FR 7911686 A FR7911686 A FR 7911686A FR 2425773 A1 FR2425773 A1 FR 2425773A1
Authority
FR
France
Prior art keywords
digital filter
memory
random access
circuit
access memory
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.)
Granted
Application number
FR7911686A
Other languages
English (en)
Other versions
FR2425773B1 (fr
Inventor
Kenji Nakayama
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.)
NEC Corp
Original Assignee
Nippon Electric Co Ltd
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
Priority claimed from JP5533578A external-priority patent/JPS54146943A/ja
Priority claimed from JP10031378A external-priority patent/JPS5528154A/ja
Application filed by Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Publication of FR2425773A1 publication Critical patent/FR2425773A1/fr
Application granted granted Critical
Publication of FR2425773B1 publication Critical patent/FR2425773B1/fr
Expired legal-status Critical Current

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
    • H03H17/04—Recursive filters

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Complex Calculations (AREA)
  • Networks Using Active Elements (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Abstract

L'INVENTION A POUR OBJET UN FILTRE NUMERIQUE QUI REALISE DES OPERATIONS MATHEMATIQUES DE FILTRAGE EN UTILISANT UNE MEMOIRE MORTE ET UNE MEMOIRE A ACCES ALEATOIRE. SELON L'INVENTION, L'ECHANTILLON DE SORTIE Y (N) EST OBTENU APRES FILTRAGE DE L'ECHANTILLON D'ENTREE ZI EN UTILISANT UN FILTRE NUMERIQUE 30 QUI COMPREND ESSENTIELLEMENT UNE MEMOIRE A ACCES ALEATOIRE 31, UNE MEMOIRE MORTE 32, DES CIRCUITS OPERATIONNELS 33, 34, UN ADDITIONNEUR 35, UNE MEMOIRE A ACCES ALEATOIRE 36, UN SELECTEUR 37 ET UN CIRCUIT OPERATIONNEL 38. GRACE A L'UTILISATION D'UN TEL CIRCUIT, IL EST POSSIBLE DE DIMINUER LES CAPACITES DE MEMOIRE UTILISEES, PAR RAPPORT A CELLES DE CIRCUIT CLASSIQUE. L'INVENTION S'APPLIQUE EN PARTICULIER AUX DISPOSITIFS MODULATEURSDEMODULATEURS.
FR7911686A 1978-05-10 1979-05-09 Filtre numerique Expired FR2425773B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP5533578A JPS54146943A (en) 1978-05-10 1978-05-10 Non-cyclic digital filter
JP10031378A JPS5528154A (en) 1978-08-16 1978-08-16 Matrix operation unit

Publications (2)

Publication Number Publication Date
FR2425773A1 true FR2425773A1 (fr) 1979-12-07
FR2425773B1 FR2425773B1 (fr) 1986-05-30

Family

ID=26396229

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7911686A Expired FR2425773B1 (fr) 1978-05-10 1979-05-09 Filtre numerique

Country Status (3)

Country Link
US (1) US4255794A (fr)
DE (1) DE2918692C2 (fr)
FR (1) FR2425773B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021018A1 (fr) * 1979-05-16 1981-01-07 Nec Corporation Filtres numériques

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5698022A (en) * 1980-01-07 1981-08-07 Nec Corp Difference coefficient digital filter
JPS56147260A (en) * 1980-04-18 1981-11-16 Nec Corp Lsi for digital signal processing
GB2075299B (en) * 1980-04-22 1983-10-19 Casio Computer Co Ltd Digital filter device
JPS5979349A (ja) * 1982-10-29 1984-05-08 Toshiba Corp 演算装置
JPH0834408B2 (ja) * 1983-12-23 1996-03-29 ソニー株式会社 Ｉｉｒデイジタルフイルタ
FR2564660B1 (fr) * 1984-05-21 1994-06-10 Enertec Filtre numerique resonant
JPS6153839A (ja) * 1984-08-23 1986-03-17 Sony Corp 波形整形装置
US4691293A (en) * 1984-12-28 1987-09-01 Ford Aerospace & Communications Corporation High frequency, wide range FIR filter
US4750144A (en) * 1985-12-31 1988-06-07 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Real time pipelined system for forming the sum of products in the processing of video data
US5260888A (en) * 1992-05-28 1993-11-09 Eastman Kodak Company Shift and add digital signal processor
US5432723A (en) * 1993-12-02 1995-07-11 Motorola, Inc. Parallel infinite impulse response (IIR) filter with low quantization effects and method therefor
US6175849B1 (en) * 1998-02-10 2001-01-16 Lucent Technologies, Inc. System for digital filtering in a fixed number of clock cycles
US20030145025A1 (en) * 2002-01-31 2003-07-31 Allred Rustin W. Method of designing families of boost and cut filters, including treble and bass controls and graphic equalizers
GB2455806B (en) * 2007-12-21 2010-04-14 Wolfson Microelectronics Plc Filter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2118410A5 (fr) * 1970-12-17 1972-07-28 Ibm France
DE2543697A1 (de) * 1975-09-30 1977-03-31 Siemens Ag Variables digitalfilter hoher bitrate
FR2379946A1 (fr) * 1977-02-04 1978-09-01 Labo Cent Telecommunicat Filtre numerique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL176124C (nl) * 1974-06-17 1985-02-18 Philips Nv Digitaal filter met vereenvoudigde vermenigvuldiginrichting.
US4125900A (en) * 1977-07-01 1978-11-14 Ncr Corporation Cascaded recursive digital filter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2118410A5 (fr) * 1970-12-17 1972-07-28 Ibm France
US3777130A (en) * 1970-12-17 1973-12-04 Ibm Digital filter for pcm encoded signals
DE2543697A1 (de) * 1975-09-30 1977-03-31 Siemens Ag Variables digitalfilter hoher bitrate
FR2379946A1 (fr) * 1977-02-04 1978-09-01 Labo Cent Telecommunicat Filtre numerique

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
EXBK/75 *
EXBK/76 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021018A1 (fr) * 1979-05-16 1981-01-07 Nec Corporation Filtres numériques

Also Published As

Publication number Publication date
US4255794A (en) 1981-03-10
DE2918692C2 (de) 1985-01-24
DE2918692A1 (de) 1979-11-22
FR2425773B1 (fr) 1986-05-30

Similar Documents

Publication Publication Date Title
FR2425773A1 (fr) Filtre numerique
KR890016754A (ko) 아날로그 회로 및 필터장치
FR2491947B1 (fr) Additif de lavage exempt de phosphates et detergents contenant un tel additif
NL7506124A (nl) Werkwijze en apparaat voor de verwerking van slibfilterkoek.
FR2408266A1 (fr) Dispositif de commutation pour signaux numeriques
AT380680B (de) Filterpresse zum entwaessern von schlaemmen und aehnlichen substanzen
DE3382320D1 (de) Verfahren zum sortieren von koernigem material und maschine zur ausfuehrung dieses verfahrens.
SE7506777L (sv) Digital filteranordning for behandling av binerkodade signalsamplingar.
FR2355399A1 (fr) Circuit amplificateur de capacite
FR2398417A1 (fr) Convertisseur de code a integration
DE68910729D1 (de) Verfahren für die Flockung von Schlamm.
DE69101279D1 (de) Neutrale oder positiv geladene Farbstoffe für Lösungen zum Laden von elektrophoretischen Proben.
ATA910777A (de) Anlage zum abtrennen und entfernen von oelartigen substanzen von fluessigkeiten, wie wasser
FR2363859A1 (fr) Circuit de precharge
FR2434517A1 (fr) Filtre passe-bande
FR2427023A1 (fr) Circuit de synchronisation de chrominance
BE790611A (fr) Dispositif pour analyser le rapport de la largeur d'impulsion des parties de cycle d'un signal d'entree
EP0288783A3 (fr) Dispositif pour le codage DPCM de signaux de télévision
KR910005594A (ko) 파일롯트 소거회로
JPS57208782A (en) Color solid-state image pickup device
JPS5255059A (en) Device for continuously filtering sample water
FR2417217A1 (fr) Circuit integre monolithique
AT332818B (de) Vorrichtung zum entwassern von suspensionen, wie abwasserschlammen
FR2414823A1 (fr) Dispositif dephaseur a semi-conducteur et filtre a transfert de charges comportant un tel dispositif
SU491108A1 (ru) Анализатор импульсных сигналов

Legal Events

Date Code Title Description
ST Notification of lapse