GB2080068B - Digital filter apparatus - Google Patents

Digital filter apparatus

Info

Publication number: GB2080068B
Authority: GB; United Kingdom
Prior art keywords: digital filter; filter apparatus; digital; filter
Prior art date: 1980-07-09
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

Application number

GB8120520A

Other versions

GB2080068A (en

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.)

Casio Computer Co Ltd

Original Assignee

Casio Computer 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.)

1980-07-09

Filing date

1981-07-02

Publication date

1985-04-03

1980-07-09 Priority claimed from JP9446180A external-priority patent/JPS5720010A/en

1980-07-09 Priority claimed from JP9446680A external-priority patent/JPS5720015A/en

1980-07-09 Priority claimed from JP9446380A external-priority patent/JPS5720012A/en

1980-07-09 Priority claimed from JP9446280A external-priority patent/JPS5720011A/en

1981-02-26 Priority claimed from JP56027912A external-priority patent/JPS57142022A/en

1981-07-02 Application filed by Casio Computer Co Ltd filed Critical Casio Computer Co Ltd

1982-01-27 Publication of GB2080068A publication Critical patent/GB2080068A/en

1985-04-03 Application granted granted Critical

1985-04-03 Publication of GB2080068B publication Critical patent/GB2080068B/en

Status Expired legal-status Critical Current

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
- H03H17/0294—Variable filters; Programmable filters
- 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)
Filters That Use Time-Delay Elements (AREA)
Networks Using Active Elements (AREA)

GB8120520A 1980-07-09 1981-07-02 Digital filter apparatus Expired GB2080068B (en)

Applications Claiming Priority (5)

Application Number	Priority Date	Filing Date	Title
JP9446180A JPS5720010A (en)	1980-07-09	1980-07-09	Digital filter device
JP9446680A JPS5720015A (en)	1980-07-09	1980-07-09	High-pass filter
JP9446380A JPS5720012A (en)	1980-07-09	1980-07-09	Band-pass filter
JP9446280A JPS5720011A (en)	1980-07-09	1980-07-09	Digital filter device
JP56027912A JPS57142022A (en)	1981-02-26	1981-02-26	Resonance characteristic controlling system in digital filter

Publications (2)

Publication Number	Publication Date
GB2080068A GB2080068A (en)	1982-01-27
GB2080068B true GB2080068B (en)	1985-04-03

Family

ID=27520976

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
GB8120520A Expired GB2080068B (en)	1980-07-09	1981-07-02	Digital filter apparatus

Country Status (2)

Country	Link
DE (1)	DE3127189C2 (en)
GB (1)	GB2080068B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4494214A (en) *	1983-02-03	1985-01-15	Rca Corporation	Apparatus for generating scaled weighting coefficients for sampled data filters
JP2892205B2 (en) *	1991-11-28	1999-05-17	株式会社ケンウッド	Transmission frequency characteristic correction device
WO1993011647A1 (en) *	1991-11-28	1993-06-10	Kabushiki Kaisha Kenwood	Device for correcting frequency characteristic of sound field
JP4308955B2 (en) *	1999-01-20	2009-08-05	パナソニック株式会社	Filter device and filter coefficient acquisition method thereof
US6581080B1 (en)	1999-04-16	2003-06-17	Sony United Kingdom Limited	Digital filters
GB9908810D0 (en) *	1999-04-16	1999-06-09	Sony Uk Ltd	Digital filtering
GB2378331A (en) *	2001-07-30	2003-02-05	Ipwireless Inc	Digital filter for multi-rate communication

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
NL7506141A (en) *	1975-05-26	1976-11-30	Philips Nv	DIGITAL FILTER.

1981
- 1981-07-02 GB GB8120520A patent/GB2080068B/en not_active Expired
- 1981-07-09 DE DE19813127189 patent/DE3127189C2/en not_active Expired

Also Published As

Publication number	Publication date
DE3127189A1 (en)	1982-03-11
GB2080068A (en)	1982-01-27
DE3127189C2 (en)	1986-06-19

Publication	Publication Date	Title
GB2133306B (en)	1985-11-13	Filtration apparatus
ZA812294B (en)	1982-04-28	Filtering apparatus
DE3366524D1 (en)	1986-11-06	Filter apparatus
JPS57150820A (en)	1982-09-17	Filter
YU278881A (en)	1983-10-31	Cigarett filter
JPS5791711A (en)	1982-06-08	Filter
GB2124848B (en)	1986-01-08	Digital filter
JPS56111081A (en)	1981-09-02	Filter
GB2080695B (en)	1984-03-07	Engine-fuel filter
GB2080141B (en)	1984-06-27	Filter elements
GB2075299B (en)	1983-10-19	Digital filter device
GB2081544B (en)	1984-03-28	Digital filters
GB2132440B (en)	1986-03-05	Digital filter
DE3366073D1 (en)	1986-10-16	Filter apparatus
EP0034241A3 (en)	1982-04-21	Non-recursive digital filter
DE3266128D1 (en)	1985-10-17	Filter apparatus
JPS57122913A (en)	1982-07-31	Filter
GB2102654B (en)	1984-09-26	Image filter
GB2080068B (en)	1985-04-03	Digital filter apparatus
JPS5789693A (en)	1982-06-04	Filtering apparatus
JPS5759609A (en)	1982-04-10	Filter
GB8330562D0 (en)	1983-12-21	Filtration apparatus
JPS56138380A (en)	1981-10-28	Filter
GB2077130B (en)	1984-01-25	Filtration apparatus
GB2067087B (en)	1983-09-01	Filter

Legal Events

Date	Code	Title	Description
2001-07-25	PE20	Patent expired after termination of 20 years	Effective date: 20010701