DE2219794B2 - - Google Patents

Info

Publication number
DE2219794B2
DE2219794B2 DE2219794A DE2219794A DE2219794B2 DE 2219794 B2 DE2219794 B2 DE 2219794B2 DE 2219794 A DE2219794 A DE 2219794A DE 2219794 A DE2219794 A DE 2219794A DE 2219794 B2 DE2219794 B2 DE 2219794B2
Authority
DE
Germany
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
DE2219794A
Other languages
German (de)
Other versions
DE2219794C3 (de
DE2219794A1 (de
Inventor
Robert Nestor Joseph Van Eindhoven Sluys (Niederlande)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of DE2219794A1 publication Critical patent/DE2219794A1/de
Publication of DE2219794B2 publication Critical patent/DE2219794B2/de
Application granted granted Critical
Publication of DE2219794C3 publication Critical patent/DE2219794C3/de
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H03G9/12—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having semiconductor devices
    • H03G9/18—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having semiconductor devices for tone control and volume expansion or compression
DE2219794A 1971-05-04 1972-04-22 Schaltung für Rauschunterdrückung Expired DE2219794C3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7106040.A NL163388C (nl) 1971-05-04 1971-05-04 Ruisonderdrukkingsschakeling.

Publications (3)

Publication Number Publication Date
DE2219794A1 DE2219794A1 (de) 1972-11-30
DE2219794B2 true DE2219794B2 (enFirst) 1974-05-02
DE2219794C3 DE2219794C3 (de) 1974-12-05

Family

ID=19813073

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2219794A Expired DE2219794C3 (de) 1971-05-04 1972-04-22 Schaltung für Rauschunterdrückung

Country Status (10)

Country Link
US (1) US3818362A (enFirst)
JP (1) JPS5238691B1 (enFirst)
AT (1) AT334107B (enFirst)
AU (1) AU465461B2 (enFirst)
CA (1) CA946485A (enFirst)
DE (1) DE2219794C3 (enFirst)
FR (1) FR2135631B1 (enFirst)
GB (1) GB1393152A (enFirst)
IT (1) IT953872B (enFirst)
NL (1) NL163388C (enFirst)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2655325B1 (de) * 1976-12-07 1977-12-22 Saba Gmbh Magnetbandgeraet mit einer pegel- und frequenzabhaengigen rauschunterdrueckung

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE793740A (fr) * 1972-01-08 1973-05-02 Akai Electric Systeme d'enregistrement magnetique
US3940709A (en) * 1974-12-19 1976-02-24 Ampex Corporation Equalization circuit
US4110784A (en) * 1976-08-30 1978-08-29 Rca Corporation Noise reduction apparatus
NL7609730A (nl) * 1976-09-01 1978-03-03 Novanex Automation Nv Versterker.
JPS5912850Y2 (ja) * 1978-03-06 1984-04-17 ホーチキ株式会社 チヤンネルレベル調整器
CA1188384A (en) * 1981-12-29 1985-06-04 Masayuki Katakura Noise reduction circuit
JPS5972871A (ja) * 1982-10-20 1984-04-24 Hitachi Ltd 固体ビデオカメラの低輝度時雑音低減装置
US4703507A (en) * 1984-04-05 1987-10-27 Holden Thomas W Noise reduction system
US4894566A (en) * 1988-10-18 1990-01-16 Rush Michael J Noise reduction circuit
KR100213073B1 (ko) * 1996-11-09 1999-08-02 윤종용 재생 오디오 신호의 주파수 특성 보상 장치
CN109191387B (zh) * 2018-07-20 2021-09-24 河南师范大学 一种基于巴特沃斯滤波器的红外图像去噪方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3270213A (en) * 1963-10-21 1966-08-30 Princeton Applied Res Corp Frequency responsive network
GB1111863A (en) * 1965-08-07 1968-05-01 English Electric Co Ltd Arrangements for filtering signals
GB1120541A (en) * 1965-08-11 1968-07-17 Dolby Ray Milton Improvements in noise reduction systems
US3631365A (en) * 1968-11-01 1971-12-28 Dolby Laboratories Inc Signal compressors and expanders
US3665345A (en) * 1969-07-21 1972-05-23 Dolby Laboratories Inc Compressors and expanders for noise reduction systems
US3548334A (en) * 1969-07-28 1970-12-15 Matsushita Electric Industrial Co Ltd Noise reduction circuit and system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2655325B1 (de) * 1976-12-07 1977-12-22 Saba Gmbh Magnetbandgeraet mit einer pegel- und frequenzabhaengigen rauschunterdrueckung

Also Published As

Publication number Publication date
FR2135631A1 (enFirst) 1972-12-22
FR2135631B1 (enFirst) 1973-07-13
ATA383572A (de) 1976-04-15
AU4171572A (en) 1973-11-08
NL7106040A (enFirst) 1972-11-07
AT334107B (de) 1976-12-27
DE2219794C3 (de) 1974-12-05
DE2219794A1 (de) 1972-11-30
GB1393152A (en) 1975-05-07
US3818362A (en) 1974-06-18
NL163388C (nl) 1980-08-15
NL163388B (nl) 1980-03-17
JPS5238691B1 (enFirst) 1977-09-30
IT953872B (it) 1973-08-10
CA946485A (en) 1974-04-30
AU465461B2 (en) 1975-09-25

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
E77 Valid patent as to the heymanns-index 1977
8339 Ceased/non-payment of the annual fee