AU465461B2 - Noise reduction circuit - Google Patents

Noise reduction circuit

Info

Publication number
AU465461B2
AU465461B2 AU41715/72A AU4171572A AU465461B2 AU 465461 B2 AU465461 B2 AU 465461B2 AU 41715/72 A AU41715/72 A AU 41715/72A AU 4171572 A AU4171572 A AU 4171572A AU 465461 B2 AU465461 B2 AU 465461B2
Authority
AU
Australia
Prior art keywords
noise reduction
reduction circuit
circuit
noise
reduction
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.)
Expired
Application number
AU41715/72A
Other languages
English (en)
Other versions
AU4171572A (en
Inventor
Nestor Joseph Van Sleuys Robert
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 AU4171572A publication Critical patent/AU4171572A/en
Application granted granted Critical
Publication of AU465461B2 publication Critical patent/AU465461B2/en
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
AU41715/72A 1971-05-04 1972-05-01 Noise reduction circuit Expired AU465461B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NLNL7106040 1971-05-04
NL7106040.A NL163388C (nl) 1971-05-04 1971-05-04 Ruisonderdrukkingsschakeling.

Publications (2)

Publication Number Publication Date
AU4171572A AU4171572A (en) 1973-11-08
AU465461B2 true AU465461B2 (en) 1975-09-25

Family

ID=19813073

Family Applications (1)

Application Number Title Priority Date Filing Date
AU41715/72A Expired AU465461B2 (en) 1971-05-04 1972-05-01 Noise reduction circuit

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)

Families Citing this family (12)

* 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.
DE2655325C2 (de) * 1976-12-07 1984-01-26 Saba Gmbh, 7730 Villingen-Schwenningen Magnetbandgerät mit einer im Wiedergabebetrieb wirksamen Rauschunterdrückungs-Schaltung
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

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
DE2219794B2 (enFirst) 1974-05-02
CA946485A (en) 1974-04-30

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