CA946485A - Noise reduction circuit - Google Patents

Noise reduction circuit

Info

Publication number: CA946485A
Authority: CA; Canada
Prior art keywords: noise reduction; reduction circuit; circuit; noise; reduction
Prior art date: 1971-05-04
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

CA140,937A

Other languages

English (en)

Other versions

CA140937S (en

Inventor

Robert N.J. Van Sluys

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.)

1971-05-04

Filing date

1972-05-01

Publication date

1974-04-30

1972-05-01 Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV

1974-04-30 Application granted granted Critical

1974-04-30 Publication of CA946485A publication Critical patent/CA946485A/en

Status Expired legal-status Critical Current

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

CA140,937A 1971-05-04 1972-05-01 Noise reduction circuit Expired CA946485A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number	Publication Date
CA946485A true CA946485A (en)	1974-04-30

Family

ID=19813073

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA140,937A Expired CA946485A (en)	1971-05-04	1972-05-01	Noise reduction circuit

Country Status (10)

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

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US29529A (en) *		1860-08-07		Machine eoe
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
BE753495A (fr) *	1969-07-21	1970-12-16	Dolby Laboratories Inc	Filtres limiteurs perfectionnes pour systemes attenuateurs de bruit. (
US3548334A (en) *	1969-07-28	1970-12-15	Matsushita Electric Ind Co Ltd	Noise reduction circuit and system

1971
- 1971-05-04 NL NL7106040.A patent/NL163388C/nl not_active IP Right Cessation
1972
- 1972-04-22 DE DE2219794A patent/DE2219794C3/de not_active Expired
- 1972-04-25 US US00247264A patent/US3818362A/en not_active Expired - Lifetime
- 1972-04-29 IT IT23749/72A patent/IT953872B/it active
- 1972-05-01 GB GB2010372A patent/GB1393152A/en not_active Expired
- 1972-05-01 JP JP47043596A patent/JPS5238691B1/ja active Pending
- 1972-05-01 CA CA140,937A patent/CA946485A/en not_active Expired
- 1972-05-01 AU AU41715/72A patent/AU465461B2/en not_active Expired
- 1972-05-03 AT AT383572A patent/AT334107B/de not_active IP Right Cessation
- 1972-05-04 FR FR727215913A patent/FR2135631B1/fr not_active Expired

Also Published As

Publication number	Publication date
GB1393152A (en)	1975-05-07
AU465461B2 (en)	1975-09-25
NL7106040A (nl)	1972-11-07
FR2135631B1 (nl)	1973-07-13
DE2219794B2 (nl)	1974-05-02
AU4171572A (en)	1973-11-08
IT953872B (it)	1973-08-10
NL163388B (nl)	1980-03-17
AT334107B (de)	1976-12-27
DE2219794A1 (de)	1972-11-30
JPS5238691B1 (nl)	1977-09-30
DE2219794C3 (de)	1974-12-05
NL163388C (nl)	1980-08-15
FR2135631A1 (nl)	1972-12-22
ATA383572A (de)	1976-04-15
US3818362A (en)	1974-06-18

Publication	Publication Date	Title
AU474945B2 (en)	1976-08-05	Integrated circuit
CA964594A (en)	1975-03-18	Muting circuit
CA942881A (en)	1974-02-26	Contrast compression circuits
CA957950A (en)	1974-11-19	Noise reduction system
CA1005512A (en)	1977-02-15	Interference suppression circuits
CA951386A (en)	1974-07-16	Amplifier circuit
CA1005513A (en)	1977-02-15	Interference suppression circuits
AU465461B2 (en)	1975-09-25	Noise reduction circuit
CA961555A (en)	1975-01-21	Gate circuit
CA930854A (en)	1973-07-24	Noise cancellation circuit
AU477183B2 (en)	1976-10-14	Solid state circuit
AU461163B2 (en)	1975-05-15	Track circuit
CA990398A (en)	1976-06-01	Noise suppression circuit
CA963975A (en)	1975-03-04	Integrating circuit
CA950575A (en)	1974-07-02	Noise rejection circuit
AU4603472A (en)	1974-03-07	Solid state circuit
AU443310B2 (en)	1973-12-20	Amplifier circuit
CA954452A (en)	1974-09-10	Latching circuit
CA961132A (en)	1975-01-14	Commutating circuit
CA888940A (en)	1971-12-21	Noise rejection circuit
CA888946A (en)	1971-12-21	Comparison circuit
CA866954A (en)	1971-03-23	Circuit component
CA875728A (en)	1971-07-13	Frequency-doubler circuit
CA881775A (en)	1971-09-21	Integrated circuit
AU463080B2 (en)	1975-06-27	Circuit arrangement