IT1135197B - Circuito di riduzione del rumore,particolarmente utile per apparati di registrazione/riproduzione - Google Patents

Circuito di riduzione del rumore,particolarmente utile per apparati di registrazione/riproduzione

Info

Publication number: IT1135197B
Authority: IT; Italy
Prior art keywords: recording; particularly useful; noise reduction; reduction circuit; reproduction equipment
Prior art date: 1980-01-28

Application number

IT19361/81A

Other languages

English (en)

Other versions

IT8119361A0 (it

Inventor

Kenzo Akagiri

Original Assignee

Sony Corp

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.)

1980-01-28

Filing date

1981-01-27

Publication date

1986-08-20

1981-01-27 Application filed by Sony Corp filed Critical Sony Corp

1981-01-27 Publication of IT8119361A0 publication Critical patent/IT8119361A0/it

1986-08-20 Application granted granted Critical

1986-08-20 Publication of IT1135197B publication Critical patent/IT1135197B/it

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
- H03G9/025—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers frequency-dependent volume compression or expansion, e.g. multiple-band systems
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
- H03G11/02—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general by means of diodes

IT19361/81A 1980-01-28 1981-01-27 Circuito di riduzione del rumore,particolarmente utile per apparati di registrazione/riproduzione IT1135197B (it)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
JP859280A JPS56106433A (en)	1980-01-28	1980-01-28	Noise reducing circuit

Publications (2)

Publication Number	Publication Date
IT8119361A0 IT8119361A0 (it)	1981-01-27
IT1135197B true IT1135197B (it)	1986-08-20

Family

ID=11697247

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IT19361/81A IT1135197B (it)	1980-01-28	1981-01-27	Circuito di riduzione del rumore,particolarmente utile per apparati di registrazione/riproduzione

Country Status (12)

Country	Link
US (1)	US4471318A (it)
JP (1)	JPS56106433A (it)
AT (1)	AT385158B (it)
AU (1)	AU539234B2 (it)
BE (1)	BE887243A (it)
CA (1)	CA1158171A (it)
CH (1)	CH656994A5 (it)
DE (1)	DE3102802C2 (it)
FR (1)	FR2481500B1 (it)
GB (1)	GB2068697B (it)
IT (1)	IT1135197B (it)
NL (1)	NL8100351A (it)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS56157111A (en) *	1980-05-08	1981-12-04	Pioneer Electronic Corp	Dynamic range changing circuit for input signal
JPS5746517A (en) *	1980-09-03	1982-03-17	Sony Corp	Noise reduction circuit
US5220468A (en) *	1982-05-10	1993-06-15	Digital Equipment Corporation	Disk drive with constant bandwidth automatic gain control
US4801890A (en) *	1985-06-17	1989-01-31	Dolby Ray Milton	Circuit arrangements for modifying dynamic range using variable combining techniques
JPH0510409Y2 (it) *	1987-08-31	1993-03-15
JPH0315776U (it) *	1989-06-29	1991-02-18
US6731815B1 (en) *	2000-03-03	2004-05-04	Tektronix, Inc.	Human vision based pre-processing for MPEG video compression
WO2004055997A1 (en) *	2002-12-16	2004-07-01	Koninklijke Philips Electronics N.V.	Noise suppression in an fm receiver
DE102004059199A1 (de) †	2004-07-02	2006-02-09	OKM Ortungstechnik Krauß & Müller GmbH	Anordnung zum Betreiben eines geophysikalischen Ortungsgeräts
JP4813189B2 (ja) *	2006-01-23	2011-11-09	株式会社リコー	高調波抑制回路

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1204704C2 (de) *	1961-09-04	1973-09-20		Verfahren und einrichtung zur verringerung des einflusses von stoersignalen, die einem breitbandigen nachrichtensignal bei einer uebertragung oder einem aufzeichnungs- und wiedergabevorgang ueberlagert werden
NL293818A (it) *	1962-06-07
US3846719A (en) *	1973-09-13	1974-11-05	Dolby Laboratories Inc	Noise reduction systems
GB1305622A (it) *	1969-07-21	1973-02-07
GB1390341A (en) *	1971-03-12	1975-04-09	Dolby Laboratories Inc	Signal compressors and expanders
US3789143A (en) *	1971-03-29	1974-01-29	D Blackmer	Compander with control signal logarithmically related to the instantaneous rms value of the input signal
US3795876A (en) *	1971-04-06	1974-03-05	Victor Company Of Japan	Compression and/or expansion system and circuit
GB1425172A (en) *	1972-04-04	1976-02-18	Dolby Laboratories Inc	Circuits for the danamic range of a signal
GB1432763A (en) *	1972-05-02	1976-04-22	Dolby Laboratories Inc	Compressors expanders and noise reduction systems
GB1438711A (en) *	1973-01-23	1976-06-09	Dolby Laboratories Inc	Calibration oscillators for noise reduction systems
GB1473833A (en) *	1973-05-17	1977-05-18	Dolby Laboratories Inc	Circuit for the dynamic range of a signal
NO142768C (no) *	1974-01-26	1980-10-08	Licentia Gmbh	Kopling for automatisk dynamikk-kompresjon eller -ekspansjon
US3902131A (en) *	1974-09-06	1975-08-26	Quadracast Systems	Tandem audio dynamic range expander
JPS52142409A (en) *	1976-05-21	1977-11-28	Toshiba Corp	Noise reduction system
JPS5439516A (en) *	1977-09-02	1979-03-27	Sanyo Electric Co Ltd	Noise reduction unit
US4327331A (en) *	1979-11-07	1982-04-27	Pioneer Electronic Corporation	Audio amplifier device

1980
- 1980-01-28 JP JP859280A patent/JPS56106433A/ja active Granted
1981
- 1981-01-16 CA CA000368660A patent/CA1158171A/en not_active Expired
- 1981-01-20 AU AU66359/81A patent/AU539234B2/en not_active Ceased
- 1981-01-21 US US06/226,821 patent/US4471318A/en not_active Expired - Fee Related
- 1981-01-22 GB GB8101907A patent/GB2068697B/en not_active Expired
- 1981-01-26 NL NL8100351A patent/NL8100351A/nl not_active Application Discontinuation
- 1981-01-27 IT IT19361/81A patent/IT1135197B/it active
- 1981-01-27 BE BE2/58975A patent/BE887243A/fr not_active IP Right Cessation
- 1981-01-28 FR FR8101637A patent/FR2481500B1/fr not_active Expired
- 1981-01-28 AT AT0035681A patent/AT385158B/de not_active IP Right Cessation
- 1981-01-28 CH CH533/81A patent/CH656994A5/de not_active IP Right Cessation
- 1981-01-28 DE DE3102802A patent/DE3102802C2/de not_active Expired - Fee Related

Also Published As

Publication number	Publication date
JPS6232849B2 (it)	1987-07-17
US4471318A (en)	1984-09-11
JPS56106433A (en)	1981-08-24
GB2068697B (en)	1984-08-08
AU539234B2 (en)	1984-09-20
DE3102802A1 (de)	1981-12-17
BE887243A (fr)	1981-05-14
IT8119361A0 (it)	1981-01-27
GB2068697A (en)	1981-08-12
FR2481500B1 (fr)	1986-08-22
CH656994A5 (de)	1986-07-31
ATA35681A (de)	1987-07-15
FR2481500A1 (fr)	1981-10-30
DE3102802C2 (de)	1993-10-14
AT385158B (de)	1988-02-25
NL8100351A (nl)	1981-08-17
CA1158171A (en)	1983-12-06
AU6635981A (en)	1981-08-06

Publication	Publication Date	Title
NO163836C (no)	1990-07-25	Baandkassett.
IT8124135A0 (it)	1981-09-24	Apparato riproduttore di dischi.
NO163797C (no)	1990-07-18	Baandkassett.
NO160236C (no)	1989-03-22	Baandkassett.
IT8224714A0 (it)	1982-12-13	Apparato magnetico di registrazione.
NL188714C (nl)	1992-09-01	Magnetisch registreermedium.
IT8168305A0 (it)	1981-10-08	Cassetta porta nastro per macchine per scrivere
DE3382104D1 (de)	1991-02-14	Videosignal-aufzeichnungsgeraet.
IT8324068A0 (it)	1983-12-06	Cassetta di nastro magnetico.
IT8220324A0 (it)	1982-03-22	Apparato di riproduzione.
IT1135197B (it)	1986-08-20	Circuito di riduzione del rumore,particolarmente utile per apparati di registrazione/riproduzione
FR2504341B1 (fr)	1987-06-05	Circuit de reproduction de donnees
DE3483290D1 (de)	1990-10-31	Magnetisches wiedergabegeraet.
DE3486358D1 (de)	1994-12-22	Aufnahme-Plattenkassette.
DE3382110D1 (de)	1991-02-21	Videobandaufzeichnungsgeraet.
DE3381692D1 (de)	1990-08-02	Videoband-aufzeichnungsgeraet.
FI842498A0 (fi)	1984-06-20	Anordning foer en videobandskasset avsedd foer uthyrning.
IT8323527A0 (it)	1983-10-28	Apparecchiatura di registrazione magnetica.
IT8123755A0 (it)	1981-09-02	Circuito di riduzione del rumore.
IT8122140A0 (it)	1981-06-04	Apparato di riproduzione di segnali video.
NL192702B (nl)	1997-08-01	Magnetisch registratiemedium.
DE3483414D1 (de)	1990-11-22	Bandkassette.
IT8122412A0 (it)	1981-06-18	Apparecchiatura per circuito di elaborazione audio di linee di abbonato.
IT8119839A0 (it)	1981-02-18	Circuito di registrazione riproduzione.
NO853028L (no)	1985-07-30	System for lydgjengivelse.