IT1135216B - NOISE REDUCTION CIRCUIT - Google Patents

NOISE REDUCTION CIRCUIT

Info

Publication number: IT1135216B
Authority: IT; Italy
Prior art keywords: noise reduction; reduction circuit; circuit; noise; reduction
Prior art date: 1980-01-30

Application number

IT19388/81A

Other languages

Italian (it)

Other versions

IT8119388A0 (en

Inventor

Akagiri Kenzo

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.)

1980-01-30

Filing date

1981-01-28

Publication date

1986-08-20

1981-01-28 Application filed by Sony Corp filed Critical Sony Corp

1981-01-28 Publication of IT8119388A0 publication Critical patent/IT8119388A0/en

1986-08-20 Application granted granted Critical

1986-08-20 Publication of IT1135216B publication Critical patent/IT1135216B/en

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
- H03G9/025—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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Signal Processing (AREA)
Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Noise Elimination (AREA)
Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)

IT19388/81A 1980-01-30 1981-01-28 NOISE REDUCTION CIRCUIT IT1135216B (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
JP985780A JPS56107648A (en)	1980-01-30	1980-01-30	Noise reduction circuit

Publications (2)

Publication Number	Publication Date
IT8119388A0 IT8119388A0 (en)	1981-01-28
IT1135216B true IT1135216B (en)	1986-08-20

Family

ID=11731797

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IT19388/81A IT1135216B (en)	1980-01-30	1981-01-28	NOISE REDUCTION CIRCUIT

Country Status (11)

Country	Link
JP (1)	JPS56107648A (en)
AT (1)	AT381194B (en)
AU (1)	AU539233B2 (en)
BE (1)	BE887278A (en)
CA (1)	CA1158172A (en)
CH (1)	CH657485A5 (en)
DE (1)	DE3103237C2 (en)
FR (1)	FR2474736A1 (en)
GB (1)	GB2068197B (en)
IT (1)	IT1135216B (en)
NL (1)	NL8100412A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4490691A (en) *	1980-06-30	1984-12-25	Dolby Ray Milton	Compressor-expander circuits and, circuit arrangements for modifying dynamic range, for suppressing mid-frequency modulation effects and for reducing media overload
JPH0775103B2 (en) *	1987-05-13	1995-08-09	三菱電機株式会社	Noise reduction circuit
US5424881A (en)	1993-02-01	1995-06-13	Cirrus Logic, Inc.	Synchronous read channel

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3846719A (en) *	1973-09-13	1974-11-05	Dolby Laboratories Inc	Noise reduction systems
US3678416A (en) *	1971-07-26	1972-07-18	Richard S Burwen	Dynamic noise filter having means for varying cutoff point
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
GB1367002A (en) *	1971-04-06	1974-09-18	Victor Company Of Japan	Compression and/or expansion system and circuit
US3732371A (en) *	1971-05-10	1973-05-08	Richard S Burwen	Wide dynamic range noise masking compandor
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
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
JPS53121506A (en) *	1977-03-31	1978-10-24	Pioneer Electronic Corp	Signal compressing and expanding device
JPS5439516A (en) *	1977-09-02	1979-03-27	Sanyo Electric Co Ltd	Noise reduction unit

1980
- 1980-01-30 JP JP985780A patent/JPS56107648A/en active Granted
1981
- 1981-01-16 CA CA000368692A patent/CA1158172A/en not_active Expired
- 1981-01-20 AU AU66358/81A patent/AU539233B2/en not_active Ceased
- 1981-01-22 GB GB8101908A patent/GB2068197B/en not_active Expired
- 1981-01-27 FR FR8101527A patent/FR2474736A1/en active Granted
- 1981-01-28 AT AT0035781A patent/AT381194B/en not_active IP Right Cessation
- 1981-01-28 NL NL8100412A patent/NL8100412A/en not_active Application Discontinuation
- 1981-01-28 IT IT19388/81A patent/IT1135216B/en active
- 1981-01-29 BE BE2/58985A patent/BE887278A/en not_active IP Right Cessation
- 1981-01-29 CH CH579/81A patent/CH657485A5/en not_active IP Right Cessation
- 1981-01-30 DE DE3103237A patent/DE3103237C2/en not_active Expired - Fee Related

Also Published As

Publication number	Publication date
CH657485A5 (en)	1986-08-29
AT381194B (en)	1986-09-10
BE887278A (en)	1981-05-14
JPS6232850B2 (en)	1987-07-17
FR2474736A1 (en)	1981-07-31
FR2474736B1 (en)	1984-11-23
CA1158172A (en)	1983-12-06
IT8119388A0 (en)	1981-01-28
ATA35781A (en)	1986-01-15
GB2068197A (en)	1981-08-05
NL8100412A (en)	1981-09-01
AU539233B2 (en)	1984-09-20
DE3103237C2 (en)	1993-10-14
DE3103237A1 (en)	1981-12-03
GB2068197B (en)	1984-08-08
AU6635881A (en)	1981-08-06
JPS56107648A (en)	1981-08-26

Legal Events

Date	Code	Title	Description
1999-10-27	TA	Fee payment date (situation as of event date), data collected since 19931001	Effective date: 19940129

Publication	Publication Date	Title
FI811744L (en)	1981-12-07	Circuit arrangement
IT8323550A0 (en)	1983-10-31	INTERFACE CIRCUIT.
FR2491188B1 (en)	1986-05-23	QUIET
FI833220A (en)	1984-05-23	FOERFARANDE FOER ATT UPPNAO EN TVAO- ELLER TREDIMENSIONELL BILD AV KEMISKA OEVERGAONGAR.
IT1171766B (en)	1987-06-10	CATHETER
IT8321325A0 (en)	1983-05-26	CALL COMPLETION CIRCUIT.
FR2491322B1 (en)	1986-08-29	DISHWASHER
BR8002141A (en)	1980-11-25	NOISE BLOCKING CIRCUIT
IT8224720A0 (en)	1982-12-13	DEMULTIPLATOR CIRCUIT.
IT1138559B (en)	1986-09-17	NOISE REDUCTION CIRCUIT
BR8205190A (en)	1983-08-16	SYNCHRONIZER-SUPERVISOR CIRCUIT
IT1138883B (en)	1986-09-17	GAIN CONTROL CIRCUIT
IT1206117B (en)	1989-04-14	DEMULTIPLATOR CIRCUIT.
FR2481500B1 (en)	1986-08-22	NOISE REDUCTION CIRCUIT
FR2483516B1 (en)	1986-12-12	QUIET
FI811873L (en)	1981-12-28	Circuit arrangement
IT1169233B (en)	1987-05-27	AMPLIFIER CIRCUIT
IT1135216B (en)	1986-08-20	NOISE REDUCTION CIRCUIT
AT388492B (en)	1989-06-26	DRAWER
IT1167463B (en)	1987-05-13	COMBINATION ABSORBENT DIALIZER
BR8104634A (en)	1982-04-06	CIRCUIT ARRANGEMENT
IT1168612B (en)	1987-05-20	IMPULSES CIRCUIT
IT1139998B (en)	1986-09-24	ELECTRIC CONDENSER
BR8104670A (en)	1982-04-06	CIRCUIT ARRANGEMENT
BR8106570A (en)	1982-06-29	CIRCUIT ARRANGEMENT