JPS5752239A - Noise reducing circuit - Google Patents

Noise reducing circuit

Info

Publication number: JPS5752239A
Authority: JP; Japan
Prior art keywords: gain; circuit; path; vca13; output
Prior art date: 1980-09-09
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.): Pending

Application number

JP55123966A

Other languages

English (en)

Inventor

Kenzo Akagiri

Masayuki Katakura

Motomi Okochi

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.)

Sony Corp

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.)

1980-09-09

Filing date

1980-09-09

Publication date

1982-03-27

1980-09-09 Application filed by Sony Corp filed Critical Sony Corp

1980-09-09 Priority to JP55123966A priority Critical patent/JPS5752239A/ja

1981-09-03 Priority to AU74928/81A priority patent/AU545802B2/en

1981-09-04 Priority to CA000385294A priority patent/CA1161561A/en

1981-09-07 Priority to GB8127034A priority patent/GB2083988B/en

1981-09-08 Priority to US06/300,432 priority patent/US4441084A/en

1981-09-09 Priority to NL8104171A priority patent/NL8104171A/nl

1981-09-09 Priority to DE19813135725 priority patent/DE3135725A1/de

1981-09-09 Priority to FR8117105A priority patent/FR2490038B1/fr

1982-03-27 Publication of JPS5752239A publication Critical patent/JPS5752239A/ja

Status Pending 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
- H03G9/025—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

Landscapes

Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

JP55123966A 1980-09-09 1980-09-09 Noise reducing circuit Pending JPS5752239A (en)

Priority Applications (8)

Application Number	Priority Date	Filing Date	Title
JP55123966A JPS5752239A (en)	1980-09-09	1980-09-09	Noise reducing circuit
AU74928/81A AU545802B2 (en)	1980-09-09	1981-09-03	Compander
CA000385294A CA1161561A (en)	1980-09-09	1981-09-04	Noise reduction circuit
GB8127034A GB2083988B (en)	1980-09-09	1981-09-07	Noise reduction circuits
US06/300,432 US4441084A (en)	1980-09-09	1981-09-08	Noise reduction circuit
NL8104171A NL8104171A (nl)	1980-09-09	1981-09-09	Ruisonderdrukkingsschakeling.
DE19813135725 DE3135725A1 (de)	1980-09-09	1981-09-09	Rauschverminderungsschaltung
FR8117105A FR2490038B1 (fr)	1980-09-09	1981-09-09	Reducteur de bruit notamment pour appareil d'enregistrement et de reproduction de signaux

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
JP55123966A JPS5752239A (en)	1980-09-09	1980-09-09	Noise reducing circuit

Publications (1)

Publication Number	Publication Date
JPS5752239A true JPS5752239A (en)	1982-03-27

Family

ID=14873724

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
JP55123966A Pending JPS5752239A (en)	1980-09-09	1980-09-09	Noise reducing circuit

Country Status (8)

Country	Link
US (1)	US4441084A (ja)
JP (1)	JPS5752239A (ja)
AU (1)	AU545802B2 (ja)
CA (1)	CA1161561A (ja)
DE (1)	DE3135725A1 (ja)
FR (1)	FR2490038B1 (ja)
GB (1)	GB2083988B (ja)
NL (1)	NL8104171A (ja)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4493091A (en) *	1982-05-05	1985-01-08	Dolby Laboratories Licensing Corporation	Analog and digital signal apparatus
US4507791A (en) *	1982-05-05	1985-03-26	Dolby Laboratories Licensing Corporation	Analog and digital signal apparatus
JPS6012858U (ja) *	1983-07-04	1985-01-28	日本ビクター株式会社	ノイズリダクシヨン回路
US4700361A (en) *	1983-10-07	1987-10-13	Dolby Laboratories Licensing Corporation	Spectral emphasis and de-emphasis
CA1309665C (en) *	1987-06-27	1992-11-03	Kenzo Akagiri	Amplitude compressing/expanding circuit
US5142164A (en) *	1990-03-26	1992-08-25	Illinois Institute Of Technology	Subharomic noise reduction circuit
US7230483B2 (en) *	2005-03-01	2007-06-12	Taiwan Semiconductor Manufacturing Co., Ltd.	Negative feedback system with an error compensation scheme
JP2011172189A (ja) *	2010-02-22	2011-09-01	On Semiconductor Trading Ltd	増幅回路

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3665345A (en) *	1969-07-21	1972-05-23	Dolby Laboratories Inc	Compressors and expanders for noise reduction systems
US3678416A (en) *	1971-07-26	1972-07-18	Richard S Burwen	Dynamic noise filter having means for varying cutoff point
US3848091A (en) *	1973-04-12	1974-11-12	Holmes J	Method of fitting a prosthetic device for providing corrections of auditory deficiencies in aurally handicapped persons
GB1515335A (en) *	1974-06-21	1978-06-21	Hitachi Ltd	Equalizer having variable attenuation
JPS5947489B2 (ja) *	1975-11-07	1984-11-19	株式会社日立製作所	カヘントウカキ
JPS53121506A (en) *	1977-03-31	1978-10-24	Pioneer Electronic Corp	Signal compressing and expanding device

1980
- 1980-09-09 JP JP55123966A patent/JPS5752239A/ja active Pending
1981
- 1981-09-03 AU AU74928/81A patent/AU545802B2/en not_active Ceased
- 1981-09-04 CA CA000385294A patent/CA1161561A/en not_active Expired
- 1981-09-07 GB GB8127034A patent/GB2083988B/en not_active Expired
- 1981-09-08 US US06/300,432 patent/US4441084A/en not_active Expired - Fee Related
- 1981-09-09 DE DE19813135725 patent/DE3135725A1/de not_active Withdrawn
- 1981-09-09 FR FR8117105A patent/FR2490038B1/fr not_active Expired
- 1981-09-09 NL NL8104171A patent/NL8104171A/nl not_active Application Discontinuation

Also Published As

Publication number	Publication date
AU545802B2 (en)	1985-08-01
GB2083988A (en)	1982-03-31
FR2490038A1 (fr)	1982-03-12
AU7492881A (en)	1982-03-18
NL8104171A (nl)	1982-04-01
US4441084A (en)	1984-04-03
FR2490038B1 (fr)	1988-12-02
CA1161561A (en)	1984-01-31
GB2083988B (en)	1984-06-20
DE3135725A1 (de)	1982-04-29

Publication	Publication Date	Title
JPS5717241A (en)	1982-01-28	Dynamic emphasis circuit
JPS55158715A (en)	1980-12-10	Gain control circuit
JPS5752239A (en)	1982-03-27	Noise reducing circuit
JPS54160150A (en)	1979-12-18	Frequency selecting circuit
JPS5746517A (en)	1982-03-17	Noise reduction circuit
JPS5752240A (en)	1982-03-27	Noise reducing circuit
JPS5752241A (en)	1982-03-27	Noise reducing circuit
JPS57194613A (en)	1982-11-30	Variable gain amplifying circuit
JPS5752242A (en)	1982-03-27	Noise reducing circuit
JPS5685944A (en)	1981-07-13	Wide band receiving circuit for optical communication
JPS5696518A (en)	1981-08-04	Tone control circuit
JPS5730408A (en)	1982-02-18	Feedback amplifier
JPS5443448A (en)	1979-04-06	Compressor
JPS56114407A (en)	1981-09-09	Power amplifier
JPS5742240A (en)	1982-03-09	Squeltch circuit
JPS5753129A (en)	1982-03-30	Active filter
JPS573409A (en)	1982-01-08	Agc circuit
JPS56106431A (en)	1981-08-24	Transistor of reduced carrier ssb signal
JPS57155841A (en)	1982-09-27	Noise reduction device
JPS56154835A (en)	1981-11-30	Noise reduction circuit
JPS555589A (en)	1980-01-16	Audio amplifying circuit
JPS57129529A (en)	1982-08-11	Semiconductor channel switch compensating circuit
JPS5745708A (en)	1982-03-15	Amplifying circuit
JPS5772405A (en)	1982-05-06	Frequency demodulating circuit
JPS6455971A (en)	1989-03-02	Noise reducing circuit