GB1393152A - Noise reduction circuit - Google Patents

Noise reduction circuit

Info

Publication number
GB1393152A
GB1393152A GB2010372A GB2010372A GB1393152A GB 1393152 A GB1393152 A GB 1393152A GB 2010372 A GB2010372 A GB 2010372A GB 2010372 A GB2010372 A GB 2010372A GB 1393152 A GB1393152 A GB 1393152A
Authority
GB
United Kingdom
Prior art keywords
pass filter
transfer function
paths
circuit
stage
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
GB2010372A
Other languages
English (en)
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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 Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1393152A publication Critical patent/GB1393152A/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

Landscapes

  • Networks Using Active Elements (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Noise Elimination (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
GB2010372A 1971-05-04 1972-05-01 Noise reduction circuit Expired GB1393152A (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
GB1393152A true GB1393152A (en) 1975-05-07

Family

ID=19813073

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2010372A Expired GB1393152A (en) 1971-05-04 1972-05-01 Noise reduction circuit

Country Status (10)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0106368A1 (en) * 1982-10-20 1984-04-25 Hitachi, Ltd. Noise reduction circuit arrangement of solid-state video camera
GB2319444A (en) * 1996-11-09 1998-05-20 Samsung Electronics Co Ltd Compensating frequency characteristic of audio signal
CN109191387A (zh) * 2018-07-20 2019-01-11 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

Families Citing this family (9)

* 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
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

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

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0106368A1 (en) * 1982-10-20 1984-04-25 Hitachi, Ltd. Noise reduction circuit arrangement of solid-state video camera
GB2319444A (en) * 1996-11-09 1998-05-20 Samsung Electronics Co Ltd Compensating frequency characteristic of audio signal
GB2319444B (en) * 1996-11-09 1998-12-16 Samsung Electronics Co Ltd Apparatus for compensating frequency characteristic of reproduction audio signal
US5881157A (en) * 1996-11-09 1999-03-09 Samsung Electronics Co., Ltd. Apparatus for compensating a frequency characteristic of a reproduction audio signal
CN109191387A (zh) * 2018-07-20 2019-01-11 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
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

Also Published As

Publication number Publication date
FR2135631A1 (enExample) 1972-12-22
FR2135631B1 (enExample) 1973-07-13
ATA383572A (de) 1976-04-15
AU4171572A (en) 1973-11-08
NL7106040A (enExample) 1972-11-07
AT334107B (de) 1976-12-27
DE2219794C3 (de) 1974-12-05
DE2219794A1 (de) 1972-11-30
US3818362A (en) 1974-06-18
NL163388C (nl) 1980-08-15
NL163388B (nl) 1980-03-17
JPS5238691B1 (enExample) 1977-09-30
IT953872B (it) 1973-08-10
DE2219794B2 (enExample) 1974-05-02
CA946485A (en) 1974-04-30
AU465461B2 (en) 1975-09-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee