JPS5238691B1 - - Google Patents
Info
- Publication number
- JPS5238691B1 JPS5238691B1 JP47043596A JP4359672A JPS5238691B1 JP S5238691 B1 JPS5238691 B1 JP S5238691B1 JP 47043596 A JP47043596 A JP 47043596A JP 4359672 A JP4359672 A JP 4359672A JP S5238691 B1 JPS5238691 B1 JP S5238691B1
- Authority
- JP
- Japan
- 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
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)
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 |
|---|---|
| JPS5238691B1 true JPS5238691B1 (enExample) | 1977-09-30 |
Family
ID=19813073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP47043596A Pending JPS5238691B1 (enExample) | 1971-05-04 | 1972-05-01 |
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) |
Families Citing this family (12)
| 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 |
| 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)
| 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 |
-
1971
- 1971-05-04 NL NL7106040.A patent/NL163388C/xx 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 CA CA140,937A patent/CA946485A/en not_active Expired
- 1972-05-01 AU AU41715/72A patent/AU465461B2/en not_active Expired
- 1972-05-01 JP JP47043596A patent/JPS5238691B1/ja active Pending
- 1972-05-01 GB GB2010372A patent/GB1393152A/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 |
|---|---|
| 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 |
| GB1393152A (en) | 1975-05-07 |
| US3818362A (en) | 1974-06-18 |
| NL163388C (nl) | 1980-08-15 |
| NL163388B (nl) | 1980-03-17 |
| IT953872B (it) | 1973-08-10 |
| DE2219794B2 (enExample) | 1974-05-02 |
| CA946485A (en) | 1974-04-30 |
| AU465461B2 (en) | 1975-09-25 |