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
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 (ja) | 1977-09-30 |
Family
ID=19813073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP47043596A Pending JPS5238691B1 (ja) | 1971-05-04 | 1972-05-01 |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US3818362A (ja) |
| JP (1) | JPS5238691B1 (ja) |
| AT (1) | AT334107B (ja) |
| AU (1) | AU465461B2 (ja) |
| CA (1) | CA946485A (ja) |
| DE (1) | DE2219794C3 (ja) |
| FR (1) | FR2135631B1 (ja) |
| GB (1) | GB1393152A (ja) |
| IT (1) | IT953872B (ja) |
| NL (1) | NL163388C (ja) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US29529A (en) * | 1860-08-07 | Machine eoe | ||
| 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 |
| BE753495A (fr) * | 1969-07-21 | 1970-12-16 | Dolby Laboratories Inc | Filtres limiteurs perfectionnes pour systemes attenuateurs de bruit. ( |
| US3548334A (en) * | 1969-07-28 | 1970-12-15 | Matsushita Electric Ind 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 JP JP47043596A patent/JPS5238691B1/ja active Pending
- 1972-05-01 GB GB2010372A patent/GB1393152A/en not_active Expired
- 1972-05-01 AU AU41715/72A patent/AU465461B2/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 |
|---|---|
| NL163388B (nl) | 1980-03-17 |
| AU4171572A (en) | 1973-11-08 |
| AT334107B (de) | 1976-12-27 |
| FR2135631A1 (ja) | 1972-12-22 |
| GB1393152A (en) | 1975-05-07 |
| FR2135631B1 (ja) | 1973-07-13 |
| CA946485A (en) | 1974-04-30 |
| AU465461B2 (en) | 1975-09-25 |
| NL163388C (nl) | 1980-08-15 |
| ATA383572A (de) | 1976-04-15 |
| DE2219794A1 (de) | 1972-11-30 |
| IT953872B (it) | 1973-08-10 |
| NL7106040A (ja) | 1972-11-07 |
| DE2219794B2 (ja) | 1974-05-02 |
| DE2219794C3 (de) | 1974-12-05 |
| US3818362A (en) | 1974-06-18 |