GB1398733A - Variable filter - Google Patents
Variable filterInfo
- Publication number
- GB1398733A GB1398733A GB4724574A GB4724574A GB1398733A GB 1398733 A GB1398733 A GB 1398733A GB 4724574 A GB4724574 A GB 4724574A GB 4724574 A GB4724574 A GB 4724574A GB 1398733 A GB1398733 A GB 1398733A
- Authority
- GB
- United Kingdom
- Prior art keywords
- series circuit
- variable filter
- july
- capacitor
- pair
- 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
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)
- Amplifiers (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Noise Elimination (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Abstract
1398733 Dynamic noise limiters; active filters; adjustable filters SONY CORP 24 July 1972 [24 July 1971] 47245/74 Divided out of 1398732 Headings H4R and H3U A variable filter for a signal processing system such as described in Specification 1,398,732 comprises a pair of input terminals, first and second capacitors connected in a first series circuit across the input terminals, a third capacitor and a voltage responsive controllable impedance connected in series therewith to form a second series circuit the second series circuit being connected in parallel with the second capacitor; and a pair of output terminals connected to the ends of the second series circuit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5552971A JPS5648883B1 (en) | 1971-07-24 | 1971-07-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1398733A true GB1398733A (en) | 1975-06-25 |
Family
ID=13001242
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4724574A Expired GB1398733A (en) | 1971-07-24 | 1972-07-24 | Variable filter |
| GB3453572A Expired GB1398732A (en) | 1971-07-24 | 1972-07-24 | Signal processing system |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3453572A Expired GB1398732A (en) | 1971-07-24 | 1972-07-24 | Signal processing system |
Country Status (16)
| Country | Link |
|---|---|
| JP (1) | JPS5648883B1 (en) |
| AT (1) | AT351826B (en) |
| AU (1) | AU476805B2 (en) |
| BE (1) | BE786629A (en) |
| CA (1) | CA997276A (en) |
| CH (1) | CH577770A5 (en) |
| DE (1) | DE2236173C3 (en) |
| DK (1) | DK146140C (en) |
| FR (1) | FR2147146B1 (en) |
| GB (2) | GB1398733A (en) |
| IT (1) | IT961650B (en) |
| MY (2) | MY7900107A (en) |
| NL (1) | NL175570C (en) |
| NO (1) | NO136325C (en) |
| SE (1) | SE388330B (en) |
| ZA (1) | ZA725084B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4263624A (en) * | 1978-12-12 | 1981-04-21 | Dolby Laboratories Licensing Corporation | Analog recording on magnetic media |
| DE3115683C2 (en) * | 1981-04-18 | 1983-07-28 | Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen | Circuit arrangement for delayed, automatic gain control |
| JPS6220405A (en) * | 1985-07-18 | 1987-01-29 | Pioneer Electronic Corp | Amplification degree adjusting circuit |
| DE202007006689U1 (en) | 2007-05-07 | 2008-09-18 | Hetal-Werke Franz Hettich Gmbh & Co. Kg | Drive device for a fitting |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE753495A (en) * | 1969-07-21 | 1970-12-16 | Dolby Laboratories Inc | PERFECTIONED LIMITER FILTERS FOR NOISE MITIGATION SYSTEMS. ( |
-
1971
- 1971-07-24 JP JP5552971A patent/JPS5648883B1/ja active Pending
-
1972
- 1972-07-21 SE SE7209612A patent/SE388330B/en unknown
- 1972-07-21 CA CA147,668A patent/CA997276A/en not_active Expired
- 1972-07-22 IT IT51694/72A patent/IT961650B/en active
- 1972-07-24 GB GB4724574A patent/GB1398733A/en not_active Expired
- 1972-07-24 FR FR7226619A patent/FR2147146B1/fr not_active Expired
- 1972-07-24 BE BE786629A patent/BE786629A/en not_active IP Right Cessation
- 1972-07-24 CH CH1103772A patent/CH577770A5/xx not_active IP Right Cessation
- 1972-07-24 AT AT636372A patent/AT351826B/en not_active IP Right Cessation
- 1972-07-24 NO NO2642/72A patent/NO136325C/en unknown
- 1972-07-24 DK DK365372A patent/DK146140C/en not_active IP Right Cessation
- 1972-07-24 NL NLAANVRAGE7210201,A patent/NL175570C/en not_active IP Right Cessation
- 1972-07-24 AU AU44907/72A patent/AU476805B2/en not_active Expired
- 1972-07-24 DE DE2236173A patent/DE2236173C3/en not_active Expired
- 1972-07-24 ZA ZA725084A patent/ZA725084B/en unknown
- 1972-07-24 GB GB3453572A patent/GB1398732A/en not_active Expired
-
1979
- 1979-12-30 MY MY107/79A patent/MY7900107A/en unknown
- 1979-12-30 MY MY106/79A patent/MY7900106A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AT351826B (en) | 1979-08-10 |
| DE2236173C3 (en) | 1982-02-11 |
| MY7900107A (en) | 1979-12-31 |
| SE388330B (en) | 1976-09-27 |
| JPS5648883B1 (en) | 1981-11-18 |
| IT961650B (en) | 1973-12-10 |
| AU4490772A (en) | 1974-01-31 |
| BE786629A (en) | 1972-11-16 |
| FR2147146B1 (en) | 1978-02-10 |
| NO136325B (en) | 1977-05-09 |
| DE2236173B2 (en) | 1981-06-19 |
| FR2147146A1 (en) | 1973-03-09 |
| NO136325C (en) | 1977-08-17 |
| NL175570B (en) | 1984-06-18 |
| CH577770A5 (en) | 1976-07-15 |
| CA997276A (en) | 1976-09-21 |
| DE2236173A1 (en) | 1973-02-08 |
| ZA725084B (en) | 1973-04-25 |
| DK146140B (en) | 1983-07-04 |
| AU476805B2 (en) | 1976-10-07 |
| DK146140C (en) | 1983-11-28 |
| MY7900106A (en) | 1979-12-31 |
| ATA636372A (en) | 1979-01-15 |
| NL175570C (en) | 1984-11-16 |
| GB1398732A (en) | 1975-06-25 |
| NL7210201A (en) | 1973-01-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PE20 | Patent expired after termination of 20 years |