CA1131355A - Signal processing circuit - Google Patents
Signal processing circuitInfo
- Publication number
- CA1131355A CA1131355A CA336,032A CA336032A CA1131355A CA 1131355 A CA1131355 A CA 1131355A CA 336032 A CA336032 A CA 336032A CA 1131355 A CA1131355 A CA 1131355A
- Authority
- CA
- Canada
- Prior art keywords
- frequency
- signals
- low
- pass filter
- input
- 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
- 238000012545 processing Methods 0.000 title claims abstract description 22
- 238000001228 spectrum Methods 0.000 claims abstract description 21
- 230000004044 response Effects 0.000 claims description 36
- 239000003990 capacitor Substances 0.000 claims description 14
- 230000005236 sound signal Effects 0.000 abstract description 25
- 238000001914 filtration Methods 0.000 abstract 2
- 238000000034 method Methods 0.000 description 10
- 230000009467 reduction Effects 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000003127 knee Anatomy 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000019491 signal transduction Effects 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000002730 additional effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G5/00—Tone control or bandwidth control in amplifiers
- H03G5/16—Automatic control
- H03G5/18—Automatic control in untuned amplifiers
- H03G5/22—Automatic control in untuned amplifiers having semiconductor devices
Landscapes
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Networks Using Active Elements (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP116828/78 | 1978-09-22 | ||
| JP11682878A JPS5545112A (en) | 1978-09-22 | 1978-09-22 | Signal transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1131355A true CA1131355A (en) | 1982-09-07 |
Family
ID=14696623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA336,032A Expired CA1131355A (en) | 1978-09-22 | 1979-09-20 | Signal processing circuit |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4306201A (en, 2012) |
| JP (1) | JPS5545112A (en, 2012) |
| CA (1) | CA1131355A (en, 2012) |
| DE (1) | DE2938378A1 (en, 2012) |
| FR (1) | FR2437118B1 (en, 2012) |
| GB (1) | GB2032230B (en, 2012) |
| NL (1) | NL7907014A (en, 2012) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69227681T2 (de) * | 1992-07-31 | 1999-06-10 | Aphex Systems, Ltd., Sun Valley, Calif. | Anordnung zur Anhebung der Bassfrequenz eines Audiosignals |
| JP3616878B2 (ja) * | 2002-01-17 | 2005-02-02 | オンキヨー株式会社 | 低域通過フィルタ |
| US9218847B2 (en) * | 2013-12-18 | 2015-12-22 | HGST Netherlands B.V. | System and method for testing data storage systems utilizing micro-transitions |
| US8885275B1 (en) * | 2013-12-18 | 2014-11-11 | HGST Netherlands B.V. | System and method for ATI/FTI detection in magnetic media |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE232937C (en, 2012) * | ||||
| GB479070A (en) | 1936-08-06 | 1938-01-31 | Electrical Res Prod Inc | Improvements in or relating to multiple track sound-film recording |
| US2395159A (en) * | 1942-06-29 | 1946-02-19 | Rca Corp | Electrical compressor method and system |
| GB1120541A (en) | 1965-08-11 | 1968-07-17 | Dolby Ray Milton | Improvements in noise reduction systems |
| GB1115015A (en) * | 1966-03-01 | 1968-05-22 | Rank Organisation Ltd | Improvements in or relating to automatic bandwidth adjustment of an audio frequency signal |
| BE753495A (fr) * | 1969-07-21 | 1970-12-16 | Dolby Laboratories Inc | Filtres limiteurs perfectionnes pour systemes attenuateurs de bruit. ( |
| GB1367002A (en) | 1971-04-06 | 1974-09-18 | Victor Company Of Japan | Compression and/or expansion system and circuit |
| JPS5648883B1 (en, 2012) | 1971-07-24 | 1981-11-18 | ||
| JPS574492Y2 (en, 2012) | 1972-05-13 | 1982-01-27 | ||
| JPS5024112U (en, 2012) | 1973-06-28 | 1975-03-18 | ||
| NO142768C (no) | 1974-01-26 | 1980-10-08 | Licentia Gmbh | Kopling for automatisk dynamikk-kompresjon eller -ekspansjon |
| JPS51127608A (en) * | 1975-04-30 | 1976-11-06 | Victor Co Of Japan Ltd | Signal transmitting unit |
| JPS52142409A (en) * | 1976-05-21 | 1977-11-28 | Toshiba Corp | Noise reduction system |
| JPS5912746Y2 (ja) * | 1976-10-30 | 1984-04-17 | 赤井電機株式会社 | テ−プレコ−ダ等におけるノイズ低減装置 |
| JPS5439516A (en) | 1977-09-02 | 1979-03-27 | Sanyo Electric Co Ltd | Noise reduction unit |
-
1978
- 1978-09-22 JP JP11682878A patent/JPS5545112A/ja active Granted
-
1979
- 1979-09-20 US US06/077,179 patent/US4306201A/en not_active Expired - Lifetime
- 1979-09-20 NL NL7907014A patent/NL7907014A/nl not_active Application Discontinuation
- 1979-09-20 CA CA336,032A patent/CA1131355A/en not_active Expired
- 1979-09-21 GB GB7932846A patent/GB2032230B/en not_active Expired
- 1979-09-22 DE DE19792938378 patent/DE2938378A1/de not_active Withdrawn
- 1979-09-24 FR FR7923728A patent/FR2437118B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2938378A1 (de) | 1980-04-03 |
| US4306201A (en) | 1981-12-15 |
| FR2437118B1 (fr) | 1985-06-28 |
| GB2032230A (en) | 1980-04-30 |
| GB2032230B (en) | 1982-10-13 |
| NL7907014A (nl) | 1980-03-25 |
| JPS5545112A (en) | 1980-03-29 |
| FR2437118A1 (fr) | 1980-04-18 |
| JPS6136304B2 (en, 2012) | 1986-08-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |