GB1431481A - Circuit arrangement having an amplitude and frequency dependent transfer function - Google Patents
Circuit arrangement having an amplitude and frequency dependent transfer functionInfo
- Publication number
- GB1431481A GB1431481A GB1458973A GB1458973A GB1431481A GB 1431481 A GB1431481 A GB 1431481A GB 1458973 A GB1458973 A GB 1458973A GB 1458973 A GB1458973 A GB 1458973A GB 1431481 A GB1431481 A GB 1431481A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplitude
- impedance
- transistor
- circuit
- 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
- 230000001419 dependent effect Effects 0.000 title abstract 3
- 230000000295 complement effect Effects 0.000 abstract 2
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000005236 sound signal Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/24—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing noise
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/0007—Circuits or methods for reducing noise, for correction of distortion, or for changing density of recorded information
-
- 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
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Networks Using Active Elements (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Television Signal Processing For Recording (AREA)
- Dc Digital Transmission (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7204290A NL7204290A (xx) | 1972-03-30 | 1972-03-30 | |
NL7301752A NL7301752A (xx) | 1973-02-08 | 1973-02-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1431481A true GB1431481A (en) | 1976-04-07 |
Family
ID=26644756
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1458973A Expired GB1431481A (en) | 1972-03-30 | 1973-03-27 | Circuit arrangement having an amplitude and frequency dependent transfer function |
Country Status (12)
Country | Link |
---|---|
JP (1) | JPS5649008B2 (xx) |
AR (1) | AR195708A1 (xx) |
AT (1) | AT346906B (xx) |
BE (1) | BE797480A (xx) |
CA (1) | CA975439A (xx) |
CH (1) | CH561488A5 (xx) |
DE (1) | DE2312086C3 (xx) |
ES (1) | ES413099A1 (xx) |
FR (1) | FR2178108B1 (xx) |
GB (1) | GB1431481A (xx) |
IT (1) | IT980703B (xx) |
SE (1) | SE388988B (xx) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4445054A (en) * | 1980-09-29 | 1984-04-24 | Tokyo Shibaura Denki Kabushiki Kaisha | Full-wave rectifying circuit |
EP0330583A2 (fr) * | 1988-02-26 | 1989-08-30 | L'oreal | Méthode pour améliorer l'aspect esthétique de la peau à l'aide de mélanges polyvitaminiques et compositions cosmétiques pour sa mise en oeuvre |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1000617A (en) * | 1973-05-17 | 1976-11-30 | Ray M. Dolby | Compressors, expanders and noise reduction systems |
NL7413514A (nl) * | 1974-10-15 | 1976-04-21 | Philips Nv | Inrichting voor het naar keuze realiseren van twee onderling komplementaire funkties. |
JPS55156431A (en) * | 1979-05-24 | 1980-12-05 | Sony Corp | Noise reduction system |
JPH0483548A (ja) * | 1990-07-24 | 1992-03-17 | Masaya Koyama | 泡立機及び泡立容器 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2730576A (en) * | 1951-09-17 | 1956-01-10 | Bell Telephone Labor Inc | Miniaturized transistor amplifier circuit |
GB920723A (en) * | 1960-07-07 | 1963-03-13 | Ass Elect Ind | Amplifier circuit |
US3368158A (en) * | 1965-05-14 | 1968-02-06 | Bell Telephone Labor Inc | Low-level automatic gain control circuitry |
US3444474A (en) * | 1965-12-10 | 1969-05-13 | Bell Telephone Labor Inc | Active equalizer circuit |
JPS576341B2 (xx) * | 1972-08-23 | 1982-02-04 |
-
1973
- 1973-03-10 DE DE19732312086 patent/DE2312086C3/de not_active Expired
- 1973-03-19 AR AR24711073A patent/AR195708A1/es active
- 1973-03-21 CA CA166,658A patent/CA975439A/en not_active Expired
- 1973-03-27 CH CH441973A patent/CH561488A5/xx not_active IP Right Cessation
- 1973-03-27 GB GB1458973A patent/GB1431481A/en not_active Expired
- 1973-03-27 IT IT6787773A patent/IT980703B/it active
- 1973-03-27 SE SE7304271A patent/SE388988B/xx unknown
- 1973-03-28 BE BE129400A patent/BE797480A/xx unknown
- 1973-03-28 ES ES413099A patent/ES413099A1/es not_active Expired
- 1973-03-28 AT AT270873A patent/AT346906B/de not_active IP Right Cessation
- 1973-03-28 FR FR7311127A patent/FR2178108B1/fr not_active Expired
- 1973-03-29 JP JP3614873A patent/JPS5649008B2/ja not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4445054A (en) * | 1980-09-29 | 1984-04-24 | Tokyo Shibaura Denki Kabushiki Kaisha | Full-wave rectifying circuit |
EP0330583A2 (fr) * | 1988-02-26 | 1989-08-30 | L'oreal | Méthode pour améliorer l'aspect esthétique de la peau à l'aide de mélanges polyvitaminiques et compositions cosmétiques pour sa mise en oeuvre |
EP0330583A3 (fr) * | 1988-02-26 | 1991-03-13 | L'oreal | Méthode pour améliorer l'aspect esthétique de la peau à l'aide de mélanges polyvitaminiques et compositions cosmétiques pour sa mise en oeuvre |
Also Published As
Publication number | Publication date |
---|---|
JPS4910010A (xx) | 1974-01-29 |
SE388988B (sv) | 1976-10-18 |
FR2178108A1 (xx) | 1973-11-09 |
IT980703B (it) | 1974-10-10 |
DE2312086A1 (de) | 1973-10-31 |
AT346906B (de) | 1978-12-11 |
AR195708A1 (es) | 1973-10-31 |
ATA270873A (de) | 1978-04-15 |
JPS5649008B2 (xx) | 1981-11-19 |
DE2312086B2 (de) | 1979-03-22 |
DE2312086C3 (de) | 1979-10-31 |
ES413099A1 (es) | 1976-01-16 |
CA975439A (en) | 1975-09-30 |
BE797480A (fr) | 1973-09-28 |
CH561488A5 (xx) | 1975-04-30 |
FR2178108B1 (xx) | 1976-05-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |