GB1398733A - Variable filter - Google Patents

Variable filter

Info

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
Application number
GB4724574A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Publication of GB1398733A publication Critical patent/GB1398733A/en
Expired legal-status Critical Current

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)
GB4724574A 1971-07-24 1972-07-24 Variable filter Expired GB1398733A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5552971A JPS5648883B1 (enExample) 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 (enExample)
AT (1) AT351826B (enExample)
AU (1) AU476805B2 (enExample)
BE (1) BE786629A (enExample)
CA (1) CA997276A (enExample)
CH (1) CH577770A5 (enExample)
DE (1) DE2236173C3 (enExample)
DK (1) DK146140C (enExample)
FR (1) FR2147146B1 (enExample)
GB (2) GB1398733A (enExample)
IT (1) IT961650B (enExample)
MY (2) MY7900107A (enExample)
NL (1) NL175570C (enExample)
NO (1) NO136325C (enExample)
SE (1) SE388330B (enExample)
ZA (1) ZA725084B (enExample)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5545112A (en) 1978-09-22 1980-03-29 Sony Corp Signal transmitter
US4263624A (en) * 1978-12-12 1981-04-21 Dolby Laboratories Licensing Corporation Analog recording on magnetic media
DE3115683C2 (de) * 1981-04-18 1983-07-28 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen Schaltungsanordnung zur verzögerten, automatischen Verstärkungsregelung
JPS6220405A (ja) * 1985-07-18 1987-01-29 Pioneer Electronic Corp 増幅度調整回路
DE202007006689U1 (de) 2007-05-07 2008-09-18 Hetal-Werke Franz Hettich Gmbh & Co. Kg Antriebseinrichtung für einen Beschlag

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE753495A (fr) * 1969-07-21 1970-12-16 Dolby Laboratories Inc Filtres limiteurs perfectionnes pour systemes attenuateurs de bruit. (

Also Published As

Publication number Publication date
NO136325B (enExample) 1977-05-09
NO136325C (no) 1977-08-17
ZA725084B (en) 1973-04-25
JPS5648883B1 (enExample) 1981-11-18
AU476805B2 (en) 1976-10-07
AT351826B (de) 1979-08-10
CH577770A5 (enExample) 1976-07-15
MY7900106A (en) 1979-12-31
DK146140B (da) 1983-07-04
DE2236173C3 (de) 1982-02-11
DE2236173A1 (de) 1973-02-08
SE388330B (sv) 1976-09-27
DK146140C (da) 1983-11-28
DE2236173B2 (de) 1981-06-19
MY7900107A (en) 1979-12-31
ATA636372A (de) 1979-01-15
NL175570B (nl) 1984-06-18
CA997276A (en) 1976-09-21
NL175570C (nl) 1984-11-16
NL7210201A (enExample) 1973-01-26
BE786629A (fr) 1972-11-16
IT961650B (it) 1973-12-10
FR2147146A1 (enExample) 1973-03-09
GB1398732A (en) 1975-06-25
FR2147146B1 (enExample) 1978-02-10
AU4490772A (en) 1974-01-31

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years