ES413099A1 - Circuit arrangement having an amplitude and frequency dependent transfer function - Google Patents

Circuit arrangement having an amplitude and frequency dependent transfer function

Info

Publication number
ES413099A1
ES413099A1 ES413099A ES413099A ES413099A1 ES 413099 A1 ES413099 A1 ES 413099A1 ES 413099 A ES413099 A ES 413099A ES 413099 A ES413099 A ES 413099A ES 413099 A1 ES413099 A1 ES 413099A1
Authority
ES
Spain
Prior art keywords
amplitude
dependent
transfer function
impedance
frequency dependent
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
ES413099A
Other languages
Spanish (es)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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
Priority claimed from NL7204290A external-priority patent/NL7204290A/xx
Priority claimed from NL7301752A external-priority patent/NL7301752A/xx
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of ES413099A1 publication Critical patent/ES413099A1/en
Expired legal-status Critical Current

Links

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)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Television Signal Processing For Recording (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Dc Digital Transmission (AREA)

Abstract

Signal transmission device that has a transfer function that is amplitude dependent and frequency dependent for use in a noise reduction system, characterized in that the device includes a circuit that comprises a first impedance element, the path main current of a first transistor and a second impedance element, whose circuit elements are traversed in series by the same signal current, an input that is connected to the control electrode of the first transistor, and an output of which can be derived the signal voltage between the ends of one of the impedance elements, the impedance realized by the second impedance element having a nature that is dependent on amplitude and dependent on frequency. (Machine-translation by Google Translate, not legally binding)
ES413099A 1972-03-30 1973-03-28 Circuit arrangement having an amplitude and frequency dependent transfer function Expired ES413099A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7204290A NL7204290A (en) 1972-03-30 1972-03-30
NL7301752A NL7301752A (en) 1973-02-08 1973-02-08

Publications (1)

Publication Number Publication Date
ES413099A1 true ES413099A1 (en) 1976-01-16

Family

ID=26644756

Family Applications (1)

Application Number Title Priority Date Filing Date
ES413099A Expired ES413099A1 (en) 1972-03-30 1973-03-28 Circuit arrangement having an amplitude and frequency dependent transfer function

Country Status (12)

Country Link
JP (1) JPS5649008B2 (en)
AR (1) AR195708A1 (en)
AT (1) AT346906B (en)
BE (1) BE797480A (en)
CA (1) CA975439A (en)
CH (1) CH561488A5 (en)
DE (1) DE2312086C3 (en)
ES (1) ES413099A1 (en)
FR (1) FR2178108B1 (en)
GB (1) GB1431481A (en)
IT (1) IT980703B (en)
SE (1) SE388988B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3909733A (en) * 1973-05-17 1975-09-30 Dolby Laboratories Inc Dynamic range modifying circuits utilizing variable negative resistance
NL7413514A (en) * 1974-10-15 1976-04-21 Philips Nv DEVICE FOR THE OPTIONAL REALIZATION OF TWO COMPLETE FUNCTIONS.
JPS55156431A (en) * 1979-05-24 1980-12-05 Sony Corp Noise reduction system
JPS5762779A (en) * 1980-09-29 1982-04-15 Toshiba Corp Alwave rectifying circuit
LU87145A1 (en) * 1988-02-26 1989-09-20 Oreal METHOD FOR IMPROVING THE AESTHETIC APPEARANCE OF THE SKIN USING POLYVITAMIN MIXTURES
JPH0483548A (en) * 1990-07-24 1992-03-17 Masaya Koyama Whipper and whipping container

Family Cites Families (5)

* Cited by examiner, † Cited by third party
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 (en) * 1972-08-23 1982-02-04

Also Published As

Publication number Publication date
DE2312086A1 (en) 1973-10-31
AT346906B (en) 1978-12-11
BE797480A (en) 1973-09-28
JPS4910010A (en) 1974-01-29
GB1431481A (en) 1976-04-07
IT980703B (en) 1974-10-10
CA975439A (en) 1975-09-30
AR195708A1 (en) 1973-10-31
SE388988B (en) 1976-10-18
ATA270873A (en) 1978-04-15
DE2312086C3 (en) 1979-10-31
FR2178108A1 (en) 1973-11-09
FR2178108B1 (en) 1976-05-21
CH561488A5 (en) 1975-04-30
DE2312086B2 (en) 1979-03-22
JPS5649008B2 (en) 1981-11-19

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