DE2405783C2 - Niederfrequenzverstärker - Google Patents

Niederfrequenzverstärker

Info

Publication number
DE2405783C2
DE2405783C2 DE19742405783 DE2405783A DE2405783C2 DE 2405783 C2 DE2405783 C2 DE 2405783C2 DE 19742405783 DE19742405783 DE 19742405783 DE 2405783 A DE2405783 A DE 2405783A DE 2405783 C2 DE2405783 C2 DE 2405783C2
Authority
DE
Germany
Prior art keywords
output
input
potentiometer
signal
resonance frequency
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
DE19742405783
Other languages
German (de)
English (en)
Other versions
DE2405783A1 (de
Inventor
Leonard Cornelis Eindhoven Keijser
Derk Kleis
Wilfridus B. Vrielink
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
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of DE2405783A1 publication Critical patent/DE2405783A1/de
Application granted granted Critical
Publication of DE2405783C2 publication Critical patent/DE2405783C2/de
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/02—Manually-operated control
    • H03G5/025—Equalizers; Volume or gain control in limited frequency bands
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H03H11/1217—Frequency selective two-port networks using amplifiers with feedback using a plurality of operational amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Power Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Amplifiers (AREA)
  • Networks Using Active Elements (AREA)
DE19742405783 1973-02-20 1974-02-07 Niederfrequenzverstärker Expired DE2405783C2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7302303A NL7302303A (enrdf_load_stackoverflow) 1973-02-20 1973-02-20

Publications (2)

Publication Number Publication Date
DE2405783A1 DE2405783A1 (de) 1974-08-22
DE2405783C2 true DE2405783C2 (de) 1981-12-10

Family

ID=19818261

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19742405783 Expired DE2405783C2 (de) 1973-02-20 1974-02-07 Niederfrequenzverstärker

Country Status (5)

Country Link
JP (1) JPS49115453A (enrdf_load_stackoverflow)
DE (1) DE2405783C2 (enrdf_load_stackoverflow)
FR (1) FR2219599B1 (enrdf_load_stackoverflow)
GB (1) GB1454617A (enrdf_load_stackoverflow)
NL (1) NL7302303A (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4336501A (en) * 1978-09-26 1982-06-22 Nippon Columbia Kabushiki Kaisha Frequency characteristic adjusting circuit
JPS56134815A (en) * 1980-03-24 1981-10-21 Nippon Gakki Seizo Kk Filter circuit
JPS57142013A (en) 1981-02-27 1982-09-02 Sony Corp Active equalizer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3657480A (en) * 1969-08-22 1972-04-18 Theodore Cheng Multi channel audio system with crossover network feeding separate amplifiers for each channel with direct coupling to low frequency loudspeaker

Also Published As

Publication number Publication date
GB1454617A (en) 1976-11-03
NL7302303A (enrdf_load_stackoverflow) 1974-08-22
FR2219599A1 (enrdf_load_stackoverflow) 1974-09-20
JPS49115453A (enrdf_load_stackoverflow) 1974-11-05
DE2405783A1 (de) 1974-08-22
FR2219599B1 (enrdf_load_stackoverflow) 1982-05-07

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Legal Events

Date Code Title Description
OD Request for examination
D2 Grant after examination
8339 Ceased/non-payment of the annual fee