NL7302303A - - Google Patents

Info

Publication number
NL7302303A
NL7302303A NL7302303A NL7302303A NL7302303A NL 7302303 A NL7302303 A NL 7302303A NL 7302303 A NL7302303 A NL 7302303A NL 7302303 A NL7302303 A NL 7302303A NL 7302303 A NL7302303 A NL 7302303A
Authority
NL
Netherlands
Application number
NL7302303A
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 filed Critical
Priority to NL7302303A priority Critical patent/NL7302303A/xx
Priority to GB427874A priority patent/GB1454617A/en
Priority to DE19742405783 priority patent/DE2405783C2/de
Priority to JP49019325A priority patent/JPS49115453A/ja
Priority to FR7405475A priority patent/FR2219599B1/fr
Publication of NL7302303A publication Critical patent/NL7302303A/xx

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)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Power Engineering (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Networks Using Active Elements (AREA)
  • Amplifiers (AREA)
NL7302303A 1973-02-20 1973-02-20 NL7302303A (en))

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL7302303A NL7302303A (en)) 1973-02-20 1973-02-20
GB427874A GB1454617A (en) 1973-02-20 1974-01-30 Low-frequency amplifier
DE19742405783 DE2405783C2 (de) 1973-02-20 1974-02-07 Niederfrequenzverstärker
JP49019325A JPS49115453A (en)) 1973-02-20 1974-02-18
FR7405475A FR2219599B1 (en)) 1973-02-20 1974-02-19

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
NL7302303A true NL7302303A (en)) 1974-08-22

Family

ID=19818261

Family Applications (1)

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

Country Status (5)

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

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
DE2405783A1 (de) 1974-08-22
DE2405783C2 (de) 1981-12-10
JPS49115453A (en)) 1974-11-05
FR2219599B1 (en)) 1982-05-07
FR2219599A1 (en)) 1974-09-20
GB1454617A (en) 1976-11-03

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