FR1571567A - - Google Patents

Info

Publication number
FR1571567A
FR1571567A FR1571567DA FR1571567A FR 1571567 A FR1571567 A FR 1571567A FR 1571567D A FR1571567D A FR 1571567DA FR 1571567 A FR1571567 A FR 1571567A
Authority
FR
France
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
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
Application granted granted Critical
Publication of FR1571567A publication Critical patent/FR1571567A/fr
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
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/02—Manually-operated control
    • H03G3/04—Manually-operated control in untuned amplifiers
    • H03G3/10—Manually-operated control in untuned amplifiers having semiconductor devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/02—Manually-operated control
    • H03G3/04—Manually-operated control in untuned amplifiers
    • H03G3/10—Manually-operated control in untuned amplifiers having semiconductor devices
    • H03G3/12—Manually-operated control in untuned amplifiers having semiconductor devices incorporating negative feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Power Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
FR1571567D 1967-06-09 1968-06-10 Expired FR1571567A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL676708111A NL146670B (nl) 1967-06-09 1967-06-09 Inrichting met een transistorversterker.

Publications (1)

Publication Number Publication Date
FR1571567A true FR1571567A (fr) 1969-06-20

Family

ID=19800400

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1571567D Expired FR1571567A (fr) 1967-06-09 1968-06-10

Country Status (9)

Country Link
US (1) US3578913A (fr)
AT (1) AT288508B (fr)
BE (1) BE716283A (fr)
CH (1) CH475673A (fr)
DE (1) DE1289121B (fr)
ES (1) ES354768A1 (fr)
FR (1) FR1571567A (fr)
GB (1) GB1210715A (fr)
NL (1) NL146670B (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3763333A (en) * 1972-07-24 1973-10-02 Ambitex Co Acoustic feedback stabilization system particularly suited for hearing aids
US4194165A (en) * 1978-06-28 1980-03-18 Skulski Peter J Miniature guitar amplifier
US4543453A (en) * 1983-03-30 1985-09-24 Beltone Electronics Corporation Electronic hearing aid control circuit
US6480610B1 (en) * 1999-09-21 2002-11-12 Sonic Innovations, Inc. Subband acoustic feedback cancellation in hearing aids
US6757395B1 (en) 2000-01-12 2004-06-29 Sonic Innovations, Inc. Noise reduction apparatus and method
KR100718384B1 (ko) * 2005-02-25 2007-05-14 주식회사 팬택앤큐리텔 Ｉｃ 칩 형태로 구현한 이동통신 단말기의 청취 보조 회로및 이를 내장한 이동통신 단말기

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3030586A (en) * 1955-02-18 1962-04-17 Philco Corp Transistor circuit
DE1135048B (de) * 1961-01-11 1962-08-23 Robert Bosch Elektronik Ges Mi Transistor-Niederfrequenzverstaerker mit Lautstaerkeregelung
US3140348A (en) * 1961-03-21 1964-07-07 Paul S Jones Transistor amplifier
US3382321A (en) * 1964-07-09 1968-05-07 Radioear Corp Transistorized amplifier circuit for hearing aids
US3399276A (en) * 1965-04-28 1968-08-27 Admiral Corp Rc coupled transistor amplifier

Also Published As

Publication number Publication date
BE716283A (fr) 1968-12-09
GB1210715A (en) 1970-10-28
CH475673A (de) 1969-07-15
NL146670B (nl) 1975-07-15
ES354768A1 (es) 1969-11-16
DE1289121B (de) 1969-02-13
NL6708111A (fr) 1968-12-10
AT288508B (de) 1971-03-10
US3578913A (en) 1971-05-18

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Legal Events

Date Code Title Description
ST Notification of lapse