DE3113666C2 - - Google Patents

Info

Publication number
DE3113666C2
DE3113666C2 DE19813113666 DE3113666A DE3113666C2 DE 3113666 C2 DE3113666 C2 DE 3113666C2 DE 19813113666 DE19813113666 DE 19813113666 DE 3113666 A DE3113666 A DE 3113666A DE 3113666 C2 DE3113666 C2 DE 3113666C2
Authority
DE
Germany
Prior art keywords
transistor
resistor
hearing aid
amplifier stage
impedance network
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
DE19813113666
Other languages
German (de)
English (en)
Other versions
DE3113666A1 (de
Inventor
Erwin Gahleitner
Wolfgang 1000 Berlin De Koepke
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DE19813113666 priority Critical patent/DE3113666A1/de
Publication of DE3113666A1 publication Critical patent/DE3113666A1/de
Application granted granted Critical
Publication of DE3113666C2 publication Critical patent/DE3113666C2/de
Granted 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
    • H04R25/45—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback
    • H04R25/453—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback electronically
    • 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
    • H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
DE19813113666 1981-04-04 1981-04-04 "hoergeraet mit einem hochverstaerkenden, mehrstufigen transistorverstaerker" Granted DE3113666A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19813113666 DE3113666A1 (de) 1981-04-04 1981-04-04 "hoergeraet mit einem hochverstaerkenden, mehrstufigen transistorverstaerker"

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813113666 DE3113666A1 (de) 1981-04-04 1981-04-04 "hoergeraet mit einem hochverstaerkenden, mehrstufigen transistorverstaerker"

Publications (2)

Publication Number Publication Date
DE3113666A1 DE3113666A1 (de) 1982-10-21
DE3113666C2 true DE3113666C2 (enrdf_load_stackoverflow) 1989-01-05

Family

ID=6129362

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19813113666 Granted DE3113666A1 (de) 1981-04-04 1981-04-04 "hoergeraet mit einem hochverstaerkenden, mehrstufigen transistorverstaerker"

Country Status (1)

Country Link
DE (1) DE3113666A1 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT379724B (de) * 1984-04-16 1986-02-25 Viennatone Gmbh Aktive tonblende fuer hoergeraete

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2641675A1 (de) * 1976-09-16 1978-03-23 Bosch Gmbh Robert Schwerhoerigengeraet mit einem tonfrequenzverstaerker
DE2738339A1 (de) * 1977-08-25 1979-03-01 Bosch Gmbh Robert Hoergeraeteverstaerker

Also Published As

Publication number Publication date
DE3113666A1 (de) 1982-10-21

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Legal Events

Date Code Title Description
8120 Willingness to grant licenses paragraph 23
8110 Request for examination paragraph 44
D2 Grant after examination
8363 Opposition against the patent
8331 Complete revocation