AU636248B2 - A switched amplifier - Google Patents

A switched amplifier Download PDF

Info

Publication number
AU636248B2
AU636248B2 AU85868/91A AU8586891A AU636248B2 AU 636248 B2 AU636248 B2 AU 636248B2 AU 85868/91 A AU85868/91 A AU 85868/91A AU 8586891 A AU8586891 A AU 8586891A AU 636248 B2 AU636248 B2 AU 636248B2
Authority
AU
Australia
Prior art keywords
switched
amplifier
audio signal
amplified
hearing aid
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
AU85868/91A
Other languages
English (en)
Other versions
AU8586891A (en
Inventor
Francois Callias
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.)
Bernafon AG
Original Assignee
Ascom Audiosys AG
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 Ascom Audiosys AG filed Critical Ascom Audiosys AG
Publication of AU8586891A publication Critical patent/AU8586891A/en
Application granted granted Critical
Publication of AU636248B2 publication Critical patent/AU636248B2/en
Anticipated expiration legal-status Critical
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/002—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers
    • H03G7/005—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers using discontinuously variable devices, e.g. switch-operated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
    • H04R25/505—Customised settings for obtaining desired overall acoustical characteristics using digital signal processing

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
AU85868/91A 1990-10-30 1991-10-16 A switched amplifier Expired AU636248B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3446/90 1990-10-30
CH3446/90A CH681499A5 (enExample) 1990-10-30 1990-10-30

Publications (2)

Publication Number Publication Date
AU8586891A AU8586891A (en) 1992-05-14
AU636248B2 true AU636248B2 (en) 1993-04-22

Family

ID=4256128

Family Applications (1)

Application Number Title Priority Date Filing Date
AU85868/91A Expired AU636248B2 (en) 1990-10-30 1991-10-16 A switched amplifier

Country Status (6)

Country Link
US (1) US5317640A (enExample)
EP (1) EP0483702B1 (enExample)
AU (1) AU636248B2 (enExample)
CH (1) CH681499A5 (enExample)
DE (1) DE59106139D1 (enExample)
DK (1) DK0483702T3 (enExample)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0576700B1 (de) * 1992-06-29 1996-01-03 Siemens Audiologische Technik GmbH Hörgerät
DK0576701T3 (da) * 1992-06-29 1996-06-03 Siemens Audiologische Technik Høreapparat
US5815581A (en) * 1995-10-19 1998-09-29 Mitel Semiconductor, Inc. Class D hearing aid amplifier with feedback
US5838807A (en) * 1995-10-19 1998-11-17 Mitel Semiconductor, Inc. Trimmable variable compression amplifier for hearing aid
US6044162A (en) * 1996-12-20 2000-03-28 Sonic Innovations, Inc. Digital hearing aid using differential signal representations
US5963106A (en) * 1998-03-16 1999-10-05 Sonic Innovations, Inc. Double-sided pulse width modulator
US6687380B1 (en) 1999-12-17 2004-02-03 Broan-Nutone Llc Active sub-woofer speaker system
US20060072776A1 (en) * 1999-12-17 2006-04-06 Tejaswi Vishwamitra Amplifier and sub-woofer speaker system
US7889875B2 (en) * 2006-11-09 2011-02-15 National Chiao Tung University Class-D driving method for stereo load
TWI392214B (zh) * 2009-06-04 2013-04-01 Univ Nat Chiao Tung The driving device and driving method of multi - phase straight / AC converter
US10957445B2 (en) 2017-10-05 2021-03-23 Hill-Rom Services, Inc. Caregiver and staff information system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4592087A (en) * 1983-12-08 1986-05-27 Industrial Research Products, Inc. Class D hearing aid amplifier
WO1988010025A1 (en) * 1987-06-08 1988-12-15 Hughes Aircraft Company Envelope amplifier

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3229049A (en) * 1960-08-04 1966-01-11 Goldberg Hyman Hearing aid
DE3017414A1 (de) * 1980-05-07 1981-11-12 Deutsche Itt Industries Gmbh, 7800 Freiburg Audio-leistungsverstaerker mit d-gegentakt-endstufe
US4689819B1 (en) * 1983-12-08 1996-08-13 Knowles Electronics Inc Class D hearing aid amplifier
US4829270A (en) * 1986-03-12 1989-05-09 Beltone Electronics Corporation Compansion system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4592087A (en) * 1983-12-08 1986-05-27 Industrial Research Products, Inc. Class D hearing aid amplifier
US4592087B1 (en) * 1983-12-08 1996-08-13 Knowles Electronics Inc Class D hearing aid amplifier
WO1988010025A1 (en) * 1987-06-08 1988-12-15 Hughes Aircraft Company Envelope amplifier

Also Published As

Publication number Publication date
DE59106139D1 (de) 1995-09-07
EP0483702B1 (de) 1995-08-02
AU8586891A (en) 1992-05-14
DK0483702T3 (da) 1995-12-18
CH681499A5 (enExample) 1993-03-31
US5317640A (en) 1994-05-31
EP0483702A3 (en) 1993-06-09
EP0483702A2 (de) 1992-05-06

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