DK0504460T3 - Hearing aid with an output stage working in clutch mode - Google Patents

Hearing aid with an output stage working in clutch mode

Info

Publication number
DK0504460T3
DK0504460T3 DK91104449.3T DK91104449T DK0504460T3 DK 0504460 T3 DK0504460 T3 DK 0504460T3 DK 91104449 T DK91104449 T DK 91104449T DK 0504460 T3 DK0504460 T3 DK 0504460T3
Authority
DK
Denmark
Prior art keywords
output stage
earpiece
hearing aid
clutch mode
stage working
Prior art date
Application number
DK91104449.3T
Other languages
Danish (da)
Inventor
Anton Gebert
Original Assignee
Siemens Audiologische Technik
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 Siemens Audiologische Technik filed Critical Siemens Audiologische Technik
Application granted granted Critical
Publication of DK0504460T3 publication Critical patent/DK0504460T3/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/217—Class D power amplifiers; Switching amplifiers
    • H03F3/2171—Class D power amplifiers; Switching amplifiers with field-effect devices
    • 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

Abstract

In a hearing aid with an amplifier and with a push-pull output stage (6) which operates in switched mode and connects an earpiece (15) in an output circuit (19) in temporal dependence on an audible sound signal with an ultrasonic frequency, control of the frequency response of the connected earpiece is to be enabled by means of a capacitor connected in parallel with the earpiece. For this purpose, the output stage has at least one feed-out means (28, 29; 34; 38) via which an electric signal (UR) dependent on the switching state of the earpiece (15) can be removed which acts via at least one feedback path (22 to 27; 35, 36, 26, 27) on the output stage (6) to increase the impedance of the output circuit (19). <IMAGE>
DK91104449.3T 1991-03-21 1991-03-21 Hearing aid with an output stage working in clutch mode DK0504460T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91104449A EP0504460B1 (en) 1991-03-21 1991-03-21 Hearing aid with a switching amplifier output stage

Publications (1)

Publication Number Publication Date
DK0504460T3 true DK0504460T3 (en) 1995-07-10

Family

ID=8206553

Family Applications (1)

Application Number Title Priority Date Filing Date
DK91104449.3T DK0504460T3 (en) 1991-03-21 1991-03-21 Hearing aid with an output stage working in clutch mode

Country Status (5)

Country Link
EP (1) EP0504460B1 (en)
AT (1) ATE118132T1 (en)
CA (1) CA2063512A1 (en)
DE (1) DE59104497D1 (en)
DK (1) DK0504460T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5672998A (en) * 1995-08-09 1997-09-30 Harris Corporation Class D amplifier and method
US5815581A (en) * 1995-10-19 1998-09-29 Mitel Semiconductor, Inc. Class D hearing aid amplifier with feedback

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5014016A (en) * 1989-04-13 1991-05-07 Beltone Electronics Corporation Switching amplifier

Also Published As

Publication number Publication date
DE59104497D1 (en) 1995-03-16
CA2063512A1 (en) 1992-09-22
EP0504460A1 (en) 1992-09-23
ATE118132T1 (en) 1995-02-15
EP0504460B1 (en) 1995-02-01

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