DK224890A - Driverforstaerker til induktionssloejfe - Google Patents

Driverforstaerker til induktionssloejfe Download PDF

Info

Publication number
DK224890A
DK224890A DK224890A DK224890A DK224890A DK 224890 A DK224890 A DK 224890A DK 224890 A DK224890 A DK 224890A DK 224890 A DK224890 A DK 224890A DK 224890 A DK224890 A DK 224890A
Authority
DK
Denmark
Prior art keywords
driver amplifier
induction circuit
induction
circuit
amplifier
Prior art date
Application number
DK224890A
Other languages
English (en)
Other versions
DK224890D0 (da
Inventor
Leon Andre Pieters
Original Assignee
Leon Andre Pieters
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 Leon Andre Pieters filed Critical Leon Andre Pieters
Publication of DK224890D0 publication Critical patent/DK224890D0/da
Publication of DK224890A publication Critical patent/DK224890A/da

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R27/00—Public address systems
    • H04R27/02—Amplifying systems for the deaf
    • 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
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/16—Automatic control
    • H03G5/18—Automatic control in untuned amplifiers
    • 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
    • H04R25/55—Electric hearing aids using an external connection, either wireless or wired
    • H04R25/554—Electric hearing aids using an external connection, either wireless or wired using a wireless connection, e.g. between microphone and amplifier or using Tcoils

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
DK224890A 1988-03-18 1990-09-18 Driverforstaerker til induktionssloejfe DK224890A (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB888806434A GB8806434D0 (en) 1988-03-18 1988-03-18 Current-driving amplifiers
PCT/GB1989/000288 WO1989008970A1 (en) 1988-03-18 1989-03-17 Induction loop driving amplifiers

Publications (2)

Publication Number Publication Date
DK224890D0 DK224890D0 (da) 1990-09-18
DK224890A true DK224890A (da) 1990-09-18

Family

ID=10633655

Family Applications (1)

Application Number Title Priority Date Filing Date
DK224890A DK224890A (da) 1988-03-18 1990-09-18 Driverforstaerker til induktionssloejfe

Country Status (4)

Country Link
AU (1) AU3299889A (da)
DK (1) DK224890A (da)
GB (2) GB8806434D0 (da)
WO (1) WO1989008970A1 (da)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005039041A1 (en) * 2003-10-14 2005-04-28 Audioasics A/S Microphone preamplifier
FI125489B (en) * 2014-01-03 2015-10-30 Telesilmukka Oy Controller for induction loop system
GB2526630B (en) * 2014-05-30 2016-05-04 Contacta Systems Ltd Amplifier for induction loop
GB2543364B (en) * 2015-10-16 2018-06-27 Contacta Systems Ltd Induction loop circuit

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3621151A (en) * 1969-10-15 1971-11-16 Grt Corp Frequency selective audio limiter
US3668322A (en) * 1970-06-18 1972-06-06 Columbia Broadcasting Syst Inc Dynamic presence equalizer
US4287477A (en) * 1979-02-22 1981-09-01 Dynamic Compliance, Incorporated Feedback arrangement
ATE14361T1 (de) * 1981-10-20 1985-08-15 Craigwell Ind Ltd Hoerhilfegeraete.
DE3415319A1 (de) * 1984-04-25 1985-10-31 ANT Nachrichtentechnik GmbH, 7150 Backnang Wechselspannungsverstaerker
GB2184629B (en) * 1985-12-10 1989-11-08 Colin David Rickson Compensation of hearing
US4792977A (en) * 1986-03-12 1988-12-20 Beltone Electronics Corporation Hearing aid circuit

Also Published As

Publication number Publication date
GB2218594B (en) 1992-08-26
GB8906162D0 (en) 1989-05-04
GB8806434D0 (en) 1988-04-20
DK224890D0 (da) 1990-09-18
WO1989008970A1 (en) 1989-09-21
GB2218594A (en) 1989-11-15
AU3299889A (en) 1989-10-05

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Legal Events

Date Code Title Description
AHS Application shelved for other reasons than non-payment