DK224890D0 - DRIVER AMPLIFIER FOR INDUCTION CIRCUIT - Google Patents
DRIVER AMPLIFIER FOR INDUCTION CIRCUITInfo
- Publication number
- DK224890D0 DK224890D0 DK224890A DK224890A DK224890D0 DK 224890 D0 DK224890 D0 DK 224890D0 DK 224890 A DK224890 A DK 224890A DK 224890 A DK224890 A DK 224890A DK 224890 D0 DK224890 D0 DK 224890D0
- Authority
- DK
- Denmark
- Prior art keywords
- driver amplifier
- induction circuit
- induction
- circuit
- amplifier
- Prior art date
Links
- 230000006698 induction Effects 0.000 title 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; 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; 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
- H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
- H04R25/554—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception 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)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Amplifiers (AREA)
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 true DK224890D0 (en) | 1990-09-18 |
DK224890A DK224890A (en) | 1990-09-18 |
Family
ID=10633655
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK224890A DK224890A (en) | 1988-03-18 | 1990-09-18 | DRIVER AMPLIFIER FOR INDUCTION CIRCUIT |
Country Status (4)
Country | Link |
---|---|
AU (1) | AU3299889A (en) |
DK (1) | DK224890A (en) |
GB (2) | GB8806434D0 (en) |
WO (1) | WO1989008970A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007508755A (en) * | 2003-10-14 | 2007-04-05 | オーディオアシクス エー/エス | 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)
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 |
AU559786B2 (en) * | 1981-10-20 | 1987-03-19 | Craigwell Industries Ltd. | Hearing aid |
DE3415319A1 (en) * | 1984-04-25 | 1985-10-31 | ANT Nachrichtentechnik GmbH, 7150 Backnang | Alternating-voltage amplifier |
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 |
-
1988
- 1988-03-18 GB GB888806434A patent/GB8806434D0/en active Pending
-
1989
- 1989-03-17 AU AU32998/89A patent/AU3299889A/en not_active Abandoned
- 1989-03-17 WO PCT/GB1989/000288 patent/WO1989008970A1/en unknown
- 1989-03-17 GB GB8906162A patent/GB2218594B/en not_active Expired - Lifetime
-
1990
- 1990-09-18 DK DK224890A patent/DK224890A/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
GB8806434D0 (en) | 1988-04-20 |
WO1989008970A1 (en) | 1989-09-21 |
GB2218594B (en) | 1992-08-26 |
DK224890A (en) | 1990-09-18 |
GB8906162D0 (en) | 1989-05-04 |
AU3299889A (en) | 1989-10-05 |
GB2218594A (en) | 1989-11-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AHS | Application shelved for other reasons than non-payment |