NL7205579A - - Google Patents
Info
- Publication number
- NL7205579A NL7205579A NL7205579A NL7205579A NL7205579A NL 7205579 A NL7205579 A NL 7205579A NL 7205579 A NL7205579 A NL 7205579A NL 7205579 A NL7205579 A NL 7205579A NL 7205579 A NL7205579 A NL 7205579A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
- H03G3/301—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable
- H03G3/3015—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable using diodes or transistors
-
- 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
- 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
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)
- Power Engineering (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19712135684 DE2135684A1 (de) | 1971-07-16 | 1971-07-16 | Hoergeraet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL7205579A true NL7205579A (xx) | 1973-01-18 |
Family
ID=5813950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7205579A NL7205579A (xx) | 1971-07-16 | 1972-04-25 |
Country Status (3)
| Country | Link |
|---|---|
| AT (1) | AT308862B (xx) |
| DE (1) | DE2135684A1 (xx) |
| NL (1) | NL7205579A (xx) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5144675A (en) * | 1990-03-30 | 1992-09-01 | Etymotic Research, Inc. | Variable recovery time circuit for use with wide dynamic range automatic gain control for hearing aid |
| US5680466A (en) * | 1994-10-06 | 1997-10-21 | Zelikovitz; Joseph | Omnidirectional hearing aid |
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1971
- 1971-07-16 DE DE19712135684 patent/DE2135684A1/de active Pending
-
1972
- 1972-04-25 NL NL7205579A patent/NL7205579A/xx unknown
- 1972-05-15 AT AT421072A patent/AT308862B/de not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| AT308862B (de) | 1973-07-25 |
| DE2135684A1 (de) | 1973-01-25 |