AT386303B - CIRCUIT ARRANGEMENT FOR CAPACITIVE VOLTAGE SOURCES HIGH OUTPUT IMPEDANCE, ESPECIALLY FOR CONDENSER MICROPHONES - Google Patents
CIRCUIT ARRANGEMENT FOR CAPACITIVE VOLTAGE SOURCES HIGH OUTPUT IMPEDANCE, ESPECIALLY FOR CONDENSER MICROPHONESInfo
- Publication number
- AT386303B AT386303B AT206986A AT206986A AT386303B AT 386303 B AT386303 B AT 386303B AT 206986 A AT206986 A AT 206986A AT 206986 A AT206986 A AT 206986A AT 386303 B AT386303 B AT 386303B
- Authority
- AT
- Austria
- Prior art keywords
- circuit arrangement
- high output
- output impedance
- voltage sources
- capacitive voltage
- Prior art date
Links
Classifications
-
- 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
- H03F3/185—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only with field-effect devices
- H03F3/1855—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only with field-effect devices with junction-FET devices
-
- 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
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
- H03F1/0216—Continuous control
- H03F1/0233—Continuous control by using a signal derived from the output signal, e.g. bootstrapping the voltage supply
-
- 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
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0283—Reducing the number of DC-current paths
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R19/00—Electrostatic transducers
- H04R19/04—Microphones
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT206986A AT386303B (en) | 1986-07-31 | 1986-07-31 | CIRCUIT ARRANGEMENT FOR CAPACITIVE VOLTAGE SOURCES HIGH OUTPUT IMPEDANCE, ESPECIALLY FOR CONDENSER MICROPHONES |
DE19873724262 DE3724262C2 (en) | 1986-07-31 | 1987-07-22 | Circuit arrangement for capacitive voltage sources of high output impedance, in particular for condenser microphones |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT206986A AT386303B (en) | 1986-07-31 | 1986-07-31 | CIRCUIT ARRANGEMENT FOR CAPACITIVE VOLTAGE SOURCES HIGH OUTPUT IMPEDANCE, ESPECIALLY FOR CONDENSER MICROPHONES |
Publications (2)
Publication Number | Publication Date |
---|---|
ATA206986A ATA206986A (en) | 1987-12-15 |
AT386303B true AT386303B (en) | 1988-08-10 |
Family
ID=3527112
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT206986A AT386303B (en) | 1986-07-31 | 1986-07-31 | CIRCUIT ARRANGEMENT FOR CAPACITIVE VOLTAGE SOURCES HIGH OUTPUT IMPEDANCE, ESPECIALLY FOR CONDENSER MICROPHONES |
Country Status (2)
Country | Link |
---|---|
AT (1) | AT386303B (en) |
DE (1) | DE3724262C2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104685904A (en) * | 2013-01-08 | 2015-06-03 | 陈冰丽 | Condenser microphone and its impedance converter |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2376819A (en) * | 2001-06-21 | 2002-12-24 | Ericsson Telefon Ab L M | Electronic circuit having series connected circuit blocks |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3999139A (en) * | 1974-08-19 | 1976-12-21 | Motorola, Inc. | Monolithic alternately stacked IF amplifier |
AT374639B (en) * | 1977-03-23 | 1984-05-10 | Bosch Gmbh Robert | MULTI-STAGE TRANSISTOR AMPLIFIER FOR AC VOLTAGES |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2020739A1 (en) * | 1970-04-23 | 1971-11-11 | Georg Neumann Gmbh Electroacus | Amplifier circuit for capacitive microphones |
AT377873B (en) * | 1981-10-22 | 1985-05-10 | Akg Akustische Kino Geraete | IMPEDANCE CONVERTER CIRCUIT FOR CAPACITIVE VOLTAGE SOURCES |
JPH05238212A (en) * | 1992-03-02 | 1993-09-17 | Yokohama Rubber Co Ltd:The | Pneumatic tire for passenger car |
-
1986
- 1986-07-31 AT AT206986A patent/AT386303B/en not_active IP Right Cessation
-
1987
- 1987-07-22 DE DE19873724262 patent/DE3724262C2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3999139A (en) * | 1974-08-19 | 1976-12-21 | Motorola, Inc. | Monolithic alternately stacked IF amplifier |
AT374639B (en) * | 1977-03-23 | 1984-05-10 | Bosch Gmbh Robert | MULTI-STAGE TRANSISTOR AMPLIFIER FOR AC VOLTAGES |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104685904A (en) * | 2013-01-08 | 2015-06-03 | 陈冰丽 | Condenser microphone and its impedance converter |
CN104685904B (en) * | 2013-01-08 | 2017-10-03 | 广东得胜电子有限公司 | Electret Condencer Microphone and its impedance transformer |
Also Published As
Publication number | Publication date |
---|---|
DE3724262A1 (en) | 1988-02-11 |
ATA206986A (en) | 1987-12-15 |
DE3724262C2 (en) | 1995-11-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ELA | Expired due to lapse of time |