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 MICROPHONES

Info

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
Application number
AT206986A
Other languages
German (de)
Other versions
ATA206986A (en
Inventor
Ernst Ing Ruberl
Josef Ing Wurzer
Original Assignee
Akg Akustische Kino Geraete
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 Akg Akustische Kino Geraete filed Critical Akg Akustische Kino Geraete
Priority to AT206986A priority Critical patent/AT386303B/en
Priority to DE19873724262 priority patent/DE3724262C2/en
Publication of ATA206986A publication Critical patent/ATA206986A/en
Application granted granted Critical
Publication of AT386303B publication Critical patent/AT386303B/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—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)
AT206986A 1986-07-31 1986-07-31 CIRCUIT ARRANGEMENT FOR CAPACITIVE VOLTAGE SOURCES HIGH OUTPUT IMPEDANCE, ESPECIALLY FOR CONDENSER MICROPHONES AT386303B (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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