RO80670A - Circuit de amplificator de microfon telefonic - Google Patents

Circuit de amplificator de microfon telefonic

Info

Publication number
RO80670A
RO80670A RO7998202A RO9820279A RO80670A RO 80670 A RO80670 A RO 80670A RO 7998202 A RO7998202 A RO 7998202A RO 9820279 A RO9820279 A RO 9820279A RO 80670 A RO80670 A RO 80670A
Authority
RO
Romania
Prior art keywords
microfon
amplifier circuit
telephone amplifier
telephone
circuit
Prior art date
Application number
RO7998202A
Other languages
English (en)
French (fr)
Romanian (ro)
Inventor
Bernhard Gutsche
Volker Lindemann
Original Assignee
Veb Fernmeldewerk,Dd
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 Veb Fernmeldewerk,Dd filed Critical Veb Fernmeldewerk,Dd
Publication of RO80670A publication Critical patent/RO80670A/ro

Links

Classifications

    • 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
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/302—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in bipolar transistor amplifiers
    • 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
    • H03F3/187—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only in integrated circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)
RO7998202A 1978-08-03 1979-07-19 Circuit de amplificator de microfon telefonic RO80670A (ro)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD20710578A DD138260B1 (de) 1978-08-03 1978-08-03 Schaltungsanordnung fuer integrierte verstaerker der zweidrahttechnik

Publications (1)

Publication Number Publication Date
RO80670A true RO80670A (ro) 1982-12-06

Family

ID=5513890

Family Applications (1)

Application Number Title Priority Date Filing Date
RO7998202A RO80670A (ro) 1978-08-03 1979-07-19 Circuit de amplificator de microfon telefonic

Country Status (5)

Country Link
CU (1) CU21084A (US20100223739A1-20100909-C00005.png)
DD (1) DD138260B1 (US20100223739A1-20100909-C00005.png)
DE (1) DE2922693A1 (US20100223739A1-20100909-C00005.png)
HU (1) HU184627B (US20100223739A1-20100909-C00005.png)
RO (1) RO80670A (US20100223739A1-20100909-C00005.png)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1762924B1 (de) * 1968-09-24 1970-09-03 Siemens Ag Schaltungsanordnung fuer einen Fernsprechmikrofonverstaerker mit verstaerkerausgangsseitiger Speisung
DE2121929C3 (de) * 1971-05-04 1980-09-11 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Spannungsstabilisierter Transistorverstärker

Also Published As

Publication number Publication date
DD138260A1 (de) 1979-10-17
DE2922693A1 (de) 1980-02-14
DD138260B1 (de) 1981-10-28
DE2922693C2 (US20100223739A1-20100909-C00005.png) 1987-03-05
HU184627B (en) 1984-09-28
CU21084A (es) 1982-03-28

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