FR2026348A1 - - Google Patents

Info

Publication number
FR2026348A1
FR2026348A1 FR6943549A FR6943549A FR2026348A1 FR 2026348 A1 FR2026348 A1 FR 2026348A1 FR 6943549 A FR6943549 A FR 6943549A FR 6943549 A FR6943549 A FR 6943549A FR 2026348 A1 FR2026348 A1 FR 2026348A1
Authority
FR
France
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
FR6943549A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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
Priority claimed from DE19681815174 external-priority patent/DE1815174C/en
Application filed by Siemens AG filed Critical Siemens AG
Publication of FR2026348A1 publication Critical patent/FR2026348A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/34—DC amplifiers in which all stages are DC-coupled
    • H03F3/343—DC amplifiers in which all stages are DC-coupled with semiconductor devices only
    • H03F3/347—DC amplifiers in which all stages are DC-coupled with semiconductor devices only in integrated circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6008—Substation equipment, e.g. for use by subscribers including speech amplifiers in the transmitter circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)
FR6943549A 1968-12-17 1969-12-16 Withdrawn FR2026348A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19681815174 DE1815174C (en) 1968-12-17 Telephone microphone amplifier with power supply on the output side
DE19681815173 DE1815173B1 (en) 1968-12-17 1968-12-17 Circuit arrangement for telephone microphone amplifier

Publications (1)

Publication Number Publication Date
FR2026348A1 true FR2026348A1 (en) 1970-09-18

Family

ID=25756604

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6943549A Withdrawn FR2026348A1 (en) 1968-12-17 1969-12-16

Country Status (11)

Country Link
JP (1) JPS5113962B1 (en)
AT (1) AT296403B (en)
BE (1) BE743283A (en)
BG (1) BG20634A3 (en)
CH (1) CH512862A (en)
DE (1) DE1815173B1 (en)
FR (1) FR2026348A1 (en)
GB (1) GB1244548A (en)
LU (1) LU60014A1 (en)
NL (1) NL145738B (en)
SE (1) SE346190B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2489057A1 (en) * 1980-08-19 1982-02-26 Philips Nv BUFFER CIRCUIT ARRANGED INTO AN INTEGRATED CIRCUIT AND FOR PROVIDING AN OUTPUT SIGNAL TO A TERMINAL CONNECTING THIS CIRCUIT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2489057A1 (en) * 1980-08-19 1982-02-26 Philips Nv BUFFER CIRCUIT ARRANGED INTO AN INTEGRATED CIRCUIT AND FOR PROVIDING AN OUTPUT SIGNAL TO A TERMINAL CONNECTING THIS CIRCUIT

Also Published As

Publication number Publication date
SE346190B (en) 1972-06-26
DE1815174A1 (en) 1970-06-18
BE743283A (en) 1970-06-17
BG20634A3 (en) 1975-12-05
LU60014A1 (en) 1970-02-16
GB1244548A (en) 1971-09-02
CH512862A (en) 1971-09-15
DE1815174B2 (en) 1970-10-29
NL6918399A (en) 1970-06-19
NL145738B (en) 1975-04-15
DE1815173B1 (en) 1970-08-20
AT296403B (en) 1972-02-10
JPS5113962B1 (en) 1976-05-06

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Legal Events

Date Code Title Description
ST Notification of lapse