NL145738B - CIRCUIT FOR A MICROPHONE AMPLIFIER. - Google Patents

CIRCUIT FOR A MICROPHONE AMPLIFIER.

Info

Publication number
NL145738B
NL145738B NL6918399A NL6918399A NL145738B NL 145738 B NL145738 B NL 145738B NL 6918399 A NL6918399 A NL 6918399A NL 6918399 A NL6918399 A NL 6918399A NL 145738 B NL145738 B NL 145738B
Authority
NL
Netherlands
Prior art keywords
circuit
microphone amplifier
microphone
amplifier
Prior art date
Application number
NL6918399A
Other languages
Dutch (nl)
Other versions
NL6918399A (en
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 NL6918399A publication Critical patent/NL6918399A/xx
Publication of NL145738B publication Critical patent/NL145738B/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/68—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
NL6918399A 1968-12-17 1969-12-08 CIRCUIT FOR A MICROPHONE AMPLIFIER. NL145738B (en)

Applications Claiming Priority (2)

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

Publications (2)

Publication Number Publication Date
NL6918399A NL6918399A (en) 1970-06-19
NL145738B true NL145738B (en) 1975-04-15

Family

ID=25756604

Family Applications (1)

Application Number Title Priority Date Filing Date
NL6918399A NL145738B (en) 1968-12-17 1969-12-08 CIRCUIT FOR A MICROPHONE AMPLIFIER.

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)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8004675A (en) * 1980-08-19 1982-03-16 Philips Nv SIGNAL BUFFER CIRCUIT IN AN INTEGRATED CIRCUIT FOR SUPPLYING AN OUTPUT SIGNAL TO A TERMINAL.

Also Published As

Publication number Publication date
DE1815174B2 (en) 1970-10-29
AT296403B (en) 1972-02-10
NL6918399A (en) 1970-06-19
JPS5113962B1 (en) 1976-05-06
GB1244548A (en) 1971-09-02
SE346190B (en) 1972-06-26
FR2026348A1 (en) 1970-09-18
DE1815174A1 (en) 1970-06-18
LU60014A1 (en) 1970-02-16
BG20634A3 (en) 1975-12-05
CH512862A (en) 1971-09-15
BE743283A (en) 1970-06-17
DE1815173B1 (en) 1970-08-20

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