CH512862A - Schaltungsanordnung für Fernsprechmikrofonverstärker - Google Patents
Schaltungsanordnung für FernsprechmikrofonverstärkerInfo
- Publication number
- CH512862A CH512862A CH1851669A CH1851669A CH512862A CH 512862 A CH512862 A CH 512862A CH 1851669 A CH1851669 A CH 1851669A CH 1851669 A CH1851669 A CH 1851669A CH 512862 A CH512862 A CH 512862A
- Authority
- CH
- Switzerland
- Prior art keywords
- circuit arrangement
- telephone microphone
- microphone amplifiers
- amplifiers
- telephone
- 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
- H03F3/68—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)
- Multimedia (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19681815173 DE1815173B1 (de) | 1968-12-17 | 1968-12-17 | Schaltungsanordnung fuer Fernsprechmikrofonverstaerker |
| DE19681815174 DE1815174C (de) | 1968-12-17 | Fernsprechmikrofonverstarker mit ver starkerausgangsseitiger Speisung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH512862A true CH512862A (de) | 1971-09-15 |
Family
ID=25756604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH1851669A CH512862A (de) | 1968-12-17 | 1969-12-11 | Schaltungsanordnung für Fernsprechmikrofonverstärker |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPS5113962B1 (de) |
| AT (1) | AT296403B (de) |
| BE (1) | BE743283A (de) |
| BG (1) | BG20634A3 (de) |
| CH (1) | CH512862A (de) |
| DE (1) | DE1815173B1 (de) |
| FR (1) | FR2026348A1 (de) |
| GB (1) | GB1244548A (de) |
| LU (1) | LU60014A1 (de) |
| NL (1) | NL145738B (de) |
| SE (1) | SE346190B (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8004675A (nl) * | 1980-08-19 | 1982-03-16 | Philips Nv | Signaalbufferschakeling in een geintegreerde schakeling voor het leveren van een uitgangssignaal aan een aansluitklem. |
-
1968
- 1968-12-17 DE DE19681815173 patent/DE1815173B1/de not_active Withdrawn
-
1969
- 1969-12-08 NL NL6918399A patent/NL145738B/xx unknown
- 1969-12-08 JP JP9856269A patent/JPS5113962B1/ja active Pending
- 1969-12-11 CH CH1851669A patent/CH512862A/de not_active IP Right Cessation
- 1969-12-15 AT AT1164169A patent/AT296403B/de not_active IP Right Cessation
- 1969-12-15 BG BG1354969A patent/BG20634A3/xx unknown
- 1969-12-15 LU LU60014D patent/LU60014A1/xx unknown
- 1969-12-16 SE SE1736569A patent/SE346190B/xx unknown
- 1969-12-16 FR FR6943549A patent/FR2026348A1/fr not_active Withdrawn
- 1969-12-16 GB GB6115969A patent/GB1244548A/en not_active Expired
- 1969-12-17 BE BE743283D patent/BE743283A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NL145738B (nl) | 1975-04-15 |
| BG20634A3 (de) | 1975-12-05 |
| DE1815174B2 (de) | 1970-10-29 |
| DE1815174A1 (de) | 1970-06-18 |
| FR2026348A1 (de) | 1970-09-18 |
| LU60014A1 (de) | 1970-02-16 |
| BE743283A (de) | 1970-06-17 |
| SE346190B (de) | 1972-06-26 |
| NL6918399A (de) | 1970-06-19 |
| GB1244548A (en) | 1971-09-02 |
| AT296403B (de) | 1972-02-10 |
| DE1815173B1 (de) | 1970-08-20 |
| JPS5113962B1 (de) | 1976-05-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |