RO80670A - Circuit de amplificator de microfon telefonic - Google Patents
Circuit de amplificator de microfon telefonicInfo
- 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
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)
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 (ro) |
DD (1) | DD138260B1 (ro) |
DE (1) | DE2922693C2 (ro) |
HU (1) | HU184627B (ro) |
RO (1) | RO80670A (ro) |
Family Cites Families (2)
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 |
-
1978
- 1978-08-03 DD DD20710578A patent/DD138260B1/de not_active IP Right Cessation
-
1979
- 1979-06-02 DE DE19792922693 patent/DE2922693C2/de not_active Expired
- 1979-07-19 RO RO7998202A patent/RO80670A/ro unknown
- 1979-08-02 HU HUFE001050 patent/HU184627B/hu not_active IP Right Cessation
- 1979-08-02 CU CU35117A patent/CU21084A/es unknown
Also Published As
Publication number | Publication date |
---|---|
DD138260A1 (de) | 1979-10-17 |
DD138260B1 (de) | 1981-10-28 |
DE2922693A1 (de) | 1980-02-14 |
HU184627B (en) | 1984-09-28 |
CU21084A (es) | 1982-03-28 |
DE2922693C2 (de) | 1987-03-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
BE875773A (nl) | 2'deoxy-5-(halogeenvinyl)-uridines | |
FR2473728B1 (fr) | Circuit limiteur d'amplitude | |
FR2416600B1 (fr) | Circuit de ligne telephonique | |
JPS5560317A (en) | Bridged amplifier circuit | |
IT7949309A0 (it) | Apparecchio d'annaffiamento mobile | |
MA18790A1 (fr) | Transmetteur telephonique d'alarme | |
DE2966471D1 (en) | Amplifier circuit | |
FR2460078B1 (fr) | Joncteur d'abonne electronique | |
BE887857A (fr) | Circuit d'amplification | |
BR7900996A (pt) | Aparelho telefonico | |
IT7868269A0 (it) | Circuito telefonico elettronico dilinea d'utente | |
IT1122597B (it) | Rele'senza contatti | |
LU81071A1 (fr) | Vitrai 12 | |
SE7907728L (sv) | Telefonsvarssystem | |
BR7900997A (pt) | Monofone telefonico | |
FI790141A (fi) | 2 6-dinitrobensenaminer | |
JPS54150058A (en) | Amplifier circuit | |
IT1122309B (it) | Rele'elettromagnetico | |
RO80670A (ro) | Circuit de amplificator de microfon telefonic | |
FR2437743B1 (fr) | Dispositif amplificateur de voix | |
BE884175A (fr) | Combine telephonique | |
NL7900005A (nl) | 11-alkanoyl-4"-desoxy-4"-isonitrilo-oleandomycine-deri- vaten. | |
IT1122153B (it) | Rele'elettromagnetico | |
FR2456693B1 (fr) | Circuit d'arrangement | |
IT1119070B (it) | S(3metil 2 butenil)cisteina |