GB849530A - Telephone apparatus employing transistor amplifiers - Google Patents
Telephone apparatus employing transistor amplifiersInfo
- Publication number
- GB849530A GB849530A GB35707/57A GB3570757A GB849530A GB 849530 A GB849530 A GB 849530A GB 35707/57 A GB35707/57 A GB 35707/57A GB 3570757 A GB3570757 A GB 3570757A GB 849530 A GB849530 A GB 849530A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplifier
- transistor
- subscriber
- nov
- resistor
- Prior art date
- 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.)
- Expired
Links
- 229910052732 germanium Inorganic materials 0.000 abstract 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 abstract 1
- 229910010271 silicon carbide Inorganic materials 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/738—Interface circuits for coupling substations to external telephone lines
- H04M1/76—Compensating for differences in line impedance
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US358833XA | 1956-11-28 | 1956-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB849530A true GB849530A (en) | 1960-09-28 |
Family
ID=21885349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB35707/57A Expired GB849530A (en) | 1956-11-28 | 1957-11-15 | Telephone apparatus employing transistor amplifiers |
Country Status (5)
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3126454A (en) * | 1959-08-31 | 1964-03-24 | Telephone instrument | |
| NL271741A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1960-11-24 | |||
| NL271744A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1960-11-24 | |||
| NL271742A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1960-11-24 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE678028C (de) * | 1931-10-05 | 1939-07-07 | Stabilovolt G M B H | Schaltung fuer Elektronenroehren zur Abnahme einer negativen Gittervorspannung |
| AT193438B (de) * | 1955-11-03 | 1957-11-25 | Kapsch Telephon Telegraph | Fernsprechstation mit Verstärker |
-
0
- BE BE562469D patent/BE562469A/xx unknown
-
1957
- 1957-11-15 GB GB35707/57A patent/GB849530A/en not_active Expired
- 1957-11-15 CH CH358833D patent/CH358833A/de unknown
- 1957-11-16 FR FR1188597D patent/FR1188597A/fr not_active Expired
- 1957-11-22 DE DEG23409A patent/DE1089418B/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE1089418B (de) | 1960-09-22 |
| CH358833A (de) | 1961-12-15 |
| FR1188597A (fr) | 1959-09-23 |
| BE562469A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
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