SE220518C1 - - Google Patents
Info
- Publication number
- SE220518C1 SE220518C1 SE1334662A SE1334662A SE220518C1 SE 220518 C1 SE220518 C1 SE 220518C1 SE 1334662 A SE1334662 A SE 1334662A SE 1334662 A SE1334662 A SE 1334662A SE 220518 C1 SE220518 C1 SE 220518C1
- Authority
- SE
- Sweden
Links
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15875961A | 1961-12-12 | 1961-12-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE220518C1 true SE220518C1 (https=) | 1968-05-14 |
Family
ID=22569584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1334662A SE220518C1 (https=) | 1961-12-12 | 1962-12-11 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3172960A (https=) |
| BE (1) | BE625902A (https=) |
| DE (1) | DE1180419B (https=) |
| FR (1) | FR1339862A (https=) |
| GB (1) | GB1029569A (https=) |
| SE (1) | SE220518C1 (https=) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3519765A (en) * | 1967-02-02 | 1970-07-07 | Seismograph Service Corp | Bidirectional amplifier |
| US3733441A (en) * | 1971-06-14 | 1973-05-15 | Electro Voice | Ambipolar microphone unit |
| US4151376A (en) * | 1977-01-24 | 1979-04-24 | Walker Equipment & Service Co. | Amplifier for telephone handset |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2763832A (en) * | 1951-07-28 | 1956-09-18 | Bell Telephone Labor Inc | Semiconductor circuit controlling device |
| BE521520A (https=) * | 1952-07-18 | |||
| US2924727A (en) * | 1953-05-27 | 1960-02-09 | Jr Walter H Manning | Transistor power supply |
| US2785231A (en) * | 1954-02-25 | 1957-03-12 | Bell Telephone Labor Inc | Telephone set with amplifier |
| US2816238A (en) * | 1955-08-18 | 1957-12-10 | Gen Dynamics Corp | Electronic switches |
| US2810081A (en) * | 1955-09-27 | 1957-10-15 | Gen Dynamics Corp | Electronic switch for selectively blocking or permitting the simultaneous transmission of signals in two channels |
| US2976431A (en) * | 1959-06-22 | 1961-03-21 | Gen Dynamics Corp | Blocking oscillator controlled twotransistor bilateral switch |
-
0
- BE BE625902D patent/BE625902A/xx unknown
- US US3172960D patent/US3172960A/en not_active Expired - Lifetime
-
1962
- 1962-11-13 DE DEW33320A patent/DE1180419B/de active Pending
- 1962-11-19 FR FR915900A patent/FR1339862A/fr not_active Expired
- 1962-12-04 GB GB45725/62A patent/GB1029569A/en not_active Expired
- 1962-12-11 SE SE1334662A patent/SE220518C1/sl unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE625902A (https=) | |
| DE1180419B (de) | 1964-10-29 |
| FR1339862A (fr) | 1963-10-11 |
| GB1029569A (en) | 1966-05-18 |
| US3172960A (en) | 1965-03-09 |