BE726659A - - Google Patents
Info
- Publication number
- BE726659A BE726659A BE726659DA BE726659A BE 726659 A BE726659 A BE 726659A BE 726659D A BE726659D A BE 726659DA BE 726659 A BE726659 A BE 726659A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/58—Anti-side-tone circuits
- H04M1/585—Anti-side-tone circuits implemented without inductive element
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephonic Communication Services (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Networks Using Active Elements (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US69778568A | 1968-01-15 | 1968-01-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE726659A true BE726659A (fi) | 1969-06-16 |
Family
ID=24802527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE726659D BE726659A (fi) | 1968-01-15 | 1969-01-09 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3546395A (fi) |
| BE (1) | BE726659A (fi) |
| DE (1) | DE1901337B2 (fi) |
| ES (1) | ES362693A1 (fi) |
| FR (1) | FR1604184A (fi) |
| GB (1) | GB1242312A (fi) |
| NL (1) | NL6900563A (fi) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS495645B1 (fi) * | 1970-02-07 | 1974-02-08 | ||
| JPS5211166B1 (fi) * | 1970-07-23 | 1977-03-29 | ||
| GB1350205A (en) * | 1970-07-24 | 1974-04-18 | Post Office | Telephone subscribers instrument circuits |
| JPS5148006B1 (fi) * | 1970-09-03 | 1976-12-18 | ||
| US3899646A (en) * | 1974-05-28 | 1975-08-12 | Bell Telephone Labor Inc | Telephone set speech network |
| US3952160A (en) * | 1974-11-14 | 1976-04-20 | Bell Telephone Laboratories, Incorporated | Coin telephone arrangement to obviate acoustically coupled fraud |
| BE841105A (nl) * | 1976-04-26 | 1976-10-26 | Telekommunikatie toestel | |
| GB1546046A (en) * | 1976-12-03 | 1979-05-16 | Cselt Centro Studi Lab Telecom | Transmitting and receiving circuit for subscriber telephone sets |
| US4081620A (en) * | 1977-05-20 | 1978-03-28 | Bell Telephone Laboratories, Incorporated | Sidetone control circuit for a telephone set |
| JPS5831122B2 (ja) * | 1979-01-19 | 1983-07-04 | 仁 伊藤 | 混合回路 |
| US4332984A (en) * | 1979-12-13 | 1982-06-01 | Bell Telephone Laboratories, Incorporated | Active speech network circuit for a telephone set |
-
1968
- 1968-01-15 US US697785A patent/US3546395A/en not_active Expired - Lifetime
- 1968-12-30 FR FR1604184D patent/FR1604184A/fr not_active Expired
-
1969
- 1969-01-09 ES ES362693A patent/ES362693A1/es not_active Expired
- 1969-01-09 BE BE726659D patent/BE726659A/xx unknown
- 1969-01-11 DE DE19691901337 patent/DE1901337B2/de active Pending
- 1969-01-14 NL NL6900563A patent/NL6900563A/xx unknown
- 1969-01-14 GB GB2134/69A patent/GB1242312A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ES362693A1 (es) | 1970-12-16 |
| NL6900563A (fi) | 1969-07-17 |
| US3546395A (en) | 1970-12-08 |
| GB1242312A (en) | 1971-08-11 |
| DE1901337A1 (de) | 1969-07-24 |
| FR1604184A (fi) | 1971-07-26 |
| DE1901337B2 (de) | 1971-06-16 |