FR2043236A5 - - Google Patents
Info
- Publication number
- FR2043236A5 FR2043236A5 FR7013211A FR7013211A FR2043236A5 FR 2043236 A5 FR2043236 A5 FR 2043236A5 FR 7013211 A FR7013211 A FR 7013211A FR 7013211 A FR7013211 A FR 7013211A FR 2043236 A5 FR2043236 A5 FR 2043236A5
- Authority
- FR
- France
- 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
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)
- Interface Circuits In Exchanges (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19691919111 DE1919111B1 (de) | 1969-04-15 | 1969-04-15 | Schaltungsanordnung fuer einen Transistorhoerverstaerker mit Daempfungsausgleich in Fernsprechteilnehmerstellen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2043236A5 true FR2043236A5 (fr) | 1971-02-12 |
Family
ID=5731277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7013211A Expired FR2043236A5 (fr) | 1969-04-15 | 1970-04-13 |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US3748400A (fr) |
| AT (1) | AT300052B (fr) |
| BE (1) | BE748983A (fr) |
| CH (1) | CH508319A (fr) |
| DE (1) | DE1919111B1 (fr) |
| FR (1) | FR2043236A5 (fr) |
| GB (1) | GB1271310A (fr) |
| LU (1) | LU60705A1 (fr) |
| NL (1) | NL7004911A (fr) |
| SE (1) | SE348912B (fr) |
| ZA (1) | ZA702487B (fr) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE380699B (sv) * | 1974-03-05 | 1975-11-10 | Ericsson Telefon Ab L M | Elektronisk talkrets for en centralbatterimatad telefonapparat. |
| IT1024529B (it) * | 1974-03-21 | 1978-07-20 | Sits Soc It Telecom Siemens | Forchetta telefonica simmetrica |
| US4081622A (en) * | 1976-10-29 | 1978-03-28 | Technex International Ltd. | Electronic circuit for a speakerphone |
| GB1546046A (en) * | 1976-12-03 | 1979-05-16 | Cselt Centro Studi Lab Telecom | Transmitting and receiving circuit for subscriber telephone sets |
| JPS6041909B2 (ja) * | 1980-03-26 | 1985-09-19 | 日本電気株式会社 | 電話機通話回路網 |
| US4518829A (en) * | 1984-04-02 | 1985-05-21 | Gte Communications Systems Corporation | Two terminal microphone active load gain regulation circuit |
| KR100200967B1 (ko) * | 1996-06-26 | 1999-06-15 | 윤종용 | 전화라인의 감쇄신호 보상장치 및 방법 |
-
1969
- 1969-04-15 DE DE19691919111 patent/DE1919111B1/de not_active Withdrawn
- 1969-12-16 GB GB61160/69A patent/GB1271310A/en not_active Expired
-
1970
- 1970-04-06 NL NL7004911A patent/NL7004911A/xx unknown
- 1970-04-13 FR FR7013211A patent/FR2043236A5/fr not_active Expired
- 1970-04-13 LU LU60705D patent/LU60705A1/xx unknown
- 1970-04-13 CH CH542670A patent/CH508319A/de not_active IP Right Cessation
- 1970-04-13 AT AT336470A patent/AT300052B/de not_active IP Right Cessation
- 1970-04-13 SE SE05019/70A patent/SE348912B/xx unknown
- 1970-04-14 ZA ZA702487A patent/ZA702487B/xx unknown
- 1970-04-15 BE BE748983D patent/BE748983A/fr unknown
-
1972
- 1972-07-20 US US00273536A patent/US3748400A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| NL7004911A (fr) | 1970-10-19 |
| BE748983A (fr) | 1970-10-15 |
| ZA702487B (en) | 1971-03-31 |
| GB1271310A (en) | 1972-04-19 |
| CH508319A (de) | 1971-05-31 |
| US3748400A (en) | 1973-07-24 |
| DE1919111B1 (de) | 1970-10-29 |
| LU60705A1 (fr) | 1970-06-15 |
| AT300052B (de) | 1972-07-10 |
| SE348912B (fr) | 1972-09-11 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |