FR2173899A1 - - Google Patents
Info
- Publication number
- FR2173899A1 FR2173899A1 FR7239766A FR7239766A FR2173899A1 FR 2173899 A1 FR2173899 A1 FR 2173899A1 FR 7239766 A FR7239766 A FR 7239766A FR 7239766 A FR7239766 A FR 7239766A FR 2173899 A1 FR2173899 A1 FR 2173899A1
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/46—One-port networks
- H03H11/48—One-port networks simulating reactances
- H03H11/485—Simulating inductances using operational amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/46—One-port networks
- H03H11/52—One-port networks simulating negative resistances
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (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 |
|---|---|---|---|
| IT21157/72A IT951804B (it) | 1972-02-29 | 1972-02-29 | Traslatore per linee telefoniche |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2173899A1 true FR2173899A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1973-10-12 |
| FR2173899B1 FR2173899B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1976-10-29 |
Family
ID=11177593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7239766A Expired FR2173899B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1972-02-29 | 1972-11-09 |
Country Status (7)
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0022938A1 (fr) * | 1979-07-20 | 1981-01-28 | International Business Machines Corporation | Dispositif pour augmenter l'inductance parallèle des transformateurs de lignes téléphoniques |
| EP0035180A3 (de) * | 1980-02-29 | 1982-08-18 | Siemens Aktiengesellschaft | Schaltungsanordnung zur Erhöhung der Induktivität eines Übertragers |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51113439A (en) * | 1975-03-28 | 1976-10-06 | Yokogawa Hokushin Electric Corp | Negative impedance circuit |
| US5740241A (en) * | 1995-05-12 | 1998-04-14 | Carrier Access Corporation | T1 channel bank control process and apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2855575A (en) * | 1955-08-10 | 1958-10-07 | Telefonica Interregionale Piem | Negative impedance amplifier with separate input and output particularly for telephone systems |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2941041A (en) * | 1955-10-25 | 1960-06-14 | Philips Corp | Arrangement for transmitting audiofrequency signals and ringing signals below the audio-frequency band |
| US3061790A (en) * | 1960-02-16 | 1962-10-30 | Rca Corp | Signal detectors |
| US3108231A (en) * | 1960-02-29 | 1963-10-22 | Rca Corp | Negative resistance amplifier |
| US3243740A (en) * | 1960-10-20 | 1966-03-29 | Westinghouse Electric Corp | Reactance enhancing networks |
| US3344285A (en) * | 1965-01-19 | 1967-09-26 | Tektronix Inc | Ramp generator and comparator circuit employing non-saturating gate |
| US3493901A (en) * | 1968-03-05 | 1970-02-03 | Nasa | Gyrator type circuit |
| CA939016A (en) * | 1972-02-02 | 1973-12-25 | T. Lim Jin | Active delay-equalizer network |
-
0
- BE BE790791D patent/BE790791A/xx unknown
-
1972
- 1972-02-29 IT IT21157/72A patent/IT951804B/it active
- 1972-11-09 FR FR7239766A patent/FR2173899B1/fr not_active Expired
- 1972-11-22 GB GB5385872A patent/GB1405166A/en not_active Expired
-
1973
- 1973-02-13 DE DE2307015A patent/DE2307015A1/de active Pending
- 1973-02-22 NL NL7302513A patent/NL7302513A/xx not_active Application Discontinuation
- 1973-02-28 US US00336717A patent/US3843943A/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2855575A (en) * | 1955-08-10 | 1958-10-07 | Telefonica Interregionale Piem | Negative impedance amplifier with separate input and output particularly for telephone systems |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0022938A1 (fr) * | 1979-07-20 | 1981-01-28 | International Business Machines Corporation | Dispositif pour augmenter l'inductance parallèle des transformateurs de lignes téléphoniques |
| FR2462006A1 (fr) * | 1979-07-20 | 1981-02-06 | Ibm France | Dispositif pour augmenter l'inductance parallele d'un transformateur |
| EP0035180A3 (de) * | 1980-02-29 | 1982-08-18 | Siemens Aktiengesellschaft | Schaltungsanordnung zur Erhöhung der Induktivität eines Übertragers |
Also Published As
| Publication number | Publication date |
|---|---|
| BE790791A (fr) | 1973-02-15 |
| IT951804B (it) | 1973-07-10 |
| NL7302513A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1973-08-31 |
| GB1405166A (en) | 1975-09-03 |
| US3843943A (en) | 1974-10-22 |
| DE2307015A1 (de) | 1973-10-04 |
| FR2173899B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1976-10-29 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |