NO774415L - Telefonsystem. - Google Patents
Telefonsystem.Info
- Publication number
- NO774415L NO774415L NO774415A NO774415A NO774415L NO 774415 L NO774415 L NO 774415L NO 774415 A NO774415 A NO 774415A NO 774415 A NO774415 A NO 774415A NO 774415 L NO774415 L NO 774415L
- Authority
- NO
- Norway
- Prior art keywords
- line
- amplifier
- microphone
- transistors
- telephone
- Prior art date
Links
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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
-
- 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
- H04M1/6025—Substation equipment, e.g. for use by subscribers including speech amplifiers implemented as integrated speech networks
-
- 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)
- Interface Circuits In Exchanges (AREA)
- Amplifiers (AREA)
- Telephone Function (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/754,430 US4071713A (en) | 1976-12-27 | 1976-12-27 | Telephone speech network |
Publications (1)
Publication Number | Publication Date |
---|---|
NO774415L true NO774415L (no) | 1978-06-28 |
Family
ID=25034762
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO774415A NO774415L (no) | 1976-12-27 | 1977-12-22 | Telefonsystem. |
Country Status (12)
Country | Link |
---|---|
US (1) | US4071713A (ja) |
JP (1) | JPS5382203A (ja) |
BE (1) | BE862118A (ja) |
DE (1) | DE2757100C2 (ja) |
DK (1) | DK577877A (ja) |
ES (1) | ES465474A1 (ja) |
FI (1) | FI773859A (ja) |
FR (1) | FR2375772A1 (ja) |
GB (1) | GB1576898A (ja) |
NL (1) | NL187376C (ja) |
NO (1) | NO774415L (ja) |
SE (1) | SE414260B (ja) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1546046A (en) * | 1976-12-03 | 1979-05-16 | Cselt Centro Studi Lab Telecom | Transmitting and receiving circuit for subscriber telephone sets |
CA1056970A (en) * | 1977-01-10 | 1979-06-19 | Northern Telecom Limited | Electronic network for telephone set |
DE2807304C2 (de) * | 1978-02-21 | 1982-07-01 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Schaltungsanordnung zum Verstärken eines in einer aus einer Teilnehmeranschlußleitung gespeisten Endstelle einer Fernmeldeanlage erzeugten Signals |
JPS5831122B2 (ja) * | 1979-01-19 | 1983-07-04 | 仁 伊藤 | 混合回路 |
US4400589A (en) * | 1979-05-21 | 1983-08-23 | United Networks, Inc. | Subscriber station network |
US4303805A (en) * | 1979-05-21 | 1981-12-01 | United Networks, Inc. | Subscriber station network |
US4354060A (en) * | 1979-07-26 | 1982-10-12 | Stromberg-Carlson Corporation | Electronic telephone |
JPS5660151A (en) * | 1979-10-22 | 1981-05-23 | Fujitsu Ltd | Level-compensating type handset unit |
DE2946306A1 (de) * | 1979-11-16 | 1981-05-21 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Verstaerkerschaltung mit vogebbarem wechselstrominnenwiderstand |
US4332984A (en) * | 1979-12-13 | 1982-06-01 | Bell Telephone Laboratories, Incorporated | Active speech network circuit for a telephone set |
JPS6041909B2 (ja) * | 1980-03-26 | 1985-09-19 | 日本電気株式会社 | 電話機通話回路網 |
DE3116262A1 (de) * | 1981-04-24 | 1982-11-11 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | "schaltungsanordnung zur erzeugung von steuergroessen aus dem schleifenstrom" |
IT1218851B (it) * | 1984-10-31 | 1990-04-24 | Ates Componenti Elettron | Circuito integrato per la trasmissione di segnali di tipo telefonico, con limitazione d'ampiezza dei picchi negativi delle forme d'onda dei segnali trasmessi |
JPS6243944A (ja) * | 1985-08-21 | 1987-02-25 | Toshiba Corp | 電話機回路 |
DE10051306A1 (de) * | 2000-10-17 | 2002-04-18 | Bosch Gmbh Robert | Spielfreies Lenkgetriebe |
US11469789B2 (en) | 2008-07-09 | 2022-10-11 | Secureall Corporation | Methods and systems for comprehensive security-lockdown |
US10128893B2 (en) | 2008-07-09 | 2018-11-13 | Secureall Corporation | Method and system for planar, multi-function, multi-power sourced, long battery life radio communication appliance |
WO2010006221A2 (en) | 2008-07-09 | 2010-01-14 | Secureall Corporation | Low power radio communication system |
US10447334B2 (en) | 2008-07-09 | 2019-10-15 | Secureall Corporation | Methods and systems for comprehensive security-lockdown |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3462560A (en) * | 1966-04-06 | 1969-08-19 | Bell Telephone Labor Inc | Subscriber telephone circuit with resistance hybrid sidetone balancing network |
US3440367A (en) * | 1966-05-06 | 1969-04-22 | Bell Telephone Labor Inc | Nonreactive antisidetone network for a telephone set |
US3762867A (en) * | 1967-11-17 | 1973-10-02 | Mohasco Ind Inc | Textile printing method |
US3955053A (en) * | 1971-09-30 | 1976-05-04 | Siemens Aktiengesellschaft | Integrated circuit arrangement for a telephone subscriber station |
BE789514A (fr) * | 1971-09-30 | 1973-03-29 | Siemens Ag | Circuit monolithique integrable pour branchement telephonique de postesd'abonne a alimentation centrale |
BE792329A (fr) * | 1971-12-09 | 1973-06-06 | Int Standard Electric Corp | Circuit de transmission electronique pour poste telephonique |
CA1031882A (en) * | 1976-01-12 | 1978-05-23 | Mevhibe G. Sencer | Telephone speech network for electronic sidetone suppression |
-
1976
- 1976-12-27 US US05/754,430 patent/US4071713A/en not_active Expired - Lifetime
-
1977
- 1977-11-21 GB GB48398/77A patent/GB1576898A/en not_active Expired
- 1977-12-09 NL NLAANVRAGE7713652,A patent/NL187376C/xx not_active IP Right Cessation
- 1977-12-14 FR FR7737680A patent/FR2375772A1/fr active Granted
- 1977-12-20 FI FI773859A patent/FI773859A/fi not_active Application Discontinuation
- 1977-12-21 BE BE183680A patent/BE862118A/xx unknown
- 1977-12-21 DE DE2757100A patent/DE2757100C2/de not_active Expired
- 1977-12-22 NO NO774415A patent/NO774415L/no unknown
- 1977-12-23 DK DK577877A patent/DK577877A/da unknown
- 1977-12-23 SE SE7714747A patent/SE414260B/sv not_active IP Right Cessation
- 1977-12-27 JP JP15661977A patent/JPS5382203A/ja active Granted
- 1977-12-27 ES ES465474A patent/ES465474A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB1576898A (en) | 1980-10-15 |
BE862118A (fr) | 1978-06-21 |
FR2375772A1 (fr) | 1978-07-21 |
JPS6145424B2 (ja) | 1986-10-08 |
NL187376C (nl) | 1991-09-02 |
FI773859A (fi) | 1978-06-28 |
DK577877A (da) | 1978-06-28 |
ES465474A1 (es) | 1978-09-16 |
DE2757100A1 (de) | 1978-07-06 |
JPS5382203A (en) | 1978-07-20 |
US4071713A (en) | 1978-01-31 |
FR2375772B1 (ja) | 1983-01-28 |
SE7714747L (sv) | 1978-06-28 |
SE414260B (sv) | 1980-07-14 |
NL7713652A (nl) | 1978-06-29 |
DE2757100C2 (de) | 1985-04-04 |
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