ES8402684A1 - Perfeccionamientos en circuitos telefonicos de altavoz. - Google Patents
Perfeccionamientos en circuitos telefonicos de altavoz.Info
- Publication number
- ES8402684A1 ES8402684A1 ES517820A ES517820A ES8402684A1 ES 8402684 A1 ES8402684 A1 ES 8402684A1 ES 517820 A ES517820 A ES 517820A ES 517820 A ES517820 A ES 517820A ES 8402684 A1 ES8402684 A1 ES 8402684A1
- Authority
- ES
- Spain
- Prior art keywords
- outgoing
- incoming
- signal
- controlling
- path connected
- Prior art date
- 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
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Control Of Amplification And Gain Control (AREA)
- Telephone Function (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
PERFECCIONAMIENTOS EN TELEFONOS DE ALTAVOZ.CONSTA DE: A) UN PRIMER DISPOSITIVO PARA APLICAR UNA PRIMERA SEÑAL DESDE UN MICROFONO (1) A UNA LINEA TELEFONICA BIDIRECCIONAL (5); B) UN SEGUNDO DISPOSITIVO PARA APLICAR UNA SEGUNDA SEÑAL DE LA LINEA TELEFONICA (5) A UNA ALTAVOZ (9) CUYA SEGUNDA SEÑAL COMPRENDE UN VALOR REDUCIDO DE LA SEÑAL DEL MICROFONO (1); C) UN PRIMER Y SEGUNDO DISPOSITIVO PARA RENOVAR Y ALMACENAR REPRESENTACIONES DE CORRIENTE CONTINUA; D) APARATOS PARA COMPARAR DICHAS REPRESENTACIONES DE CORRIENTE CONTINUA Y PARA PROPORCIONAR UNA SEÑAL DE CONTROL DE GANANCIA CONRELACION A LAS MISMAS; E) APARATOS PARA AJUSTAR LA GANANCIA DEL PRIMER Y SEGUNDO DISPOSITIVO DE APLICACION DE ACUERDO CON LA SEÑAL DE CONTROL DE GANANCIA, PROPORCIONANDO TRAYECTOS DE TRANSMISION A LA LINEA TELEFONICA (5) Y AL ALTAVOZ (9).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA000403582A CA1181541A (en) | 1982-05-21 | 1982-05-21 | Loudspeaking telephone |
Publications (2)
Publication Number | Publication Date |
---|---|
ES517820A0 ES517820A0 (es) | 1984-02-01 |
ES8402684A1 true ES8402684A1 (es) | 1984-02-01 |
Family
ID=4122839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES517820A Expired ES8402684A1 (es) | 1982-05-21 | 1982-11-30 | Perfeccionamientos en circuitos telefonicos de altavoz. |
Country Status (9)
Country | Link |
---|---|
US (1) | US4527014A (es) |
JP (1) | JPS58210747A (es) |
CA (1) | CA1181541A (es) |
DE (1) | DE3243818A1 (es) |
ES (1) | ES8402684A1 (es) |
FR (1) | FR2527403A1 (es) |
GB (1) | GB2122454B (es) |
IT (1) | IT1205614B (es) |
MX (1) | MX153674A (es) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2155279A (en) * | 1984-03-03 | 1985-09-18 | Standard Telephones Cables Ltd | Cordless telephone |
FR2567344B1 (fr) * | 1984-07-05 | 1986-12-26 | Picart Lebas Telephones | Poste telephonique a ecoute amplifiee et a asservissement d'amplification |
US4685136A (en) * | 1984-12-24 | 1987-08-04 | Don Latshaw | Triphonic sound system |
JPH063950B2 (ja) * | 1985-02-28 | 1994-01-12 | 株式会社東芝 | 拡声電話装置 |
US4748665A (en) * | 1985-07-01 | 1988-05-31 | Rockwell International Corporation | Analog echo suppressor |
FI73341C (fi) * | 1985-08-06 | 1987-09-10 | Outel Oy | Mellanfoerstaerkare som anvaends i tvaoledningsfoerbindelser i ett valbart telefonnaet samt foerfarande foer reglering av dess foerstaerkning. |
US4720856A (en) * | 1986-09-02 | 1988-01-19 | Motorola, Inc. | Control circuit having a direct current control loop for controlling the gain of an attenuator |
GB8621758D0 (en) * | 1986-09-10 | 1986-10-15 | Cass Group Plc | Call devices |
CA1257027A (en) * | 1987-03-10 | 1989-07-04 | Rolf Meier | Compensation circuit for use with an integrating amplifier |
FR2618626B1 (fr) * | 1987-07-21 | 1994-04-29 | Thomson Semiconducteurs | Dispositif de commande pour poste telephonique " mains libres " |
US4991166A (en) * | 1988-10-28 | 1991-02-05 | Shure Brothers Incorporated | Echo reduction circuit |
US5353348A (en) * | 1993-05-14 | 1994-10-04 | Jrc International, Inc. | Double echo cancelling system |
JPH06338934A (ja) * | 1993-05-25 | 1994-12-06 | Exar Corp | 事象駆動型制御回路を有するスピーカーホーン |
US6223154B1 (en) * | 1998-07-31 | 2001-04-24 | Motorola, Inc. | Using vocoded parameters in a staggered average to provide speakerphone operation based on enhanced speech activity thresholds |
US7027790B2 (en) | 2001-08-10 | 2006-04-11 | Broadcom Corporation | Transceiver front-end |
DE102008017231A1 (de) * | 2008-04-04 | 2009-11-19 | S. Siedle & Söhne Telefon- und Telegrafenwerke OHG | Verfahren zum Betreiben einer Sende- und Empfangsvorrichtung und entsprechend ausgelegte Vorrichtung |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL267461A (es) * | 1960-10-04 | 1900-01-01 | ||
DE1208361B (de) * | 1963-07-05 | 1966-01-05 | Standard Elektrik Lorenz Ag | Schaltungsanordnung fuer sprachgesteuerte Lautfernsprechgeraete |
GB1406243A (en) * | 1971-10-28 | 1975-09-17 | Gen Electric Co Ltd | Loudspeaking telephone instruments |
IT980548B (it) * | 1973-03-12 | 1974-10-10 | Applic Elettro Telefoniche Snc | Ripetitore ad impedenza negativa per linee telefoniche |
US4115659A (en) * | 1977-06-16 | 1978-09-19 | Abram N. Spanel | Electroacoustical telephone adapter |
DE2822069C2 (de) * | 1978-05-20 | 1986-02-20 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Schaltungsanordnung für einen Abhörschutz bei sprachgesteuerten Freisprecheinrichtungen, insbesondere in Fernsprechapparaten |
JPS5923668B2 (ja) * | 1979-03-26 | 1984-06-04 | 沖電気工業株式会社 | 音声制御方式 |
DE3034569C2 (de) * | 1980-09-10 | 1983-10-27 | Siemens AG, 1000 Berlin und 8000 München | Sprachgesteuerte Lautfernsprechanlage |
US4400581A (en) * | 1980-11-03 | 1983-08-23 | Sava Jacobson | Incoming audio detection circuit for a speaker telephone |
-
1982
- 1982-05-21 CA CA000403582A patent/CA1181541A/en not_active Expired
- 1982-08-30 IT IT23041/82A patent/IT1205614B/it active
- 1982-09-17 US US06/419,484 patent/US4527014A/en not_active Expired - Fee Related
- 1982-11-11 MX MX195140A patent/MX153674A/es unknown
- 1982-11-26 DE DE19823243818 patent/DE3243818A1/de active Granted
- 1982-11-30 ES ES517820A patent/ES8402684A1/es not_active Expired
-
1983
- 1983-01-20 JP JP58008621A patent/JPS58210747A/ja active Pending
- 1983-05-19 FR FR8308754A patent/FR2527403A1/fr not_active Withdrawn
- 1983-05-20 GB GB08313956A patent/GB2122454B/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
IT8223041A0 (it) | 1982-08-30 |
US4527014A (en) | 1985-07-02 |
CA1181541A (en) | 1985-01-22 |
DE3243818C2 (es) | 1988-01-28 |
IT1205614B (it) | 1989-03-23 |
ES517820A0 (es) | 1984-02-01 |
GB2122454B (en) | 1985-11-20 |
GB2122454A (en) | 1984-01-11 |
MX153674A (es) | 1986-12-16 |
DE3243818A1 (de) | 1983-11-24 |
JPS58210747A (ja) | 1983-12-08 |
FR2527403A1 (fr) | 1983-11-25 |
GB8313956D0 (en) | 1983-06-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD1A | Patent lapsed |
Effective date: 20010402 |