AU4717179A - Echo suppressor - Google Patents
Echo suppressorInfo
- Publication number
- AU4717179A AU4717179A AU47171/79A AU4717179A AU4717179A AU 4717179 A AU4717179 A AU 4717179A AU 47171/79 A AU47171/79 A AU 47171/79A AU 4717179 A AU4717179 A AU 4717179A AU 4717179 A AU4717179 A AU 4717179A
- Authority
- AU
- Australia
- Prior art keywords
- path
- tone
- control circuit
- control
- echo suppressor
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Fats And Perfumes (AREA)
- Lubricants (AREA)
- Detergent Compositions (AREA)
Abstract
1. Echo suppressor comprising a comparator circuit (8) for the level-dependent control of the transmitting path and receiving path, and a control circuit which carries out the control, and a tone receiver (15, 17, 19) which is connected at the input end to the transmitting path and receiving path and at the output end to the control circuit, for blocking the control circuit, characterised in that the input of the tone receiver (15) is connected via a change-over switch (18), which is controlled in dependence upon the output of the comparator circuit (8), to the transmitting path when a tone voltage is present on the transmitting path and to the receiving path when a tone voltage is present on the receiving path.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2821743A DE2821743C2 (en) | 1978-05-18 | 1978-05-18 | Echo lock |
DE28217438 | 1978-05-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
AU4717179A true AU4717179A (en) | 1979-11-22 |
AU517093B2 AU517093B2 (en) | 1981-07-09 |
Family
ID=6039651
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU47171/79A Ceased AU517093B2 (en) | 1978-05-18 | 1979-05-17 | Echo suppressor |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0005759B1 (en) |
AT (1) | ATE34T1 (en) |
AU (1) | AU517093B2 (en) |
DE (2) | DE2821743C2 (en) |
DK (1) | DK204179A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3332006C2 (en) * | 1983-09-05 | 1987-01-15 | Hartmann & Braun Ag, 6000 Frankfurt | Bidirectional regenerator for serial pulse sequences transmitted in blocks |
-
1978
- 1978-05-18 DE DE2821743A patent/DE2821743C2/en not_active Expired
-
1979
- 1979-05-15 EP EP79101478A patent/EP0005759B1/en not_active Expired
- 1979-05-15 AT AT79101478T patent/ATE34T1/en not_active IP Right Cessation
- 1979-05-15 DE DE7979101478T patent/DE2960232D1/en not_active Expired
- 1979-05-17 AU AU47171/79A patent/AU517093B2/en not_active Ceased
- 1979-05-17 DK DK204179A patent/DK204179A/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE2821743C2 (en) | 1980-07-17 |
DE2821743B1 (en) | 1979-11-08 |
DK204179A (en) | 1979-11-19 |
DE2960232D1 (en) | 1981-04-23 |
EP0005759B1 (en) | 1981-04-01 |
ATE34T1 (en) | 1981-04-15 |
AU517093B2 (en) | 1981-07-09 |
EP0005759A1 (en) | 1979-12-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
MY112932A (en) | Input switching control device and communication circuit | |
AU517093B2 (en) | Echo suppressor | |
JPS5658306A (en) | Automatic gain control circuit | |
JPS5380132A (en) | Signal control circuit | |
JPS553298A (en) | Circuit device for transmitting signal of shield potential without ground in communication facility | |
JPS57147328A (en) | Input circuit | |
JPS5533326A (en) | Remote control device | |
GR76934B (en) | ||
AU529008B2 (en) | Pin diode switches | |
JPS56123110A (en) | Muting circuit | |
JPS5784675A (en) | Facsimile absence receiver | |
JPS5748832A (en) | Signal selection circuit | |
JPS57197920A (en) | Signal transferring circuit | |
EP0219338A3 (en) | Digital color signal processing circuit | |
JPS5591250A (en) | Digital communication device | |
JPS55140316A (en) | Voltage control high frequency variable attenuation device | |
JPS5496314A (en) | Electronic device | |
JPS5686568A (en) | Communication device | |
JPS5456310A (en) | Transmitter/receiver | |
JPS5297614A (en) | Control circuit | |
JPS57124940A (en) | Voltage level converting circuit | |
JPS57184340A (en) | Switching circuit of receiver | |
JPS57143937A (en) | Output controlling system | |
JPS5754450A (en) | Bidirectional signal transmission circuit | |
JPS574654A (en) | Facsimile simple multiple address device |