JPS6485432A - Automatic equalizer - Google Patents
Automatic equalizerInfo
- Publication number
- JPS6485432A JPS6485432A JP24070487A JP24070487A JPS6485432A JP S6485432 A JPS6485432 A JP S6485432A JP 24070487 A JP24070487 A JP 24070487A JP 24070487 A JP24070487 A JP 24070487A JP S6485432 A JPS6485432 A JP S6485432A
- Authority
- JP
- Japan
- Prior art keywords
- equalizer
- links
- automatic
- mean error
- square mean
- 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.)
- Pending
Links
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
PURPOSE:To realize an economical and excellent transmission characteristic by increasing the number of links of a stationary equalizer, and switching the number of links depending on long range and short range communication so as to retard and equalize the long range and short range communication. CONSTITUTION:An automatic equalizer corresponding to + or -3 link is used without any modification to select the number of links of a stationary equalizer 2. Then the number of links is switched selectively when the square mean error of a deciding device 4 of the automatic equalizer 3 is not converged. The automatic equalizer 3 is operated to minimize the square mean error of the device 4 by the adjustment of tap gain and since the tap gain is normally nearly + or -3 links as its limit, in case of the long range communication, even if the tap gain is adjusted to a maximum value, the square mean error is not converged. The tap gain limit and the square mean error are supplied to a control means to increase the number of links of the equalizer 2 to apply automatic equalization again, thereby applying optimized equalization. Thus, the delay equalizer effective to both the long range and short range communication is realized with economical and easy apply excellent transmission control by the automatic equalizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24070487A JPS6485432A (en) | 1987-09-28 | 1987-09-28 | Automatic equalizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24070487A JPS6485432A (en) | 1987-09-28 | 1987-09-28 | Automatic equalizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6485432A true JPS6485432A (en) | 1989-03-30 |
Family
ID=17063463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24070487A Pending JPS6485432A (en) | 1987-09-28 | 1987-09-28 | Automatic equalizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6485432A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6371080B1 (en) | 1999-05-10 | 2002-04-16 | Hitachi, Ltd. | Throttle device for internal-combustion engine |
| US6488010B2 (en) | 2000-01-18 | 2002-12-03 | Hitachi, Ltd. | Throttle device for internal-combustion engine |
-
1987
- 1987-09-28 JP JP24070487A patent/JPS6485432A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6371080B1 (en) | 1999-05-10 | 2002-04-16 | Hitachi, Ltd. | Throttle device for internal-combustion engine |
| US6390062B1 (en) | 1999-05-10 | 2002-05-21 | Hitachi, Ltd. | Throttle device of internal combustion engine |
| US6945228B2 (en) | 1999-05-10 | 2005-09-20 | Hitachi, Ltd. | Throttle device for internal-combustion engine |
| US6488010B2 (en) | 2000-01-18 | 2002-12-03 | Hitachi, Ltd. | Throttle device for internal-combustion engine |
| US6591809B2 (en) | 2000-01-18 | 2003-07-15 | Hitachi, Ltd. | Throttle device for internal-combustion engine |
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