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| 型號(hào)： | CXD2586R-1 |
| 廠(chǎng)商： | Sony Corporation |
| 元件分類(lèi)： | 數(shù)字信號(hào)處理 |
| 英文描述： | CD Digital Signal Processor with Built-in Digital Servo and DAC |
| 中文描述： | CD數(shù)字信號(hào)處理器，具有內(nèi)置數(shù)字伺服和DAC |
| 文件頁(yè)數(shù)： | 97/127頁(yè) |
| 文件大小： | 1694K |
| 代理商： | CXD2586R-1 |
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– 97 –
CXD2586R/-1
§5-12. Brake Circuit
Immediately after a long distance track jump it tends to be hard for the actuator to settle and for the servo to
turn on.
The brake circuit prevents these phenomenon.
In principle, this circuit cuts unnecessary portions of the tracking drive and works it as the brake by utilizing the
180° offset in the RF envelope and tracking error phase relationship which occurs when the actuator traverses
the track in the radial direction from the inner track to the outer track and vice versa. (See Figs. 5-15 and 5-16.)
Concretely, this operation is achieved by masking the tracking drive using the TRKCNCL signal generated by
loading the MIRR signal at the edge of the TZC (Tracking Zero Cross) signal.
The brake circuit can be turned on and off by D18 of $1. (See Fig. 5-17.)
TRK
DRV
FWD
JMP
REV
RF
Trace
MIRR
TE
0
0
TZC
Edge
TRKCNCL
TRK
DRV
SENS
TZC out
Inner track Outer track
TRK
DRV
REV
JMP
JMPServo ON
RF
Trace
MIRR
TE
0
0
TZC
Edge
TRKCNCL
TRK
DRV
SENS
TZC out
Outer track Inner track
Fig. 5-15.
Fig. 5-16.
1 0
0
1
0
0
1
1
0
ANTI SHOCK ON
ANTI SHOCK OFF
BRAKE ON
BRAKE OFF
TRACKING GAIN NORMAL
TRACKING GAIN UP
TRACKING GAIN UP FILTER SELECT 1
TRACKING GAIN UP FILTER SELECT 2
0 0 0 1
TRACKING
CONTROL
1
Fig. 5-17.
: Don’t care
Register
name
Command
D23 to D20
D19 to D16
相關(guān)PDF資料 |
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| CXD2587 | RESISTOR,MIL-PRF-39007/9 |
| CXD2587Q | CD Digital Signal Processor with Built-in Digital Servo and DAC |
| CXD2588Q | RESISTOR,MIL-PRF-39007/9 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CXD2587 | 制造商:SONY 制造商全稱(chēng):Sony Corporation 功能描述:CD Digital Signal Processor with Built-in Digital Servo and DAC |
| CXD2587Q | 制造商:SONY 制造商全稱(chēng):Sony Corporation 功能描述:CD Digital Signal Processor with Built-in Digital Servo and DAC |
| CXD2588Q | 制造商:SONY 制造商全稱(chēng):Sony Corporation 功能描述:CD Digital Signal Processor with Built-in Digital Servo and DAC |
| CXD2588Q/R | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:CD Digital Signal Processor with Built-in DigitalServo and DAC |
| CXD2588R | 制造商:SONY 制造商全稱(chēng):Sony Corporation 功能描述:CD Digital Signal Processor with Built-in Digital Servo and DAC |
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