參數資料
型號: CXD3068Q
廠商: Sony Corporation
元件分類: 數字信號處理
英文描述: CD Digital Signal Processor with Built-in Digital Servo(CD數字信號處理器(內置數字伺服系統(tǒng)))
中文描述: CD數字信號處理器具有內置的數字式伺服(光盤數字信號處理器(內置數字伺服系統(tǒng)))
文件頁數: 98/135頁
文件大小: 1259K
代理商: CXD3068Q
– 98 –
CXD3068Q
§ 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, the brake circuit uses the tracking drive as a brake by cutting the unnecessary portions 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.)
In addition, the low frequency for the tracking drive after masking can be boosted. (SFBK1, 2 of $34B)
Fig. 5-15
Fig. 5-16
Register
name
Command
D23 to D20
D19 to D16
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
Table 5-17
: Don't care
TRK
DRV
FWD
JMP
REV
RF
Trace
MIRR
TE
0
TZC
Edge
TRKCNCL
0
TRK DRV
(SFBK OFF)
SENS
TZC out
Inner track Outer track
0
TRK DRV
(SFBK ON)
TRK
DRV
REV
JMP
JMPServo ON
RF
Trace
MIRR
TE
0
TZC
Edge
TRKCNCL
0
TRK DRV
(SFBK OFF)
SENS
TZC out
Outer track Inner track
0
TRK DRV
(SFBK ON)
相關PDF資料
PDF描述
CXD3152AR Signal Processor LSI for Single-chip CCD B/W Camera
CXD3400 6-channel CCD Vertical Clock Driver
CXD3400N Silver Mica Capacitor; Capacitance:30000pF; Capacitance Tolerance: 2%; Series:CD42; Voltage Rating:500VDC; Capacitor Dielectric Material:Mica; Termination:Radial Leaded; Lead Pitch:27mm; Leaded Process Compatible:No RoHS Compliant: No
CXD3410 Timing Generator and Signal Processor for Frame Readout CCD Image Sensor
CXD3410GA Timing Generator and Signal Processor for Frame Readout CCD Image Sensor
相關代理商/技術參數
參數描述
CXD3141 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ccd-cmosIC資料
CXD3142R 制造商:SONY 制造商全稱:Sony Corporation 功能描述:Signal Processor LSI for Single-Chip CCD Color Camera
CXD3152AR 制造商:SONY 制造商全稱:Sony Corporation 功能描述:Signal Processor LSI for Single-chip CCD B/W Camera
CXD3152R 制造商:SONY 制造商全稱:Sony Corporation 功能描述:Signal Processor LSI for Single-chip CCD B/W Camera
CXD3172AR 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Signal Processor LSI for Single CCD Color Camera