參數(shù)資料
型號(hào): CXD2597Q
廠商: Sony Corporation
元件分類: 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
文件頁數(shù): 85/115頁
文件大小: 881K
代理商: CXD2597Q
– 85 –
CXD2597Q
§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.
The brake circuit is to use tracking drive as a brake by cutting unnecessary portions of it 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
JMPServo ON
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.
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
Fig. 5-17.
: Don’t care
Register name
Command
相關(guān)PDF資料
PDF描述
CXD2720Q-2 CAP 10UF 50V 20% TANT SMD-7343-43 TR-13 GOLD
CXD2724AQ-1 Single-Chip Dolby Pro Logic Surround Decoder
CXD2917 DIGITAL AUDIO DATA MODULATION AND TRANSMISSION
CXD2917Q DIGITAL AUDIO DATA MODULATION AND TRANSMISSION
CXD2951GA-4 Single Chip GPS LSI
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CXD2598 制造商:SONY 制造商全稱:Sony Corporation 功能描述:CD Digital Signal Processor with Built-in Digital Servo and DAC
CXD2598Q 制造商:SONY 制造商全稱:Sony Corporation 功能描述:CD Digital Signal Processor with Built-in Digital Servo and DAC
CXD2719Q 制造商:SONY 制造商全稱:Sony Corporation 功能描述:Single-Chip Dolby Pro Logic Surround Decoder
CXD2720Q 制造商:SONY 制造商全稱:Sony Corporation 功能描述:Single-Chip Digital Signal Processor for Karaoke
CXD2720Q-2 制造商:SONY 制造商全稱:Sony Corporation 功能描述:Single-Chip Dolby Pro Logic Surround Decoder