CXD3018Q/R
§4-7. Digital CLV
Fig. 4-11 shows the block diagram. Digital CLV outputs MDS error and MDP error with PWM, with the sampling
frequency increased up to 130kHz during normal-speed playback in CLVS, CLVP and other modes.
In addition, the digital spindle servo gain is variable.
Digital CLV
CLVS U/D
MDS Error
Measure
MDP Error
Measure
Oversampling
Filter-1
2/1 MUX
CLV P/S
Gain
MDS
Gain
MDP
1/2
MUX
CLV P/S
Oversampling
Filter-2
Noise Shape
Modulation
KICK, BRAKE, STOP
PWMI
Mode Select
DCLVMD, LPWR
MDS
MDP
CLVS U/D : Up/down signal from CLVS servo
MDS error : Frequency error for CLVP servo
MDP error : Phase error for CLVP servo
PWMI
: Spindle drive signal from the microcomputer
Fig. 4-11. Block Diagram
– 76 –
ETC [ ETC ]
