MN66279RSC Datasheet, PDF (26/96 Pages) Panasonic Semiconductor – LSI FOR COMPACT DISC/CD ROM PLAYER

MN662790RSC


(B) Setting of the optical servo characteristics including the characteristics for anti-vibration
ɾGain constant
ɹɹɹFocus gain mantissa part
ɹFG ɹɹTracking gain mantissa part
ɹɹɹFocus gain exponent part
ɹFEXP ɹɹTracking gain exponent part
ɹɹT G
ɹɹTEXP
ɾPhase compensation and low-band compensation constant
Focus phase compensation constant ɹFC ɹɹTracking phase compensation constant ɹɹTC
Focus low-band compensation constant ɹFR ɹɹTracking low-band compensation constantɹTR
The above eight constants can be set by writing 8-bit data (0 to 127) directly with the microcomputer
command.
Structure
K
Z ^-1
+^Ê´
R
Ê´
Ì­
Ê´₊
ʵ
+^Ê´
G
Ê´
Ì®
C
Z ^-N
ɾfs of the focus system: 44.1 kHz
ɾfs of the tracking system: 44.1 kHz
(fs of the low-band compensation filter is 22.05 kHz.)
ʨɹɹɹɹ ʩ ^G
(Z)
1
ʹGɹɹ₁ɹʵɹ_Zʵɹ₁ Ê·R
Ê´
(1ʵCʷZ^ʵN)
G= ^{TG or FG}
TEXP
FEXP
R= ^{TR or FR}
2¹⁵
2¹⁵
Kʹ1
C= ^{TC or FC}
128
128
N in Z^ʵN can be replaced with :
always 2 in case of the focus system.
1 in case of the tracking system.
SDD00025AEM
26