參數(shù)資料
型號(hào)： SAA7326H
廠商： NXP SEMICONDUCTORS
元件分類： 消費(fèi)家電
英文描述： CABLE ASSEMBLY; TNC MALE TO TNC MALE; 75 OHM, RG59B/U COAX; 12" CABLE LENGTH; *USES STANDARD 50 OHM INTERFACE CONNECTORS*
中文描述： SPECIALTY CONSUMER CIRCUIT, PQFP64
封裝： PLASTIC, SOT-393-1, QFP-64
文件頁(yè)數(shù)： 28/68頁(yè)
文件大?。?/td> 391K
代理商： SAA7326H
1999 Jun 17
28
Philips Semiconductors
Product specification
Digital servo processor and Compact Disc
decoder with integrated DAC (CD10)
SAA7326
Fig.20 Detector arrangement.
handbook, full pagewidth
D3
D1
D2
SATELLITE
DIODE R1
SATELLITE
DIODE R2
D1
D3
D2
D4
SATELLITE
DIODE R1
SATELLITE
DIODE R2
D1
D2
D3
D4
SATELLITE
DIODE R1
SATELLITE
DIODE R2
single Foucault
astigmatic focus
double Foucault
MBG422
7.14.3
F
OCUS SERVO SYSTEM
7.14.3.1
Focus start-up
Five initially loaded coefficients influence the start-up
behaviour of the focus controller. The automatically
generated triangular voltage can be influenced by
3 parameters; for height (ramp_height) and DC offset
(ramp_offset) of the triangle and its steepness
(ramp_incr).
For protection against false focus point detections two
parameters are available which are an absolute level on
the CA signal (CA_start) and a level on the FE
n
signal
(FE_start). When this CA level is reached the FOK signal
becomes true.
If the FOK signal is true and the level on the FE
n
signal is
reached, the focus PID is enabled to switch-on when the
next zero crossing is detected in the FE
n
signal.
7.14.3.2
Focus position control loop
The focus control loop contains a digital PID controller
which has 5 parameters that are available to the user.
These coefficients influence the integrating (foc_int),
proportional (foc_lead_length, part of foc_parm3) and
differentiating (foc_pole_lead, part of foc_parm1) action of
the PID and a digital low-pass filter (foc_pole_noise, part
of foc_parm2) following the PID. The fifth coefficient
foc_gain influences the loop gain.
7.14.3.3
Dropout detection
This detector can be influenced by one parameter
(CA_drop). The FOK signal will become false and the
integrator of the PID will hold if the CA signal drops below
this programmable absolute CA level. When the FOK
signal becomes false it is assumed, initially, to be caused
by a black dot.
相關(guān)PDF資料
PDF描述
SAA7327 Digital servo processor and Compact Disc decoder with integrated DAC for video CD (CD7 II)(應(yīng)用于視頻CD的帶綜合數(shù)模轉(zhuǎn)換器（DAC）的數(shù)字伺服處理器和光盤譯碼器)
SAA7335GP DSP for CD and DVD-ROM systems
SAA7335 DSP for CD and DVD-ROM systems(在CD和DVD-ROM應(yīng)用中的DSP)
SAA7341 COMS Digital decoding IC for Compact Disc
SAA7341GP COMS Digital decoding IC for Compact Disc
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SAA7327 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital servo processor and Compact Disc decoder with integrated DAC for video CD CD7 II
SAA7327H 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital servo processor and Compact Disc decoder with integrated DAC for video CD CD7 II
SAA7327H/T/M2B,557 功能描述:視頻 IC COMPACT DISC SYSTEMS RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
SAA7327HBG 功能描述:視頻 IC COMPACT DISC SYSTEMS RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
SAA7335 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:DSP for CD and DVD-ROM systems
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