If a plurality of overlapping requests are organized, Timer Service just is in command of each request, and produces info within the appropriate time. When Drive Task received an information of require carrying out to write down, whether this data can point out knowledge and can be cached. ” Write Request, With Caching ” data represents that Drive Task might perform high-speed cache based on the present content material of the Immediate Flag among the many CDB and Write Cache to knowledge. ” Write Request, without caching ” information represents that Drive Task beneath any circumstance can not carry out high-speed cache to data. Drive Task can obtain other information within the process of carrying out non-cache learn, learn expansion thereby ignore initial high-speed cache and don’t make. If receive ” Stop Re-ad Cache ” information, Drive Task only can fulfill the non-cache a half of reading.
In addition, this processing also could be calibrated Writing energy based on temperature, as described above. Order SEEK_COMP_ON and SEEK_COMP_OFF activate respectively and cancel one to sure is a bit optimized and appears into the algorithm of time on the medium. This order can directly produce this algorithm, mark could be set show another module to supply this algorithm, can also produce the interruption of one other module of commander to produce this algorithm. In addition, these expert in the artwork should know different execution course of. After subtracting one another, the output sum-product intergrator of the bandpass filtering level of Figure seventy nine A and the output of low move filtered wave scale is low pass filtering a grade filtering. The sum frequency that includes the local integration phases of low pass filter responds curve shown in Figure 80 D.
Table 37 Anomaly supply Signal Read-out energy Rotation Focus on Follow the tracks of Look for Withdraw from Laser feedback, dieletric reflection and drive error. Shake, vibration, medium is unbalance, and warmth is closed and drive error. Shake, vibration, media injury, medium adjustments, and warmth is closed and drive error. 4) ” Laser Write Power Error (laser-light write energy is wrong) ” is preserved for not having to hold out or carrying out throughout writing to observe laser Writing energy stage. 1) driver Attention signal handler should detect the dish box and insert and arrive the middle.
Position sensitive detectors can go well with to replenish as sensor 2-90, and the situation of sensor in order that when lens frame 2-14 in base 2-80 between two events through the heart, the sunshine of being launched by LED 2-92 might be by line of rabbet joint 2-50, and shall be distributed on the detector. Thus, when lens body 2-14 is monitoring direction when moving with facet to aspect direction, the each several part of sensor 2-90 might be illuminated, with the position of indication lens body 2-14 on monitoring course. Then, when lens body 2-14 was positioned in the middle with respect to base 2-80, the a part mathematical law predicts in around of the light of being launched by LED2-92 might be subject to stopping of lens frame 2-14, causes light to be distributed in asymmetrically on the sensor 2-90. Then, with this mal-distribution by recognized circuits and strategies analyst actually fix-focus lens frame 2-14 with respect to the position of base 2-80. 1,2,4A and 5 figure 5 illustrates the system block diagram of the electronics subsystem of CD-ROM drive 10, and whereby sq. frame 80 includes pickup preamplifier 82, Laser Driven gadget 84 and servo leading sensor amplifier 86. 4 A and 5, pickup preamplifier eighty two is related in Data Detection sensor sixty two, and amplifies the signal that’s produced by data detector sixty two.
With reference to above clarification along side Figure forty three and Figure forty four, thick tracking coil and have equal size and take the optical axis O of object lens as symmetrical. In addition, monitoring coil is to 4-232, and and 4-236,4-238 have equal measurement take the optical axis O of lens as symmetrical. With reference to Figure 28,29,30 and 31, in operation, the sunshine supply component sometimes is the laser diode, Emission Lasers mild beam 2-70, Figure 31. Light beam 2-70 incides on the prism 2-72, and it upwards reflexes to gentle beam on the item lens 2-12 orthogonally. Lens 2-12 is converged to accurate focus or a luminous point 2-74 with gentle beam 2-70 on record medium surface, and the report medium is similar to CD 2-76.
Equally, servo leading sensor amplifier 86 is connected in servo-detector fifty six and 58, and amplifies the sign that’s produced by servo-detector fifty six and 58. Laser diode 42 is connected in Laser Driven gadget 84, and it offers the sign of drive laser forty two. The subsystem 82,84 and 86 of square body Figure 80 is gathered on the optics assembly circuit board 27 together, and it’s positioned near on the position of optics assembly 24.
