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To implement CD-ROM Focus/Tracking Control Loop w/o DSP

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jefftjy

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Have anyone managed to implement a Focus/Tracking Control Loop for CD-ROM without using DSP? I am interested to see if it is possible to implement it using only analog devices and basic components.
 

Nigel Goodwin

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jefftjy said:
Have anyone managed to implement a Focus/Tracking Control Loop for CD-ROM without using DSP? I am interested to see if it is possible to implement it using only analog devices and basic components.

A DSP is only used to replace a great deal of other circuitry, so it would certainly be possible - but I doubt it would be cost effective. If you look for circuits for the very first CD Players (Sony CDP101 was one of the first - 1982), they used much less integration than modern ones.
 
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