Tinkering CD Players & Digital Audio
Smooth Lock-In of Servo Control When Switched On An apparatus for playing optical discs is described, in which for a smoother locking-in of the focus servo control the focussing error signal is initially derived...
Apparatus for enabling an autotrack circuit of an optical disc reading apparatus during the positioning of a read beam Description The invention relates to an apparatus for reading a disc-shaped record carrier in which...
Apparatus For Optically Scanning a Disc Shaper Record Carrier An apparatus for optically reading a disc-shaped record carrier, which apparatus comprises a radial tracking control system which employs a radial error signal obtained by...
The invention relates to a package for at least one disc provided with a central centre hole, the package comprising a plurality of rectangular com ponent parts connected to one another so as to...
In a method of marking optically readable disc-shaped information carriers which are manufactured, for example, by a transfer-moulding process using at least one mould serving as a stamper, which mould has been derived from...
De uitvinding betreft een verpakking voor een optisch uit- leesbare plaat en omvat een, althans ruwweg, vlakke drager die aan én van zijn zijden is voorzien van vasthoudmiddelen voor het makkelijk losneembaar aanbrengen van...
De onderhavige uitvinding heeft betrekking op een doos bestend voor het opnemen van twee compactdiscs en dergelijke. De uitdrukking “compact disc” (cd), welke in de beschrijving wordt gebruikt, verwijst naar opti- sche schijven die...
Optical Focusing Device The invention relates to an optical device comprising an axially movable objective with an optical axis, a frame carrying guide means for the axial movements of the objective, and an electro-magnetic...
Patent : US4731778 – Electro-Magnetic Drive Unit Comprising a Pivotable Armaturen Octrooi : NL8502872A – Electro-magnetische aandrijfeenheid met zwenkbaar anker.
The 1st generation philips CD player where not that fast in track search, they used binary search and where limited by free available memory Why the binary search is limited starting with 256 tracks:...