Optical recording/reproducing head access controlling apparatus for an optical type information recording/reproducing apparatus
US5416758A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 1993 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | Apr 22, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/08541
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical head access controlling apparatus comprises a speed detecting circuit detecting a moving speed of an optical spot irradiated onto an optical disk and outputting a speed detecting signal, a CPU controlling all of said optical head access controlling apparatus and outputting a crossing track number N which is set when access to a target track starts and outputting an access direction, a track counter outputting a remained track number from the crossing track number N to a target track, a reference speed producing circuit producing a reference speed of an optical head in accordance with a remained track number from the track counter, a first amplifier of a gain K1 amplifying a moving speed detecting signal of an optical spot from a speed detecting circuit, a speed direction designating circuit designating a speed direction by an access direction signal of an optical disk from the CPU, a second amplifier of a gain K2 amplifying a reference speed signal from a reference speed producing circuit, a reference speed direction designating circuit designating a reference speed direction by an access direction signal from the CPU, a track pitch distinguishing device for distinguishi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.