Position demodulating method and circuit of disk apparatus

Details Position demodulating method and circuit of disk apparatus Position demodulating method and circuit of disk apparatus

2005-09-13

2005-09-13

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Modulating or demodulating

C360S030000, C360S075000, C360S077010, C360S078010

Reexamination Certificate

active

06943970

ABSTRACT:
Position information PosN and PosQ are compared and position information Pos1and Pos2in which influences of an error of a position sensitivity gain appear oppositely are calculated. Subsequently, a weight gain G1=M and a weight gain G2=(1−M) are obtained from the position information Pos1. A multiplication value obtained by multiplying the third position information Pos1by the weight gain G1and a multiplication value obtained by multiplying the fourth position information Pos2by the weight gain G2are added and synthesized, thereby calculating a decoded position.

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