Circuit for controlling the rotation of a rotating member

Details Circuit for controlling the rotation of a rotating member Circuit for controlling the rotation of a rotating member

1994-12-08

1997-12-09

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Synchronizing moving-head moving-record recorders

360 7314, 388811, 388812, 388912, 318603, 318606, G11B 2104, G11B 552, H02P 517, G05B 1929

Patent

active

056966423

ABSTRACT:
A circuit for controlling a rotating member is provided with an input capture register which reads out the value of a free running counter at a timing of an FG (frequency generated) pulse generated in accordance with a rotation of a rotating member. A central processing unit performs an interrupt operation based on a PG (phase generated) pulse generated in accordance with a rotation of the rotating member and an interrupt operation based on the FG pulse. A pulse width modulation circuit rotates the rotating member by use of a speed error signal and a phase error signal which are obtained by the interrupt operations of the central processing unit. A rotating member driver is also provided. The central processing unit calculates the phase error signal from an output of the input capture register based on an FG pulse generated after the generation of the PG pulse.

REFERENCES:
patent: 4885793 (1989-12-01), Tabuchi
patent: 5335189 (1994-08-01), Takayama et al.
patent: 5420960 (1995-05-01), Tabuchi

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