Sub-step pulse generating circuit using the period of a step pul

Details Sub-step pulse generating circuit using the period of a step pul Sub-step pulse generating circuit using the period of a step pul

1992-11-17

1995-04-18

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Frequency or repetition rate conversion or control

327 37, 327176, H03K 522, H03K 504, H03K 700

Patent

active

054081343

ABSTRACT:
A circuit for generating a sub-step pulse control signal using a step pulse in a step pulse generating circuit of a floppy disk driver included in a system such a personal computer. The sub-step pulse control signal generating circuit receives a step pulse and a step pulse enable signal and checks the period of the step pulse. When the period of the step pulse is shorter than a set time of a timer, the sub-step pulse control signal generating circuit produces a sub-step pulse having a fast generating time, and when the period of the step pulse is longer than the set time, a sub-step pulse having a slow generating time is produced. Thus, the generating time of the sub-step pulse is automatically adjusted.

REFERENCES:
patent: 3828258 (1974-08-01), Hills et al.
patent: 3958182 (1976-05-01), Sauthier
patent: 4214270 (1980-07-01), Morito
patent: 4233525 (1980-11-01), Takahashi et al.
patent: 4629915 (1986-12-01), Suzuki et al.
patent: 4728816 (1988-03-01), Wike
patent: 4881040 (1989-11-01), Vaughn
patent: 5008571 (1991-04-01), Rudish
patent: 5086237 (1992-02-01), Matsumoto

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