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Floppy driving device for pulse modulation

A floppy disk drive, pulse modulation technology, applied in the direction of digital recording, recording/reproducing/deleting methods, etc., can solve problems such as limited density

Inactive Publication Date: 2010-06-23
姜学丰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The only downside to form factor drives and associated media is limited density

Method used

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  • Floppy driving device for pulse modulation
  • Floppy driving device for pulse modulation
  • Floppy driving device for pulse modulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] The switch of the present invention can be used to connect the MFM bus part to the output bus, which in turn is connected to the driver. The output bus can be used to carry MFM data when the drive is operating in low-density or legacy mode. The switch is only closed during this time. Otherwise, the bus will not carry information to the switch. The bus is connected to an output bidirectional bus, which in turn is connected to the driver. The general processing block is installed in the conversion device, which controls the switch, also receives the data input command through the I / O device, and rises to the bus along the bus to transfer the data to the drive, so as to write the SHD formatted data to the drive and slave The drive reads out SHD formatted data. When reading, the SHD data is converted to MIM data and sent to the controller board N, and the processing block for write operations can be used to receive data from the controller board and pass it to the drive ...

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PUM

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Abstract

The invention relates to a floppy driving device for pulse modulation, which belongs to a floppy driver used for a personal computer. The invention provides a high-density data storage system for magnetic mediums. The system comprises a data register used for storing data words to be stored on the magnetic mediums; when the surfaces of the magnetic mediums pass through fixed points, a timing system determines bit units on the surfaces of the magnetic mediums along the surface thereof. In the invention, each bit unit has a determined time period, and all the bit units have the same time period; the timing system can be used for determining a reference pulse for each bit unit; a modulator determines the variable time period from the reference pulse to recording time in each bit unit, and the variable time period is determined by the received time period.

Description

technical field [0001] The present invention pertains to a floppy disk drive for a personal computer. Background of the invention [0002] Mass storage devices for PCs have changed over the years and continue to change. The need for increased drive space to accommodate users' insatiable demand for storage space has progressed through the evolution of storage drives from the original "floppy disk" drives to today's hard disk drives and even optical disk drives. Floppy disk drives include removable media and are relatively inexpensive, while hard disk drives typically include fixed media. However; some hard drives today are removable. Optical drives also have removable media, except that they provide much higher data storage densities. [0003] From a market point of view, these drives are widely accepted among PC users, so the cost of media and drives is greatly reduced. As this technology has evolved, various modulation techniques employed to increase the amount of data ...

Claims

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Application Information

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IPC IPC(8): G11B5/02G11B5/09
Inventor 姜学丰
Owner 姜学丰