Device and method for controlling bit density of magnetic card
US8654463B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 20, 2009 |
| Grant date | Feb 18, 2014 |
| Priority date | — |
| Expiry date | Jan 23, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K1/125
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A device and a method for controlling a bit density of a magnetic card (2) are provided. Said control device comprises a stepper motor (1) providing power to drive the magnetic card (2) or a recording magnetic head (15), a transmission mechanism transferring power to the magnetic card (2) or the recording magnetic head (15), a CPU (10) sending magnetic recording information, a track data encoder (13) receiving a magnetic writing pulse signal (CLK1) and generating magnetic writing data in synchronization with the magnetic writing pulse signal (CLK1), and a magnetic head driving circuit (14) outputting a magnetic writing control signal based on the magnetic writing data. The frequency of the magnetic writing pulse signal (CLK1) and the frequency of a driving pulse signal (CLK0) of the stepper motor are in a linear relationship. Said control method is a method for controlling a bit density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.