Oscillating erase current circuit
US5386326A · kind A · utility
4Cited by
15References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 25, 1993 |
| Grant date | Jan 31, 1995 |
| Priority date | — |
| Expiry date | Feb 25, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/024
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An oscillating erase current circuit for erasing information recorded on magnetic media. The inductance of an erase head is coupled with capacitors to form a tank circuit having a natural resonant frequency. The self-oscillating erase current circuit generates an oscillating signal having a frequency of oscillation determined by and therefore equal to the natural resonant frequency of the tank circuit. Once enabled, the self-oscillating erase current circuit continuously oscillates without any external drive circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.