Current control circuit and method for programmable read write preamplifier
US5790331A · kind A · utility
23Cited by
1References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 11, 1995 |
| Grant date | Aug 4, 1998 |
| Priority date | — |
| Expiry date | Aug 11, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0018
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Write and read bias current control circuits are programmable through a control port. Both the read head bias DAC and the write DAC are controlled through a control port and both DACs use current as an input reference. The write and the read bias currents have constant reference current components which are set externally. The write and the read bias currents additionally have components which are a product of the reference current and a digital word loaded into an associated one of the DACs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.