Low noise magneto-resistive read head preamplifier
US6396346B1 · kind B1 · utility
6Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2000 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Mar 24, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45506
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magneto-resistive head preamplifier structure has a difference amplifier with cross-coupled transistors configured to cancel the adverse effects on preamplified output signals due to parasitic capacitance associated with the difference amplifier transistors. The cross-coupled transistors extend the useable bandwidth of the preamplifier by substantially reducing internally generated thermal noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.