Preamplifier of a signal from a variable resistance sensor, and a current source
US5444579A · kind A · utility
32Cited by
8References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1993 |
| Grant date | Aug 22, 1995 |
| Priority date | — |
| Expiry date | Dec 17, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0018
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A preamplifier provides an output signal which follows a varying resistance of a sensor of a condition or parameter. An example sensor is a magneto-resistive head employed in computer mass storage systems to read magnetic signals recorded on a magnetic tape or disk. The preamplifier uses a current-mode amplifier to increase its bandwidth and reduce signal distortion. A current source, used with the preamplifier or some other circuit, includes a low pass filter to reduce the effects of various noise sources.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.