Differential slimmer
US5237463A · kind A · utility
2Cited by
1References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1992 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Jun 30, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1258
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circuit for slimming signals read signals from a read/write head of a rotating disk data storage device. A low-pass filter and a high-pass filter are connected in parallel to the read signal from the read/write head. These filters each have a variable gain amplifier connected to their respective output ports. The gain of each of the variable gain amplifiers is programmably adjusted in accordance with preselected criteria. A summing circuit is connected to the outputs of the variable gain amplifiers to generate a slimmed read signal. A multi-pole low pass filter has an input port coupled to the output port of the summing circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.