Disk drive comprising a programmable preamplifier including a multiplexer for selecting between internal digital signals for output to a terminal
US6111717A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1998 |
| Grant date | Aug 29, 2000 |
| Priority date | — |
| Expiry date | Mar 6, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0018
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive comprising a plurality of read/write transducers, a programmable preamplifier, and a controller for furnishing control and data signals to the programmable preamplifier and for receiving data signals therefrom, is disclosed. The programmable preamplifier comprising a write data input circuit for receiving data signals to be supplied to a transducer, a read data output circuit for manifesting data signals supplied to said preamplifier unit by a transducer, and a transducer interface circuit for providing write data signals to a transducer and receiving read data signals from a transducer. The programmable preamplifier further comprises a multiplexer comprising a first multiplexer input connected to receive a first internal digital signal, a second multiplexer input connected to receive a second internal digital signal, a control input connected to receive a control signal for selecting between the first and second internal digital signals, and a multiplexer output for outputting the selected first or second internal digital signal. The multiplexer output is connected to an output terminal of the programmable preamplifier. The programmable preamplifier comprises a serial…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.