Pre-amplifier employing transistors having a diminished breakdown voltage and a disk drive and a Thevenin writer employing the same
US7019923B2 · kind B2 · utility
1Cited by
4References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2003 |
| Grant date | Mar 28, 2006 |
| Priority date | — |
| Expiry date | Feb 13, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45085
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A pre-amplifier, a Thevenin writer and a disk drive employing transistors having a breakdown voltage below a circuitry operating voltage. In one embodiment, the pre-amplifier includes an emitter-follower transistor pair couplable to a power supply and a differential transistor pair, having a collector-emitter breakdown voltage below a voltage of the power supply, that receives current from, and controlled by, the emitter-follower transistor pair.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.