Pre-amplifier employing transistors having a diminished breakdown voltage and a disk drive and a Thevenin writer employing the same
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United States of America Patent
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Mar 28, 2006
Grant Date -
Dec 25, 2003
app pub date -
Apr 22, 2003
filing date -
Apr 22, 2002
priority date (Note) -
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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.
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