Circuit and method for protecting emergency head-retract capacitor in a hard disk drive
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United States of America Patent
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Oct 14, 2008
Grant Date -
N/A
app pub date -
Jul 12, 2006
filing date -
Apr 5, 2004
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A protection circuit for a capacitor comprises a voltage pump that selectively charges the capacitor. A current source selectively charges the capacitor. A controller compares a charging voltage to a threshold charging voltage and selects at least one of the voltage pump and the current source based on the comparison.
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