Driver circuit for a contact imaging array
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United States of America Patent
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Jul 7, 1998
Grant Date -
N/A
app pub date -
Mar 4, 1996
filing date -
Mar 4, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A fingerprint sensing device and recognition system includes an array of closely spaced apart sensing elements each comprising a sensing electrode and an amplifier circuit. The device is used to sense electrical charge on a fingertip and obviates the need to pre-charge the sensing electrode. The device may be constructed with a single die or with multiple dies.
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