Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Reexamination Certificate
2006-10-24
2006-10-24
Benson, Walter (Department: 2858)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
C324S661000, C324S686000
Reexamination Certificate
active
07126349
ABSTRACT:
Aspects of the invention can provide a fingerprint sensor with high sensing precision. The fingerprint sensor according to the invention can include capacitance detection circuits that output detection signals, which each correspond to a capacitance formed between a subject surface and the fingerprint sensor, to signal transmitting paths, and an amplification circuit that amplifies the detection signals outputted to the signal transmitting paths. The individual signal transmitting paths can be respectively connected to at least two capacitance detection circuits and the fingerprint sensor further includes a resetting means that resets the potential of the signal transmitting paths before the detection signals are outputted from the capacitance detection circuits to the signal transmitting paths.
REFERENCES:
patent: 6028773 (2000-02-01), Hundt
patent: 6448790 (2002-09-01), Imai
patent: 6661019 (2003-12-01), Furusato et al.
patent: 6674668 (2004-01-01), Ikehashi et al.
patent: 6731120 (2004-05-01), Tartagni
patent: 6927581 (2005-08-01), Gozzini
patent: A 11-118415 (1999-04-01), None
patent: A 2000-346608 (2000-12-01), None
patent: A 2001-056204 (2001-02-01), None
patent: A 2001-133213 (2001-05-01), None
patent: A 2003-254706 (2003-09-01), None
U.S. Appl. No. 10/808,523, filed Mar. 25, 2004, Hara.
Benson Walter
Seiko Epson Corporation
LandOfFree
Capacitance detection apparatus, driving method for the... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Capacitance detection apparatus, driving method for the..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Capacitance detection apparatus, driving method for the... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3685087