| US 7,540,947 B2 | ||
| Biosensor, biosensor chip, and biosensor device | ||
| Hiroya Ueno, Takatsuki (Japan); and Junji Nakatsuka, Hirakata (Japan) | ||
| Assigned to Panasonic Corporation, Osaka (Japan) | ||
| Appl. No. 10/488,325 PCT Filed Jun. 16, 2003, PCT No. PCT/JP03/07593 § 371(c)(1), (2), (4) Date Mar. 02, 2004, PCT Pub. No. WO2004/005908, PCT Pub. Date Jan. 15, 2004. |
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| Claims priority of application No. 2002-193547 (JP), filed on Jul. 02, 2002; and application No. 2002-304858 (JP), filed on Oct. 18, 2002. | ||
| Prior Publication US 2004/0251131 A1, Dec. 16, 2004 | ||
| Int. Cl. G01N 27/327 (2006.01) | ||
| U.S. Cl. 204—403.01 [204/403.02] | 49 Claims |
| 1. A biosensor device, comprising:
a biosensor including:
a working electrode to be in contact with an assayed fluid during an assay;
a counter electrode to be in contact with the assayed fluid during an assay, the counter electrode opposing the working electrode
with an interval therebetween for allowing a flow of the assayed fluid;
a working electrode terminal connected to the working electrode;
a counter electrode terminal connected to the counter electrode; and
a working electrode reference terminal connected to the working electrode; and
a measurement circuit connected to the biosensor,
wherein the measurement circuit generates first and second base voltages, applies voltage to the working electrode terminal
so that a voltage at the working electrode reference terminal equals the first base voltage, applies the second base voltage
to the counter electrode terminal, and detects a current according to a current flowing between the working electrode and
the counter electrode.
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