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- W2029873372 abstract "Gas-sensitive micro-bridge devices, fabricated with four conducting polymer resistive elements, have been characterised using a standard cell Complementary Metal-Oxide Semiconductor (CMOS) current drive chip and precision linear analog interface circuitry. Poly(aniline) (PAN) types of polymers were used to create the four resistive elements, while two, opposite arms of the micro-bridge were passivated by a protective coating of either epoxy resin or nafion. The standard cell analog current drive chip was designed to supply currents in the micro-amp range through an array of six resistive polymer micro-bridge devices. The chip was fabricated using the Alcatel Mietec 2.4 μm CMOS process. It exhibits good d.c. stability, and a linear temperature coefficient of about −1.2×10−3/°C. The chip can be driven in an a.c. as well as in a d.c. mode and gives a stable pulsed current source at frequencies of up to 10 kHz. The output voltages of all of the current-driven micro-bridges were observed to follow the Langmuir adsorption isotherm. The nafion-coated bridges exhibited a substantially reduced sensitivity to ambient humidity and, rather surprisingly, a positive temperature coefficient." @default.
- W2029873372 created "2016-06-24" @default.
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- W2029873372 date "1999-09-01" @default.
- W2029873372 modified "2023-10-13" @default.
- W2029873372 title "Polymeric resistive bridge gas sensor array driven by a standard cell CMOS current drive chip" @default.
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- W2029873372 doi "https://doi.org/10.1016/s0925-4005(99)00130-6" @default.
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