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- W1973279852 abstract "High-throughput electrode arrays are required for advancing devices for testing the effect of drugs on cellular function. In this paper, we present design criteria for a potentiostat circuit that is capable of measuring transient amperometric oxidation currents at the surface of an electrode with submillisecond time resolution and picoampere current resolution. The potentiostat is a regulated cascode stage in which a high-gain amplifier maintains the electrode voltage through a negative feedback loop. The potentiostat uses a new shared amplifier structure in which all of the amplifiers in a given row of detectors share a common half circuit permitting us to use fewer transistors per detector. We also present measurements from a test chip that was fabricated in a 0.5-μm, 5-V CMOS process through MOSIS. Each detector occupied a layout area of 35μm × 15μm and contained eight transistors and a 50-fF integrating capacitor. The rms current noise at 2kHz bandwidth is ≈ 110fA. The maximum charge storage capacity at 2kHz is 1.26 × 10(6) electrons." @default.
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- W1973279852 date "2007-04-01" @default.
- W1973279852 modified "2023-10-18" @default.
- W1973279852 title "Design of a CMOS Potentiostat Circuit for Electrochemical Detector Arrays" @default.
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- W1973279852 doi "https://doi.org/10.1109/tcsi.2006.888777" @default.
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