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This paper reports an integrated CMOS potentiostat for detection of heavy metal ions in water and other solvents based on electrochemical sensing. The proposed potentiostat features a low-input impedance, high sensitivity, high gain and low power transimpedance amplifier front end, with programmable control of electrode potential, thus facilitating continuous bidirectional measurement of reduction-oxidation...
This paper focuses on tetrapolar coplanar-electrode affinity-based sensors. In a tetrapolar electrode systems there are different ways with which signals can be injected and measured. These injection and measurement methods, namely the Wenner, Dipole-Dipole and Cross techniques, are investigated in this paper by analyzing their sensitivity distribution. This is conducted with the use of FEM modeling...
In the paper we describe a method to extract the topography of an impressed current for our bounded electrical impedance tomography (bEIT) studies. The frequency of the impressed current is low (up to a few hundred Hz), and is buried in background EEG and other noise. For the development of the extraction method, special consideration is given to maximize the signal-to-noise ratio. The standard lock-in...
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