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The design of a 1–8 Gb/s optical wireless communication (OWC) dual-mode receiver is presented in this paper. The transimpedance amplifier (TIA) based reconfigurable receiver implements a high-sensitivity (HSS) mode to enable 1Gb/s OWC link over long distance, while a high speed (HSD) mode to enable up to 8Gb/s OWC link over short distance. In the HSS mode, the receiver is designed for high gain and...
Microelectrode array (MEA) can be used in the study of neurodegenerative diseases by monitoring the chemical neurotransmitter release and the electrical potential simultaneously at the cellular level. Currently, the MEA technology is migrating to more electrodes and higher electrode density, which raises power and area constraints on the design of acquisition IC. In this paper, we report the design...
This paper presents the design of a low-power highly sensitive impedance analyzer for electrochemical impedance spectroscopy (EIS) in a 0.18µm CMOS process. The analyzer uses a low-power current buffer with high gain to suppress the noise from the back-end. A heterodyne mixer is designed to reduce the flicker noise of following stages. It also enables the simultaneous recording of the amplitude and...
Physiological study requires simultaneous electrical and chemical recording at the synaptic level with high-density (HD) micro-electrode arrays (MEA). This paper presents a 200-channel IC for HD-MEA dual-mode signal acquisition. With the large amount of channels, both current and voltage channels are designed with minimal power and area while achieving low noise and good linearity. To minimize the...
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