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In this paper, a 16-channel analog front-end (AFE) ECoG-signal acquisition circuit for closed-loop seizure control system is presented. It is composed of 16 auto-reset chopper-stabilized capacitive-coupled instrumentation amplifiers (AR-CSCCIA) with band-pass filters, 16 programmable transconductance-gain amplifiers, a multiplexer, a transimpedance amplifier, and a 10-bit SAR ADC. The low input-referred...
An architecture of SAR ADC called the delta-modulated SAR ADC (DMSAR ADC) is proposed and designed for medical device applications. In the proposed DMSAR ADC, only the voltage difference between two successive samples is resolved to reduce the conversion steps and decrease the power consumption per channel up to 66%. The experimental chip is implemented in 0.18μm CMOS technology. At the digital supply...
An improved bipolar junction transistor (BJT) based silicon retina with simple and compact structure is proposed and analyzed. In the proposed structure, the BJT smoothing network, which models the layer of horizontal cells in the vertebrate retina, is implemented by placing enhancement n-channel MOSFETs among the bases of parasitic BJTs existing in a CMOS process to form an unique and compact structure...
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