A Low-Power Logarithmic CMOS Digital-to-Analog Converter for Neural Signal Recording

Maryam Gharaei Jomehei,Samad Sheikhaei,Ehsan Hadizadeh Hafshejani,Shahriar Mirabbasi

IEEE Transactions on Circuits and Systems II: Express Briefs（2022）

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摘要

Benefitting from the exponential I-V characteristic curve of CMOS transistors operating in the subthreshold regime, we propose a logarithmic digital-to-analog converter (DAC) for neural recording systems. The reported 8-bit logarithmic DAC converts small voltages with lower resolution and as the input signal increases the resolution of the conversion also increases. The step size changes from 65 m...

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关键词

Transistors,Switches,Resistance,Measurement uncertainty,MOSFET,Current mirrors,Threshold voltage

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