An Exponential Current Generation Circuit Using the Taylor Series Approximation for Neural Stimulators

An exponential current generation circuit for neural stimulators is presented. Compared to the conventional exponential current generation circuits, the proposed circuit features higher bandwidth and a smaller error of 2.34%. The output of the proposed exponential current generation circuit ranges from 1.16 to 75.36 $\mu A$. This circuit is designed in a 180-nm CMOS technology under 1.8-V supply voltage.

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