135026.fig.004a
(a)
135026.fig.004b
(b)
135026.fig.004c
(c)
135026.fig.004d
(d)
135026.fig.004e
(e)
Figure 4: (a) The measured intrinsic input referred noise of the neural amplifier. (b) Circuit simulation and measurement results of the intrinsic input referred spectral noise density of the neural amplifier calculated from the data in (a). (c) Input referred noise of the neural amplifier with the glass micropipette electrode measured in dead gerbil brain tissue with an electrical quiet environment (light off) (d) Circuit simulation and measurement results of the input referred spectral noise density calculated from the data measured in (c). (e) Input referred noise measured in dead gerbil brain tissue in an electrical noisy environment (light on).