Research Article

Circuit Models and Experimental Noise Measurements of Micropipette Amplifiers for Extracellular Neural Recordings from Live Animals

Table 1

Comparison of noise levels of theoretical predictions and experimentally measured results. Values in parenthesis indicate the percentage increase in the experimental results over the simulated results.

Theoretical predication
( )
Measurements in a dead gerbil brain
( )
In vivo measurements with an anesthetized gerbil
( )

Intrinsic amplifier noise ( )1.441.81 (26%)1.81 (26%)
Micropipette thermal noise ( )11.15
Overall noise ( )11.2411.90 (6%)15.15 (35%)