Design Optimization of Transistors Used for Neural Recording

Figure 9

Gain verification. Output is measured from a 10 μV input source as approximately 11, missing the design estimate of 12.5 by about 15%. The green arrow shows the 350 Hz −3 dB frequency. The upper 3 dB (not shown) is much greater than the signal range of interest (approximately 10 kHz). The curves show performance of variable 𝑉_𝑡 in this configuration. Notice the gain has been stabilized to less than 3 dB across a threshold variation of 1volt.