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. 2017 Oct 19;17(10):2388. doi: 10.3390/s17102388

Figure 4.

Figure 4

(a) Probe architecture showing the device contains one channel for each electrode; left: the recording and reference electrodes on the probe and their corresponding signal blocks; (b) Channel details showing (symbolically) the electrode connections and reference selection options available on each channel (2 local, external or ground); an averaging line is used to connect any of the 12 local reference together and average the signal across them; the amplification section consists of AC (alternating current) coupled instrumentation amplifier (IA) and programmable gain amplifier (PGA), along with configurable band selection and cutoff corner filter.