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. Author manuscript; available in PMC: 2019 Nov 25.
Published in final edited form as: J Neural Eng. 2019 Oct 9;16(6):066003. doi: 10.1088/1741-2552/ab2610

Figure 7.

Figure 7

(a) Output voltage (after removing the gain of 80 dB) recorded from the Chebyshev notch channel when a sinusoidal single tone (25 Hz, amplitude 100 nV peak) was injected to the input of the channel. (b) Output voltage recorded from the Powerlab 26T bioamplifier when a sinusoidal single tone (25 Hz, amplitude 100 nV peak) was injected to the input of the system. (c) Amplitude spectrum calculated when two sinusoidal tones, one low-frequency (=5 Hz) and one higher-frequency (=25 Hz) are sequentially injected to the inputs of the two AFEs. The amplitude spectrums of both systems present two spectral peaks at 5 and 25 Hz, which are characterized by the same amplitude. (d) Output voltage (after removing the gain of 80 dB) recorded from the Chebyshev notch channel when a sinusoidal single tone (25 Hz, amplitude 30 nV peak) was injected to the input of the channel. (e) Output voltage recorded from the Powerlab 26T bioamplifier when a sinusoidal single tone (25 Hz, amplitude 30 nV peak) was injected to the input of the system. (f) Amplitude spectrum calculated when two sinusoidal tones, one low-frequency (=5 Hz) and one higher-frequency (=25 Hz), are sequentially injected to the inputs of the two AFEs. The amplitude spectrums of both systems present two spectral peaks at 5 and 25 Hz, which are characterized by the same amplitude.