Figure 7

Generator signals. Generator signals: a) Waveforms of the sinusoidal signal burst provided at the generator output during the recording window of the implant. The generator output signals were sampled using an analog measuring device (National Instruments PCI-6024E) with a rate of 200 kHz and a resolution of 12 bits. The largest signal amplitude generated was 4 V. b) Corresponding spectra of the generator outputs for different amplitudes with the common main signal frequency of 4.3 kHz.