Development of a miniature device for emerging deep brain stimulation paradigms - Fig 1

A. Standard stimulation pulse train with active charge balancing. The amplitude of the stimulation pulse Qs can either be a voltage or current pulse depending on the stimulation method. The variable ts is the duration of the pulse, common values are 60 μs or 90 μs. td is the inter-pulse interval, the amount of time between the stimulation pulse and the charge balanced pulse. Qc is the amplitude of the active charge balanced pulse and tc is the period, this pulse can either be symmetric or asymmetric. Finally, tp is the period between pulses, this parameter is the inverse of the pulse frequency. B. An example of a non-constant pulse train, in this case a delayed feedback scheme. C. Gaussian stimulation waveform. D. Sine-wave stimulation waveform. E. Triangular stimulation waveform.