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Fig. 7 | Journal of NeuroEngineering and Rehabilitation

Fig. 7

From: Development of a battery-free ultrasonically powered functional electrical stimulator for movement restoration after paralyzing spinal cord injury

Fig. 7

a Comparison of peak output voltage of different conditioning circuits for 1 V (p-p), 1 MHz sinusoidal input signal. b Output pulse generated by the Villard voltage doubler circuit from a 200 μs sinusoidal burst at 1 MHz. The pulse shape is similar to conventional FDA-approved electrical stimulators

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