The pacing pulse produced by implantable stimulators can be described as a truncated exponential decay from the starting peak amplitude. corresponding to the discharge of the output stage capacitance (reservoir and isolation capacitors. in series) along the application time. Pulse decay and charge balancing have relevant implications on the ideal setting of a pacing device. https://www.roamingfreesims.com/product-category/led-pll-direct-to-mains-240v-ac/