Powering system for constant current neural stimulators

A powering system, providing an adaptive supply voltage for constant current neural stimulators comprising;

• an adaptive voltage supply generator, configured to be connected to an energy source to output desired voltage levels and to decrease an average supply voltage, and wherein the adaptive voltage supply generator is configured to generate a necessary voltage compliance with energy sources having varying voltage levels and provide the necessary voltage compliance to a switch matrix, the switch matrix is configured to create a necessary stimulation signal for a stimulation electrode;
• a monitoring circuit, for measuring an electrode voltage compliance and control the voltage supply generator and the monitoring circuit comprises:
• a voltage subtracting circuit, wherein the voltage subtracting circuit continuously provides an electrode's voltage difference to the voltage supply generator and enable the voltage supply generator to adapt the voltage supply generator to any changes, wherein the any changes occur during a stimulation by tracking an electrode voltage,
• a digitalizing circuit to change a number of charge pump stages operational
• a charge pump, tracking the electrode voltage by a control of the number of the charge pump stages utilized and a control of a frequency;
• a step-down converter, configured to be connected to the energy source to power the monitoring circuit and power a control circuitry to bring down a power loss and wherein the step-down converter is configured to decrease a power dissipation of the control circuitry;
• and
• a rechargeable battery.