Analog front-end circuitry for biphasic stimulus signal delivery finding use in neural stimulation

Analog front-end circuitry comprising:

• a first current driver circuit comprising a first switched-capacitor power supply configured to produce a first high voltage;
• a second current driver circuit comprising a second switched-capacitor power supply configured to produce a second high voltage;
• and
• a first switch between the first current driver circuit and a first node;
• a second switch between the second current driver circuit and a second node;
• a first high voltage adapter circuit coupled to the first node;
• a second high voltage adapter circuit coupled to the second node;
• a current digital-to-analog converter (DAC);
• a third switch between the first high voltage adapter circuit and the current digital-to-analog converter;
• a fourth switch between the second high voltage adapter circuit and the current digital-to-analog converter;
• a fifth switch between the first high voltage adapter circuit and a reference voltage;
• a sixth switch between the second high voltage adapter circuit and the reference voltage;
• wherein the first current driver circuit and the second current driver circuit are configured to control at least some of the first, second, third, fourth, fifth, and sixth switches to provide a biphasic voltage signal between the first and second node.