Insole XYZ force detection system

A low power force detection system comprises:

• a plurality of pressure sensor cells arranged in a pattern within a sole of a shoe, wherein a pressure sensor cell of the plurality of pressure sensor cells includes a set of variable capacitors, wherein a variable capacitor of the set of variable capacitors includes:
• two plates;
• one or more conductive layers;
• and
• one or more insulating layers when the variable capacitor includes more than one conductive layer;
• a plurality of drive sense modules operably coupled to the plurality of pressure sensor cells, wherein a drive sense module of the plurality of drive sense modules includes a set of drive sense circuits, wherein a drive sense circuit of the set of drive sense circuits is coupled to a variable capacitor of the set of variable capacitors, and wherein the drive sense circuit is operable to:
• provide an analog and frequency domain signal to the variable capacitor;
• detect a characteristic of the variable capacitor based on the analog and frequency domain signal;
• and
• generate a representative signal of the characteristic;
• and
• a processing module operable to the drive sense module, wherein the processing module is operable to:
• generate a digital value based on the representative;
• and
• write the digital value to memory.