On the integration of an internal human conditioning system

Medical equipment is reviewed for its relative importance in sales and for its suitability to be integrated. It is shown how most implantable circuit configurations can be derived from an internal human conditioning system (IHCS), which carries out all elementary functions of measurement and stimulation in the human body. The potential integration of such an IHCS is discussed. For the sake of illustration a number of devices and circuits are presented, such as a low-power VCO, a micropower op amp, a biotelemetry chip, and an ear stimulator decoder chip.