Giga-ohm high-impedance fet input amplifiers for dry electrode biosensor circuits and systems

Recently with rising health costs and an aging population, there is an increased demand for comfortable monitoring and sensing of biosignals in order to enable and encourage the transition of healthcare services into everyday living including the home, workplace, and during exercise. Sensors can be situated in objects that people interact with daily, such as within a computer, chair, bed, toilet, car, telephone, or any portable personal electronic device.