In this paper, a system-on-a-chip (SoC) designed to interface a piezoresistive sensor for implantable pressure sensing is reported. It is fabricated in 65 nm CMOS and consists of a resistance-to-time ...

Respiration rate calculation is also carried out during coughing and headshaking. In the events of coughing, response of the optical sensor is much more prominent as compared to the electronic sensor.