This paper describes a technique to detect blood cell levels based on the time-period modulation of a relaxation oscillator loaded with an Inter Digitated Capacitor (IDC). A digital readout circuit has been proposed to measure the time-period difference between the two oscillators loaded with samples of healthy and (potentially) unhealthy blood. A prototype circuit was designed in 65nm CMOS technology and post-layout simulations shows 15.25aF sensitivity. The total circuit occupies 2184µm2 silicon area and consumes 216µA from a 1V power supply.
Nagulapalli, RajasekharHayatleh, KhaledBarker, Steve
Tammam, AbdallahLidgey, Francis J.Yassine, Nabil
Faculty of Technology, Design and Environment\School of Engineering, Computing and Mathematics
Year of publication: 2019Date of RADAR deposit: 2019-05-07