Noncontact Proximity Vital Sign Sensor Based on PLL for Sensitivity Enhancement - Hong, Yunseog; Kim, Sang-Gyu; Kim, Byung-Hyun; Ha, Sung-Jae; Lee, Hee-Jo; Yun, Gi-Ho; Yook, Jong-Gwan (IEEE transactions on biomedical circuits and systems, 2014)
Keywords: Ambient temperature; Biomedicine; Breath Tests - instrumentation; Equipment Design; feedback circuit; Heart Rate - physiology; Humans; Impedance; input impedance variation; near-field receiving antenna; noncontact; phase locked loop (PLL); Phase locked loops; remote sensing; Resonant frequency; Respiration; Sensitivity; Signal Processing, Computer-Assisted; Temperature sensors; vital sign sensor; Voltage-controlled oscillators