Breath analysis DC offset current FPGA History of engineering & technology Internet-of-Things (IoT) IoT PI control RSA TRNG analog front-end (AFE) antennas bio-signal bioelectric acquisition biphasic signal blind people centroid estimation data encryption doppler spectrum doppler velocimetry driven-right-leg dual motor-tendon actuator elbow soft exoskeleton electrocardiogram electrode array electrode stimulation electromagnetic electronic nose (E-nose) electronic travel aids electrooculogram (EOG) electrooculography