Passive Detection of Pulse

摘要: A body-mountable light sensing device includes a photodiode configured to receive from portion of subsurface vasculature and electronics operate the measure received light. The include voltage source reverse bias photodiode, current mirror, sigma-delta modulator generate digital output related having high resolution while using low power. could be used determine pulse rate or other properties blood in by detecting absorption ambient vasculature. Components embedded polymeric material for mounting surface an eye. and/or information wirelessly communicated device.