Power management system for a capsule endoscope using autofluorescence imaging

Fluorescence endoscopy is one of the most effective methods for early cancer detection in the GI tract. An endoscopy pill that can provide qualitative and quantitative diagnostic information is required to inspect parts of the GI tract inaccessible to conventional endoscopes. A key component of this pill is an integrated high-sensitivity fluorescence imager with a high voltage source for biasing with very low power consumption. In this paper, we present a power management system for a high sensitivity imager to be integrated in a capsule endoscope for autofluorescence imaging.