US9258035 — Multi-mode communication ingestible event markers and systems, and methods of using the same

USPTO Abstract

A device including an integrated circuit, a partial power source, including first and second materials associated with the integrated circuit is disclosed. The first and second materials are configured to provide a voltage potential difference when in contact with a conductive fluid to power up the device. A signal amplification element secured around the integrated circuit relative to the first and second materials is configured to facilitate extension of a current flow path between the first and second materials. A modulator is configured to control conductance between the first and second materials to generate a detectable signal that is partially defined by the current flow extending through the conductive fluid. A communication module is coupled to the partial power source and is configured to communicate with a receiver and an antenna electrically coupled to the communication module, which uses the antenna to communicate with the receiver.