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Circuit Architecture and System for Implantable Multi-Function and Multi-Analyte Biosensing Device

  • US 20140072308A1
  • Filed: 09/10/2013
  • Published: 03/13/2014
  • Est. Priority Date: 09/10/2012
  • Status: Active Grant
First Claim
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1. An implantable bio-sensing platform that enables the wireless selection, calibration and reading of multiple sensors, wherein the bio-sensing platform receives optical power and coded optical instructions from an external control unit located in proximity of the implanted sensor platform chip, the bio-sensing platform comprising:

  • sensors,sensor interface circuits,signal processors,electronic multiplexers,solar cells, andoptoelectronic transmitters and receivers that wirelessly communicates with the external control unit, wherein the platform receives from the optical transmitter located in the external control unit coded pulses using at least one photodetector operating at the dedicated wavelength and converting them to electrical pulses, wherein the solar cells are interfaced with at least one voltage regulator circuit whose output provides stable power to the entire platform electronic circuits and optoelectronic transmitters and receivers,wherein the coded electrical pulses are decoded using finite state machine architecture by the mode select unit interfacing with the photodetector receiving the coded pulses,wherein the mode select unit includes logic circuits configurable to perform various functions depending on the coded pulses,wherein the coded pulse sequence in one code enables operation of checking solar power output providing information regarding the level of electrical power generated by the solar cells by sending a dedicated frequency voltage pulse train which drives the optical transmitter with a specific optical wavelength and located on the implanted platform,wherein the coded pulse sequence in one embodiment enables checking of operation of a potentiostat interfacing with a bio-sensing element before bio-sensing element code is sent for taking readings, wherein the output of the optical transmitter is received by a dedicated second photodetector in the external control unit, and wherein the second photodetector located in the external control unit output is processed and displayed,wherein the coded pulse sequence in another coded sequence enables calibration and reading of a designated biosensor, wherein the bio-sensing platform includes analyte sensors, protein sensors, and physiological sensors, the analyte sensors being connected to interface electronics, signal processing unit, and multiplexer, the multiplexer output feeds a driver that in turn feeds the said optical transmitter which converts electrical pulses into optical pulses.

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