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Transducer for embedded bio-sensor using body energy as a power source

  • US 20050261563A1
  • Filed: 05/20/2004
  • Published: 11/24/2005
  • Est. Priority Date: 05/20/2004
  • Status: Active Grant
First Claim
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1. A bio-sensor system powered by an electro-active polymer (EAP) generator and being adapted to provide a substantially stable voltage to a sensor assembly that is implantable in a patient such that physiological parameters thereof may be accurately measured, the bio-sensor system comprising:

  • a remote transponder configured to transmit a scanner signal to the sensor and to receive a data signal therefrom;

    an implantable on-chip transponder in wireless communication with the remote transponder and being configured to receive the scanner signal and transmit the data signal, the on-chip transponder including;

    a sensor being configured to generate a sensor signal representative of the physiological parameter of the patient;

    a power supply having the EAP generator embedded in muscle tissue of the patient and being configured to generate a power signal for powering the on-chip transponder;

    an analog-to-digital (A/D) assembly connected to the power supply and the sensor, the A/D assembly being configured to respectively receive the power signal and the sensor signal and generate a digital signal in response thereto;

    a data processor connected to the A/D assembly and the power supply, the data processor being configured to respectively receive the power signal and the digital signal and generate a data signal in response thereto; and

    an RF transmitter connected to the power supply and the data processor and being configured to respectively receive the power signal and the data signal and to modulate, amplify, filter and transmit the data signal;

    wherein the power supply is configured to supply a substantially non-deviating sensor reference voltage to the sensor for accurate measurement of the physiological parameter, the remote transponder being configured to receive the data signal from the RF transmitter and to extract data representative of the physiological parameter.

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