RPI ID: 2005-002-401

Innovation Summary:
This invention introduces a high-precision, digitally controlled voltage source specifically designed for electrical impedance tomography (EIT) systems. The system generates sinusoidal voltage signals with exceptional accuracy and stability across a wide frequency range, enabling precise current injection into biological tissues or other conductive media. The design incorporates a direct digital synthesis (DDS) architecture with a digital-to-analog converter (DAC), followed by a high-linearity analog output stage. This configuration ensures low distortion and high signal fidelity, which are critical for accurate impedance measurements and image reconstruction in EIT.

Challenges / Opportunities:
EIT systems require highly stable and precise voltage sources to ensure accurate impedance measurements, especially in biomedical applications where signal integrity is paramount. Traditional analog signal generators often suffer from drift, noise, and limited frequency control. This invention addresses these limitations by offering a digitally tunable, low-noise voltage source that enhances the performance and reliability of EIT systems. It opens opportunities in non-invasive medical imaging, industrial process monitoring, and geophysical exploration.

Key Benefits / Advantages:
✔ High-precision sinusoidal voltage generation with low harmonic distortion
✔ Digitally tunable frequency and amplitude for flexible operation
✔ Enhanced signal stability and repeatability for improved EIT image quality
✔ Compact and integrable design suitable for portable and embedded systems

Applications:
• Biomedical imaging and functional monitoring (e.g., lung, brain, breast)
• Industrial process control and material characterization
• Geophysical and subsurface imaging
• Research and development in bioimpedance and tomography

Keywords:
#electricalimpedancetomography #precisionvoltagesource #digitalsignalgeneration #biomedicalimaging #noninvasiveimaging

Intellectual Property:
US Issued Patent 7,701,227