Enhanced Active Electrode with Adaptive Noise Reduction

An improved active electrode system for sensing electric potential differences, featuring adaptive noise reduction techniques to enhance signal quality and minimize noise interference.

The original patent disclosed an active electrode with a closed-loop unit-gain amplifier and chopper modulation. However, it had limitations in terms of noise susceptibility, particularly flicker noise and thermal noise. The new inventive concept addresses these limitations by introducing adaptive noise reduction techniques, such as dynamic modulation frequency adjustment, low-noise material coatings, and optimized duty cycles.

The enhanced active electrode system comprises an active electrode component with a closed-loop unit-gain amplifier and chopper modulation. The amplifier is configured to operate at a higher gain during periods of high noise to improve signal quality. Additionally, the input signal is modulated with a modulation signal having a duty cycle of less than 50% to reduce flicker noise. The electrode is coated with a low-noise material to minimize thermal noise. The system also features a reference electrode providing an electric potential reference, and the shield is actively driven to minimize capacitive coupled noise. Furthermore, the amplifier dynamically adjusts the modulation frequency based on the detected noise level, ensuring optimal noise reduction.

The new claims introduce novel and non-obvious features, including adaptive noise reduction techniques, low-noise material coatings, and optimized duty cycles. These innovations provide a significant improvement over the original patent, enhancing signal quality and minimizing noise interference.

Alternative embodiments of the inventive concept may include using different low-noise materials, varying the duty cycle of the modulation signal, or implementing additional noise reduction techniques, such as filtering or shielding. These variations can be applied to different applications, such as biomedical sensing, industrial monitoring, or consumer electronics.

The enhanced active electrode system has significant commercial potential in various industries, including biomedical sensing, industrial monitoring, and consumer electronics. The improved signal quality and noise reduction capabilities make it an attractive solution for applications requiring high-accuracy sensing, such as medical devices, industrial automation, and IoT devices.