MUMBAI, India, Sept. 7 -- Intellectual Property India has published a patent application (202641064158 A) filed by Srm Institute Of Science And Technology Tiruchirappalli on May 21, 2026, for Adaptive Low-Noise Differential Amplifier For Biomedical Signal Acquisition.
Inventors include Sivakumaran B S; Baranee Chandaran J; and Dr. K Vaishnavi.
The application for the patent was published on September 04, 2026, under issue no. 36/2026.
Abstract: This invention pertains to an adaptive low-noise differential amplifier system with a focus on biomedical signal acquisition. In existing amplifiers, the change in electrode-skin impedance caused by sweat, motion, and improper contact results in a distorted signal and a loss of diagnostic accuracy. The system proposed here addresses these issues by incorporating real-time impedance measurement and dynamic bias adjustment to maintain signal integrity in varying real-world conditions. The system design includes an electrode interface that injects a probe signal to measure impedance, a differential amplifier with high input impedance and adjustable gain, and an adaptive control loop that adjusts bias currents and input stage configuration in response to impedance measurements. This ensures balanced inputs despite impedance mismatch, thus maintaining a high common-mode rejection ratio and preventing distortion. Biomedical signal conditioning filters also remove noise by isolating biomedical frequencies and eliminating mains noise. The novelty of the invention is in its dual application: the amplification of weak physiological signals such as ECG, EEG, and EMG, and the adaptation to impedance changes simultaneously. This is crucial for the success of wearable health technology, hospital monitoring systems, telemedicine solutions, emergency response systems, sports science, and implantable medical electronics. The invention is a transformative solution that combines technical excellence with social relevance and economic feasibility, addressing the need for dynamic biomedical monitoring, which is currently not met by static amplifiers.
Disclaimer: Curated by HT Syndication.
