{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8508493","patent":{"patent_number":"US-8508493","title":"Reduction of electromagnetic interference in a capacitive touchscreen system","assignee":null,"inventors":[],"filing_date":"2010-06-21T00:00:00.000Z","publication_date":"2013-08-13T00:00:00.000Z","cpc_codes":["G06F","G06F","G06F"],"num_claims":40,"abstract":"Disclosed herein are various embodiments of circuits and methods for reducing electromagnetic interference in mutual capacitance measurement or sensing systems, devices, components and methods such as capacitive touchscreens. Charge integrator circuits and switched capacitance filtering circuits are disclosed that improve the signal-to-noise ratio (or the ratio of a desired sensed mutual capacitance signal to an undesired EMI signal) in a capacitive sensor readout circuit without the need to increase the amplitude of the drive signal. The various embodiments of the charge integrator and switched capacitance filtering circuits described herein permit an improvement in noise immunity without requiring the excessive power levels typically associated with high amplitude drive circuitry, and moreover result in boosting signal-to-noise ratios during early stages of signal processing."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Reduction of electromagnetic interference in a capacitive touchscreen system","description":"Disclosed herein are various embodiments of circuits and methods for reducing electromagnetic interference in mutual capacitance measurement or sensing systems, devices, components and methods such as","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8508493","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-8508493","citation_suggestion":"Patentable. \"Reduction of electromagnetic interference in a capacitive touchscreen system\" (US-8508493). https://patentable.app/patents/US-8508493","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8508493","json":"https://patentable.app/api/llm-context/US-8508493","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T14:31:10.301Z"}