{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9778804","patent":{"patent_number":"US-9778804","title":"Calibrating charge mismatch in a baseline correction circuit","assignee":null,"inventors":[],"filing_date":"2015-06-04T00:00:00.000Z","publication_date":"2017-10-03T00:00:00.000Z","cpc_codes":["G06F","G06F","G06F","G06F","G06F"],"num_claims":19,"abstract":"Various embodiments provide a processing module that calibrates a current-mode baseline correction system to account for features in an input device that lead to “offset” in output of a charge integrator used for sensing presence of an input object. The offset is a difference between a common mode voltage, which is the average voltage output of the charge integrator over a sensing cycle and a mid-rail voltage midway between high and low power supply voltages. Calibration is performed by adjusting an N-side and/or P-side current flow duration parameter until common mode voltage falls within a low offset window in which the offset is deemed to be sufficiently close to the mid-rail voltage. The resulting duration parameters are stored and used for current-mode baseline corrections when operating an associated sensor electrode for capacitive sensing."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Calibrating charge mismatch in a baseline correction circuit","description":"Various embodiments provide a processing module that calibrates a current-mode baseline correction system to account for features in an input device that lead to “offset” in output of a charge integra","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9778804","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-9778804","citation_suggestion":"Patentable. \"Calibrating charge mismatch in a baseline correction circuit\" (US-9778804). https://patentable.app/patents/US-9778804","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9778804","json":"https://patentable.app/api/llm-context/US-9778804","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T03:50:58.884Z"}