{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9817509","patent":{"patent_number":"US-9817509","title":"Methods and apparatuses for providing sensing signals for projected capacitive touch sensing using a differential current mode analog circuit","assignee":null,"inventors":[],"filing_date":"2015-10-30T00:00:00.000Z","publication_date":"2017-11-14T00:00:00.000Z","cpc_codes":["G06F","G06F","G06F","G06F"],"num_claims":13,"abstract":"An analog front-end circuit comprising: a first current mode differential charge amplifier for a first sensing line, comprising: a unity gain buffer with current replication circuit, wherein the first sensing line current being fed to the unity gain buffer with current replication circuit to generate a pull up and a pull down output currents; and a current mirroring and amplification circuit, wherein the pull up and pull down output currents being fed to the current mirroring and amplification circuit to generate a positively scaled and a negatively scaled output currents; a current combining circuit for combining the positively scaled output generated for the first sensing line and a negatively scaled output current generated for a second sensing line to generate a differential current; and a differential current-to-voltage converter for converting the differential current to an output voltage usable by touch controller application."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Methods and apparatuses for providing sensing signals for projected capacitive touch sensing using a differential current mode analog circuit","description":"An analog front-end circuit comprising: a first current mode differential charge amplifier for a first sensing line, comprising: a unity gain buffer with current replication circuit, wherein the first","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9817509","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-9817509","citation_suggestion":"Patentable. \"Methods and apparatuses for providing sensing signals for projected capacitive touch sensing using a differential current mode analog circuit\" (US-9817509). https://patentable.app/patents/US-9817509","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9817509","json":"https://patentable.app/api/llm-context/US-9817509","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T11:21:45.099Z"}