{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9778291","patent":{"patent_number":"US-9778291","title":"AC input voltage interruption detection method and circuit","assignee":null,"inventors":[],"filing_date":"2012-09-14T00:00:00.000Z","publication_date":"2017-10-03T00:00:00.000Z","cpc_codes":["H02M"],"num_claims":6,"abstract":"A selector circuit selects either a class upper-limit voltage or a class lower-limit voltage as a reference voltage of a comparator. A control logic controls the selector circuit, and generates a count-up signal or a count-down signal in accordance with the output of the comparator. An up/down counter counts up upon reception of the count-up signal from the control logic, and counts down upon reception of the count-down signal. A digital-analog converter outputs the class upper-limit voltage and the class lower-limit voltage in accordance with a digital value that is outputted by the up/down counter. A timer circuit is configured to be reset by the count-up signal from the control logic to the up/down counter."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"AC input voltage interruption detection method and circuit","description":"A selector circuit selects either a class upper-limit voltage or a class lower-limit voltage as a reference voltage of a comparator. A control logic controls the selector circuit, and generates a coun","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9778291","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-9778291","citation_suggestion":"Patentable. \"AC input voltage interruption detection method and circuit\" (US-9778291). https://patentable.app/patents/US-9778291","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9778291","json":"https://patentable.app/api/llm-context/US-9778291","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T05:38:40.313Z"}