{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9716954","patent":{"patent_number":"US-9716954","title":"DC impedance detection circuit and method for speaker","assignee":null,"inventors":[],"filing_date":"2016-01-18T00:00:00.000Z","publication_date":"2017-07-25T00:00:00.000Z","cpc_codes":["H04R"],"num_claims":16,"abstract":"A DC impedance detection circuit can include: an integration time generation circuit configured to generate an integration time signal in accordance with a current flowing through a speaker, where the current of a speaker at a beginning time of each active time interval of the integration time signal is the same as that at an ending time of the active time interval; a current integration circuit configured to integrate the current of the speaker in the active time interval, and to generate a current integration signal; a voltage integration circuit configured to integrate a voltage of the speaker in the active time interval, and to generate a voltage integration signal; and where a ratio between the voltage integration signal and the current integration signal is configured as a DC impedance of the speaker in the active time interval."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"DC impedance detection circuit and method for speaker","description":"A DC impedance detection circuit can include: an integration time generation circuit configured to generate an integration time signal in accordance with a current flowing through a speaker, where the","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9716954","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-9716954","citation_suggestion":"Patentable. \"DC impedance detection circuit and method for speaker\" (US-9716954). https://patentable.app/patents/US-9716954","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9716954","json":"https://patentable.app/api/llm-context/US-9716954","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T08:35:51.960Z"}