{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9673782","patent":{"patent_number":"US-9673782","title":"Center frequency and Q tuning of biquad filter by amplitude-limited oscillation-based calibration","assignee":null,"inventors":[],"filing_date":"2016-08-16T00:00:00.000Z","publication_date":"2017-06-06T00:00:00.000Z","cpc_codes":["H04B"],"num_claims":21,"abstract":"Certain aspects of the present disclosure provide methods and apparatus for calibrating a tunable active filter. One example apparatus is a filter circuit that generally includes a tunable active filter comprising at least one amplifier and a first feedback path coupled between an input and an output of the at least one amplifier, the first feedback path comprising at least one switch; and an amplitude limiter coupled to the tunable active filter and comprising at least one transistor disposed in a second feedback path coupled between the input and the output of the at least one amplifier."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Center frequency and Q tuning of biquad filter by amplitude-limited oscillation-based calibration","description":"Certain aspects of the present disclosure provide methods and apparatus for calibrating a tunable active filter. One example apparatus is a filter circuit that generally includes a tunable active filt","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9673782","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-9673782","citation_suggestion":"Patentable. \"Center frequency and Q tuning of biquad filter by amplitude-limited oscillation-based calibration\" (US-9673782). https://patentable.app/patents/US-9673782","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9673782","json":"https://patentable.app/api/llm-context/US-9673782","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T15:41:07.401Z"}