{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9818439","patent":{"patent_number":"US-9818439","title":"Determining gamma of a read/write head based on active gain control and test signal amplitude measurements","assignee":null,"inventors":[],"filing_date":"2016-03-18T00:00:00.000Z","publication_date":"2017-11-14T00:00:00.000Z","cpc_codes":["G11B","G11B","G11B","G11B","G11B","G11B","G11B","G11B","G11B","G11B"],"num_claims":20,"abstract":"A change in servo active gain control values is determined from a beginning of a writing of a test region of a recording medium to an end of the writing of the test region. The servo active gain control values are read from servo marks by a read transducer of a read/write head during the writing. After writing of the test region, the test region is read by the read transducer to determine a change in recorded amplitude from the beginning of the writing to the end of the writing. A gamma value of the read/write head is determined based on the change in servo active gain control values and the change in recorded amplitude."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Determining gamma of a read/write head based on active gain control and test signal amplitude measurements","description":"A change in servo active gain control values is determined from a beginning of a writing of a test region of a recording medium to an end of the writing of the test region. The servo active gain contr","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9818439","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-9818439","citation_suggestion":"Patentable. \"Determining gamma of a read/write head based on active gain control and test signal amplitude measurements\" (US-9818439). https://patentable.app/patents/US-9818439","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9818439","json":"https://patentable.app/api/llm-context/US-9818439","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T05:38:52.933Z"}