{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8514676","patent":{"patent_number":"US-8514676","title":"Method and device for sensitivity compensation","assignee":null,"inventors":[],"filing_date":"2012-04-17T00:00:00.000Z","publication_date":"2013-08-20T00:00:00.000Z","cpc_codes":["G11B"],"num_claims":19,"abstract":"Method and device for generating a control voltage for a position actuator of a disk drive system for displacing a lens of a pick-up unit to a given X-position. The actuator is operated by an open loop control system. First, parameters of the control system are calibrated so that the control system produces a control voltage (Va) from an input position signal (Xact_setp). Then, the control voltage is processed in a feed forward system for generating a processed control signal (Va_p) which is fed to the position actuator for displacing said lens to the X-position. A Z-value corresponding to the axial distance of the lens from a calibrated axial position and a temperature of the pick-up unit are measured. The position actuator operates according to the formula:Xdc=Va—p*K(Temp,Z)/(R(Temp)*C(Temp,Z))."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method and device for sensitivity compensation","description":"Method and device for generating a control voltage for a position actuator of a disk drive system for displacing a lens of a pick-up unit to a given X-position. The actuator is operated by an open loo","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8514676","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-8514676","citation_suggestion":"Patentable. \"Method and device for sensitivity compensation\" (US-8514676). https://patentable.app/patents/US-8514676","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8514676","json":"https://patentable.app/api/llm-context/US-8514676","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T14:57:24.570Z"}