{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8515135","patent":{"patent_number":"US-8515135","title":"PLL adjustment to find and maintain resonant frequency of piezo electric finger print sensor","assignee":null,"inventors":[],"filing_date":"2008-05-06T00:00:00.000Z","publication_date":"2013-08-20T00:00:00.000Z","cpc_codes":["A61B","G06V"],"num_claims":27,"abstract":"Provided is a method for determining a resonant frequency of a biometric sensor. The method includes obtaining first pixel data from a first scan by scanning the biometric sensor with a first frequency. Second pixel data is obtained from a second scan by scanning the biometric sensor with a second frequency that is different from the first frequency. A respective first and second reference value is calculated from the first and the second pixel data. A highest reference value is determined from the first and the second reference values. The first or the second frequency is selected as the resonant frequency based on the highest reference value."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"PLL adjustment to find and maintain resonant frequency of piezo electric finger print sensor","description":"Provided is a method for determining a resonant frequency of a biometric sensor. The method includes obtaining first pixel data from a first scan by scanning the biometric sensor with a first frequenc","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8515135","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-8515135","citation_suggestion":"Patentable. \"PLL adjustment to find and maintain resonant frequency of piezo electric finger print sensor\" (US-8515135). https://patentable.app/patents/US-8515135","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8515135","json":"https://patentable.app/api/llm-context/US-8515135","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T15:39:42.127Z"}