{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8519825","patent":{"patent_number":"US-8519825","title":"RFID transponder","assignee":null,"inventors":[],"filing_date":"2009-05-13T00:00:00.000Z","publication_date":"2013-08-27T00:00:00.000Z","cpc_codes":["G06K","H04L","H04L"],"num_claims":6,"abstract":"An RFID transponder (1) comprises a demodulator (3) for demodulating received phase modulated carrier signals (CSQ), converting them down to a modulated baseband signal (MS) and filtering the converted signal. Sampling means (7) sample the filtered signal (FS) and store an actual sampling value (S(t0)) and a previous sampling value (S(t1)) of the filtered signal (FS). Subtracting means (8) calculate a difference (DS) between the actual sample value (S(t0)) and the previous sample value (S(t1)). Difference evaluation means (9) evaluate the difference (DS) according to the following criteria: a. if the difference is positive and outside of a predefined zero range (ZR) a first logical value is determined; b. if the difference is negative and outside of the zero range a second logical value is determined; c. if the difference is within the zero range the logical value of the latest evaluation is kept."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"RFID transponder","description":"An RFID transponder (1) comprises a demodulator (3) for demodulating received phase modulated carrier signals (CSQ), converting them down to a modulated baseband signal (MS) and filtering the converte","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8519825","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-8519825","citation_suggestion":"Patentable. \"RFID transponder\" (US-8519825). https://patentable.app/patents/US-8519825","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8519825","json":"https://patentable.app/api/llm-context/US-8519825","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T05:11:19.604Z"}