{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9818004","patent":{"patent_number":"US-9818004","title":"Anti-tamper circuit with internal local oscillator","assignee":null,"inventors":[],"filing_date":"2016-08-31T00:00:00.000Z","publication_date":"2017-11-14T00:00:00.000Z","cpc_codes":["G06K","G06F","G06F"],"num_claims":30,"abstract":"A payment reader includes an anti-tamper circuit for periodically providing control signals to tamper detection devices for detecting tamper attempts. The anti-tamper circuit includes a battery that drives a clock source. The clock source outputs a periodic signal to an enabling circuit and a pulse generator. The pulse generator provides enabling signal to an enabling circuit when it receives the periodic signal, and the enabling circuit provides an oscillator activation signal to a local oscillator when the enabling circuit receives the enabling signal and the periodic signal. The local oscillator provides an oscillating signal to the pulse generator, which utilizes the oscillating signal to exchange control signals with the tamper detection devices."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Anti-tamper circuit with internal local oscillator","description":"A payment reader includes an anti-tamper circuit for periodically providing control signals to tamper detection devices for detecting tamper attempts. The anti-tamper circuit includes a battery that d","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9818004","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-9818004","citation_suggestion":"Patentable. \"Anti-tamper circuit with internal local oscillator\" (US-9818004). https://patentable.app/patents/US-9818004","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9818004","json":"https://patentable.app/api/llm-context/US-9818004","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T13:17:07.739Z"}