{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8489056","patent":{"patent_number":"US-8489056","title":"Frequency agile filter using a digital filter and bandstop filtering","assignee":null,"inventors":[],"filing_date":"2009-11-26T00:00:00.000Z","publication_date":"2013-07-16T00:00:00.000Z","cpc_codes":["H04B","H04B","H04B","H04B","H04B","H04L"],"num_claims":23,"abstract":"The present invention is a hybrid RF-digital signal processor-based filter for multiband radio architectures, systems capable of spectrum re-farming and software defined radios It performs low-loss frequency agile multiple notch filtering at RF where a large dynamic range exists at a filter input between signals in a stopband and passband It is a frequency dependent signal attenuation apparatus having two paths connected together by directional couplers The first path comprising a component such as a delay component or duplexer The second path comprising, in series, a down converter, a digital filter, an up converter, and a bandstop filter At the output of a power amplifier, the invention can be used to attenuate spurs, or noise within bands with strict emission constraints At the input of a low noise amplifier, the invention can be used to attenuate blockers and transmitter noise outside of the receiver passband."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Frequency agile filter using a digital filter and bandstop filtering","description":"The present invention is a hybrid RF-digital signal processor-based filter for multiband radio architectures, systems capable of spectrum re-farming and software defined radios It performs low-loss fr","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8489056","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-8489056","citation_suggestion":"Patentable. \"Frequency agile filter using a digital filter and bandstop filtering\" (US-8489056). https://patentable.app/patents/US-8489056","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8489056","json":"https://patentable.app/api/llm-context/US-8489056","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T12:44:44.797Z"}