{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8483646","patent":{"patent_number":"US-8483646","title":"Second order intermodulation canceller","assignee":null,"inventors":[],"filing_date":"2011-12-12T00:00:00.000Z","publication_date":"2013-07-09T00:00:00.000Z","cpc_codes":["H04B"],"num_claims":17,"abstract":"A technique for cancelling out target IM2 components in a wireless receiver's mixer output is disclosed. A differential RF signal and a differential local oscillator (LO) signal are mixed by a mixer to demodulate the RF signal. A first common node signal is generated between a first resistor and a second resistor coupled across the mixer's differential output terminals. A second common node signal is generated between a third resistor and a fourth resistor coupled across the differential output terminals, where a capacitor is coupled between the second common node and a power supply terminal. The second common node signal provides a stable reference signal for IM2 components above a certain frequency. The two common node signals are subtracted to create a difference signal. The difference signal is scaled by a scaling factor obtained during calibration. The scaled difference signal is coupled to the mixer output to offset IM2 distortion."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Second order intermodulation canceller","description":"A technique for cancelling out target IM2 components in a wireless receiver's mixer output is disclosed. A differential RF signal and a differential local oscillator (LO) signal are mixed by a mixer t","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8483646","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-8483646","citation_suggestion":"Patentable. \"Second order intermodulation canceller\" (US-8483646). https://patentable.app/patents/US-8483646","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8483646","json":"https://patentable.app/api/llm-context/US-8483646","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T14:48:46.943Z"}