{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8497462","patent":{"patent_number":"US-8497462","title":"Trans-impedance amplifier with variable bandwidth and digital coherent optical receiver installing the same","assignee":null,"inventors":[],"filing_date":"2011-05-19T00:00:00.000Z","publication_date":"2013-07-30T00:00:00.000Z","cpc_codes":["H04B","H04B"],"num_claims":9,"abstract":"A trans-impedance amplifier (TIA) with an adjustable bandwidth is disclosed. The TIA of the present invention includes the amplifying stage and the emitter follower stage arranged in the downstream of the amplifying stage. The transistor in the amplifying stage includes a diode in the emitter thereof to provide a substantial emitter level to the transistor. This diode is biased by another current source with a variable function. The operating point of the diode, in particular, the differential resistance thereof, is variable by the current source, which adjusts the bandwidth of the TIA without affecting the phase characteristic of the TIA."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Trans-impedance amplifier with variable bandwidth and digital coherent optical receiver installing the same","description":"A trans-impedance amplifier (TIA) with an adjustable bandwidth is disclosed. The TIA of the present invention includes the amplifying stage and the emitter follower stage arranged in the downstream of","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8497462","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-8497462","citation_suggestion":"Patentable. \"Trans-impedance amplifier with variable bandwidth and digital coherent optical receiver installing the same\" (US-8497462). https://patentable.app/patents/US-8497462","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8497462","json":"https://patentable.app/api/llm-context/US-8497462","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T15:07:02.294Z"}