{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9590570","patent":{"patent_number":"US-9590570","title":"Impedance converter circuit for condenser microphone","assignee":null,"inventors":[],"filing_date":"2015-11-19T00:00:00.000Z","publication_date":"2017-03-07T00:00:00.000Z","cpc_codes":["H04R","H04R"],"num_claims":5,"abstract":"To provide an impedance converter circuit for a condenser microphone which can secure a wide dynamic range using a voltage amplifier circuit. The impedance converter circuit is provided with: a first electron tube of a cathode grounded type in which an output signal of a condenser microphone unit is input into a grid and output from a plate; a second electron tube in which an output signal from the plate of the first electron tube is input into a grid and output from at least a cathode; and a feedback element configured to transmit a feedback signal from the cathode of the second electron tube to the grid of the first electron tube."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Impedance converter circuit for condenser microphone","description":"To provide an impedance converter circuit for a condenser microphone which can secure a wide dynamic range using a voltage amplifier circuit. The impedance converter circuit is provided with: a first ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9590570","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-9590570","citation_suggestion":"Patentable. \"Impedance converter circuit for condenser microphone\" (US-9590570). https://patentable.app/patents/US-9590570","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9590570","json":"https://patentable.app/api/llm-context/US-9590570","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T11:41:25.781Z"}