{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9621111","patent":{"patent_number":"US-9621111","title":"Apparatus and methods for envelope shaping in power amplifier systems","assignee":null,"inventors":[],"filing_date":"2016-03-24T00:00:00.000Z","publication_date":"2017-04-11T00:00:00.000Z","cpc_codes":["H04B","H04B","H04B","H04B"],"num_claims":20,"abstract":"Apparatus and methods for envelope shaping in power amplifier systems are provided. In certain implementations, a power amplifier system includes a modulator for generating a RF signal, a power amplifier for amplifying the RF signal, a gain control circuit for controlling the gain of the power amplifier, and an envelope tracking system for controlling a voltage level of the power amplifier's supply voltage based on an envelope signal corresponding to the RF signal's envelope. The gain control circuit includes a gain adjustment table, and the envelope tracking system includes an envelope shaping circuit including an isodistortion table. The isodistortion table can be used to map the envelope signal to a shaped envelope signal so as to maintain a substantially constant distortion in the system's transmit and/or receive bands across the envelope signal's range."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Apparatus and methods for envelope shaping in power amplifier systems","description":"Apparatus and methods for envelope shaping in power amplifier systems are provided. In certain implementations, a power amplifier system includes a modulator for generating a RF signal, a power amplif","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9621111","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-9621111","citation_suggestion":"Patentable. \"Apparatus and methods for envelope shaping in power amplifier systems\" (US-9621111). https://patentable.app/patents/US-9621111","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9621111","json":"https://patentable.app/api/llm-context/US-9621111","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T12:20:45.691Z"}