{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9634558","patent":{"patent_number":"US-9634558","title":"Negative charge pump feedback circuit","assignee":null,"inventors":[],"filing_date":"2014-12-21T00:00:00.000Z","publication_date":"2017-04-25T00:00:00.000Z","cpc_codes":["H02M","H02M"],"num_claims":5,"abstract":"The present invention discloses a negative charge pump feedback circuit, wherein the feedback circuit is connected between an AND gate and the output terminal of the negative charge pump, and a clock signal is connected to the negative charge pump through the AND gate and under the control of the feedback signal, with the feedback circuit including a switch-capacitor circuit and a comparator; a first terminal of a first capacitor of the switch-capacitor circuit is connected to the output terminal of the negative charge pump through a first switch, and grounded through a second switch; a first terminal of a second capacitor is connected to a second terminal of the first capacitor, grounded though a third switch, and connected to the comparator though a fourth switch; an adjustable capacitor is connected in parallel to both terminals of the second capacitor; a positive-phase input terminal of the comparator is connected to a reference voltage. The switch-capacitor circuit is made to switch constantly between two states by the control of four control signals over the four switches, achieving voltage division and positive/negative voltage conversion simultaneously. The present invention can reduce the circuit area, increase the feedback speed, and reduce the output voltage ripple of the charge pump."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Negative charge pump feedback circuit","description":"The present invention discloses a negative charge pump feedback circuit, wherein the feedback circuit is connected between an AND gate and the output terminal of the negative charge pump, and a clock ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9634558","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-9634558","citation_suggestion":"Patentable. \"Negative charge pump feedback circuit\" (US-9634558). https://patentable.app/patents/US-9634558","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9634558","json":"https://patentable.app/api/llm-context/US-9634558","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T09:19:59.758Z"}