{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9627602","patent":{"patent_number":"US-9627602","title":"Driving circuit for a piezoelectric actuator","assignee":null,"inventors":[],"filing_date":"2016-06-21T00:00:00.000Z","publication_date":"2017-04-18T00:00:00.000Z","cpc_codes":["G11B"],"num_claims":13,"abstract":"A driving circuit is configured to apply a drive signal to a first terminal of a drive piezoelectric actuator having a second terminal coupled to ground. In response, the drive piezoelectric actuator controls the position of a head in a head gimbal assembly. A reference piezoelectric actuator, characterized by dimensional and electro-mechanical properties substantially matching those of the drive piezoelectric actuator, is included in the driving circuit. The driving circuit controls the reference piezoelectric actuator so that a voltage is produced across the terminals of the reference piezoelectric actuator, wherein that voltage is proportional to the charge stored in the reference piezoelectric element. That voltage is transmitted through a buffer amplifier to the drive piezoelectric actuator where it creates in it a charge equal to the charge in the reference piezoelectric actuator. In response, the drive piezoelectric actuator moves the read/write head, performing the desired positioning according to the control signal."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Driving circuit for a piezoelectric actuator","description":"A driving circuit is configured to apply a drive signal to a first terminal of a drive piezoelectric actuator having a second terminal coupled to ground. In response, the drive piezoelectric actuator ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9627602","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-9627602","citation_suggestion":"Patentable. \"Driving circuit for a piezoelectric actuator\" (US-9627602). https://patentable.app/patents/US-9627602","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9627602","json":"https://patentable.app/api/llm-context/US-9627602","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T09:20:10.862Z"}