A circuit for automatically driving a mechanical device at its resonance frequency is provided. To do so, the circuit detects non-resonance driving conditions of the mechanical device being coupled to and driven by such circuit. Based on such detection, the circuit generates a signal to drive the device...http://www.google.es/patents/US6339368?utm_source=gb-gplus-sharePatente US6339368 - Circuit for automatically driving mechanical device at its resonance frequency
Circuit for automatically driving mechanical device at its resonance frequency
