PubMed · 7222333
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M M Warren. 1981. Automatic retractor holder: new self-retaining retractor.. https://doi.org/10.1016/0090-4295(81)90271-5
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High power ultrasonic transducers for medical surgery require closed loop regulation of operating frequency and amplitude. This is a tutorial design paper which provides a description of the fundamental component properties and the criteria which are required to drive a power ultrasonic transducer. In addition, a classical root locus system analysis of the regulator servo in conjunction with requirements for idealizing individual blocks is also provided.
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