Patent ID: 9472747
Filing Date: 2016-10-18
CPC Classification: B06B,G01N,H01L

Claim Text:
1. An ultrasonic transducer driving circuit comprising: an output line connected to an ultrasonic transducer; a voltage output type circuit configured to control an output voltage and to supply an electrical current to an output line for driving an ultrasonic transducer; and a first current discharge circuit and a second current discharge circuit each connected to the output line, wherein: said output line includes a first output line and a second output line, wherein the first output line connects said voltage output type circuit to both said first current discharge circuit and said second current discharge circuit, and said second output line connects the ultrasonic transducer to both said first current discharge circuit and said second current discharge circuit: said first current discharge circuit is configured to allow a current arising from electric charges accumulated in the ultrasonic transducer to flow from the output line to ground when the output line is at a positive voltage; said second current discharge circuit is configured to allow the current arising from the electric charges accumulated in the ultrasonic transducer to flow from ground to the output line when the output line is at a negative voltage; and said first current discharge circuit and said second current discharge circuit are controlled by a voltage difference between said first output line and said second output line.