Abstract: An ultrasonic driving device with multi-frequency scanning that includes a signal generating module, an output module, and an ultrasonic transducer module. The signal generating module provides a first drive signal, the frequency of which varies within a specified range. The output module is connected electrically to the signal generating module for receiving the first drive signal therefrom, and for adjusting amplitude of the first drive signal to result in a second drive signal. The ultrasonic transducer module is connected electrically to the output module for receiving the second drive signal therefrom, and for producing ultrasounds, the frequency of which corresponds to that of the second drive signal.

Abstract: An ultrasonic driving device includes a protection module that receives a first drive signal from a signal generating module, detects an operating current of an output module, and provides the first drive signal to the output module when the detected operating current is smaller than a threshold current value. The output module adjusts the first drive signal received from the protection module to result in a second drive signal. The protection module stops providing the first drive signal to the output module such that the output module ceases to generate the second drive signal when the detected operating current is not smaller than the threshold current value. An ultrasonic transducer is connected to the output module so as to receive the second drive signal therefrom and so as to output ultrasounds, the frequency of which corresponds to that of the second drive signal.

Abstract: An ultrasonic driving device with multi-frequency scanning that includes a signal generating module, an output module, and an ultrasonic transducer module. The signal generating module provides a first drive signal, the frequency of which varies within a specified range. The output module is connected electrically to the signal generating module for receiving the first drive signal therefrom, and for adjusting amplitude of the first drive signal to result in a second drive signal. The ultrasonic transducer module is connected electrically to the output module for receiving the second drive signal therefrom, and for producing ultrasounds, the frequency of which corresponds to that of the second drive signal.

Abstract: An ultrasonic driving device includes a protection module that receives a first drive signal from a signal generating module, detects an operating current of an output module, and provides the first drive signal to the output module when the detected operating current is smaller than a threshold current value. The output module adjusts the first drive signal received from the protection module to result in a second drive signal. The protection module stops providing the first drive signal to the output module such that the output module ceases to generate the second drive signal when the detected operating current is not smaller than the threshold current value. An ultrasonic transducer is connected to the output module so as to receive the second drive signal therefrom and so as to output ultrasounds, the frequency of which corresponds to that of the second drive signal.