| 摘要 |
An ultrasonic scanning pulse-generating apparatus includes a rotary encoder for outputting a pulse every time a motor, driving an ultrasonic transducer, rotates through a predetermined angle, and a pulse cycle-measuring circuit for measuring the one-cycle period of pulses output from the rotary encoder. An address pulse output circuit is provided for outputting a pulse during each of the periods defined by dividing the one-cycle period by a predetermined number m. The address pulse output circuit is connected to a scanning pulse-generator including an address-forming circuit for constructing address data from the address pulse obtained by the address pulse output circuit, and a memory storing scanning pulse data and addressed by the address data of the address-forming circuit, to output a scanning pulse.
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