| 摘要 |
Provided is a small area delay phasing circuit. An ultrasonic probe comprises a plurality of circuit units, an adder circuit to add the output from the plurality of circuit units, and an input terminal to input shared signals to the plurality of circuit units. With this ultrasonic probe, each circuit unit comprises a receiving circuit and transmitting circuit that are connected to an ultrasonic transducer, and a first delay circuit. When a signal is received in the ultrasonic transducer, the receiving circuit receives a signal from the ultrasonic transducer, the first delay circuit delays the signal from the receiving circuit, the signal delayed by the first delay circuit is added by the adder circuit, and the signal added by the adder circuit is delayed by a second delay circuit. When a signal is transmitted in the ultrasonic transducer, a signal from the input terminal is delayed by the second delay circuit, the signal delayed by the second delay circuit is split and input to the plurality of circuit units, the signal delayed by the second delay circuit is delayed by the first delay circuit in each of the plurality of circuit units, and the signals delayed by the first delay circuit are input to the transmitting circuit. |
