An ultrasound detection device comprising:
- a probe portion capable of transmitting and receiving ultrasound to and from an object;
- a transceiver capable of transmitting and receiving a signal to and from the probe portion, applying a power supply voltage to the probe portion, and detecting a voltage in accordance with a current signal using an internal resistor;
- a first wire electrically connecting the transceiver and the probe portion, and enabling the transceiver to apply a reference potential to the probe portion;
- and
- a second wire electrically connecting the transceiver and the probe portion, and enabling the transceiver to transmit a voltage signal to the probe portion and enabling the probe portion to transmit the current signal to the transceiver, wherein
- the probe portion includes:
- a first transducer capable of transmitting ultrasound to the object in response to application of the voltage signal;
- a second transducer capable of receiving ultrasound from the object, and converting the ultrasound into an electrical signal, the second transducer including a first electrode electrically connected to the first wire and a second electrode;
- a bidirectional diode connecting the second wire and the first transducer;
- and
- an amplifier circuit capable of amplifying a current, and outputting a current signal to the second wire in response to the electrical signal,
- further wherein the amplifier circuit includes:
- a first transistor including a third electrode connected to the first wire and acting as a source or an emitter, a fourth electrode electrically connected to the second electrode and acting as a gate or a base, and a fifth electrode electrically connected to the fourth electrode via a resistive element and acting as a drain or a collector, the first transistor being in a common source configuration or a common emitter configuration;
- a first resistive element electrically connecting the fifth electrode and the second wire;
- a second transistor including a sixth electrode connected to the first wire, a seventh electrode electrically connected to the fifth electrode and acting as a gate or a base, and an eighth electrode, the second transistor being of a different conductivity type from the first transistor and being in a common drain configuration or a common collector configuration, or being of the same conductivity type as the first transistor and being in a common source configuration or a common emitter configuration;
- a second resistive element electrically connecting the eighth electrode and the second wire;
- and
- a first capacitive element connecting the eighth electrode and the second wire.