JPS6321583A - Transmitter/receiver for ultrasonic apparatus and the like - Google Patents

Abstract

PURPOSE:To facilitate the IC designing with a decrease in the number of parts, by connecting output terminal of driver elements within a transmitting circuit group as combination of a plurality of transmitting circuits in common to be linked to one receiving circuit. CONSTITUTION:Transmitting circuits 4 containing driver elements 41 and 42 are connected to a plurality of transducers 10 one per each and the transducers 10 are charged through a cable 50. Discharging is performed through a common wire 51 and a diode 62. Therefore, the transmission to the transducers 10 can be controlled as desired by a control signal 20 applied to elements 41 and 42. Received signals generated in the transducer 10 are introduced to a receiving amplifier 61 from the cable 50, the element 42, the common wire 51 an a load resistance 63. Thus, only when the element 42 is ON, the received signals are introduced to the amplifier 61 and the element 42 functions as switch for a low-level analog receiving signal.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to ultrasonic diagnostic equipment and the like. The present invention relates to a signal transmitting/receiving device for transducers arranged in an array or two-dimensionally, and particularly to a signal transmitting/receiving device having a multiplexer function for multiple channels and a circuit configuration suitable for integration into an integrated circuit.

[Conventional technology]

2. Description of the Related Art In electronic scanning ultrasonic diagnostic equipment and the like, array transducers are used in which a large number of transducer elements are arranged in a straight line or in a specific curved line. Then, a group of elements corresponding to the transmitting/receiving aperture is selected, and waves are transmitted and received while sequentially scanning them. Therefore, independent transmit and receive signals are required for all elements.

However, if a transmitting circuit and a receiving circuit are used for each element, the number of parts required and the length of the signal cable will increase.

The number increases. For this reason, conventional equipment uses a number of transmitting and receiving circuits corresponding to the transmitting and receiving aperture.

A configuration is adopted in which these wave transmitting/receiving circuits and the transducer element are connected via a switch.
No. 967, etc., describes a bag gap using the above switch. The switches used in these devices are required to turn on and off high-speed, high-voltage pulse signals when transmitting waves, and at the same time turn on and off low-level analog No. 13 when receiving waves. Therefore, the switching element is required to simultaneously have high breakdown voltage characteristics, the ability to quickly switch pulse signals with large peak current values, and low noise characteristics with low on-resistance. Furthermore, the wave transmitting/receiving device requires means for protecting the wave receiving amplifier from high voltage during wave transmission.

[Problem that the invention seeks to solve]

As mentioned above, in the conventional technology, when sequentially transmitting and receiving waves to and from a large number of transducer elements arranged in an ultrasonic diagnostic device, etc., an independent transmitter circuit is required for each element without using a switch. There is a problem in that the number of transmitter/receiver circuits and components is enormous, and the number of transmitter/receiver circuits and components is enormous. If you prepare a wave receiving circuit and connect these wave transmitting/receiving circuits to the elements in the group via a switch, and transmit and receive waves sequentially for each group by switching the switch, the switch has a In addition to the ability to turn on and off high-speed, high-voltage pulses, low-noise characteristics during reception are required, and there is a further problem in that a control circuit for these switches is required in addition to driver control. Furthermore, as a wave transmitting/receiving device, it is necessary to protect the wave receiving amplifier from high voltage during wave transmission, but in the prior art, it was necessary to prepare these protection means separately from the driver or the wave receiving amplifier.

An object of the present invention is to provide a wave transmitting/receiving device for an ultrasonic device or the like, which can solve the above-mentioned problems in the prior art. Specifically, for transducer elements arranged in large numbers in an array or two-dimensional form, the circuit configuration is suitable for variable aperture control and scanning control required in ultrasonic devices, etc., and high voltage It is an object of the present invention to provide a wave transmitting/receiving device that does not require any special elements for protection and has a circuit system suitable for integration.

[Means for solving problems]

The above purpose is to arrange a transmitter circuit for each transducer element, which includes a driver element that has a transmitter driver function and a selection switch function as well as a switch function for low-level signals, and to This is achieved by connecting the output terminals of each driver element in a wave transmitting circuit group consisting of a plurality of correspondingly determined combinations of wave transmitting circuits, and then guiding them to one wave receiving amplifier.

As one specific circuit configuration of such a wave transmitting/receiving device, the driver element is composed of two switch elements, a first switch element and a second switch element, which are controlled to open and close according to a control signal, and applying a DC voltage to one end, connecting the other end of the first switching element and one end of the second switching element, and connecting this connection end to the transducer element;
Then, the other end of each second switch element in the wave transmitting circuit group is connected in common and connected to one wave receiving amplifier,
Furthermore, there is a configuration in which the other ends of the DC voltage source, transducer element, and receiving amplifier are connected to a common potential point.

[Effect]

If the output terminals of the driver elements of multiple transmitter circuits are commonly connected and guided to one receiver amplifier, the switch element connected to the receiver amplifier of the multiple transmitter circuits is turned on. Channel signals can be selectively received. Further, when the switch elements of the plurality of wave transmitting circuits are turned on at the same time, the sum of the signals of the plurality of wave transmitting circuits can be detected by the wave receiving amplifier.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a circuit diagram of a first embodiment of the present invention. In FIG. 1, 10 is a transducer, 20 is a control signal, 30 is a DC power supply, and 40 is a front driver.

41 and 42 are driver elements, 50 is a cable or wiring, 6I is a receiving amplifier, 62 is a diode, 63 is a load resistor, and 64 is an inductor. The front driver 40, driver elements 41, 42, etc. constitute the wave transmitting circuit 4. In this embodiment, the driver element 41 is a P-channel type M
An N-channel type MOS N field effect transistor is used as an O3 field effect transistor and the driver element 42. Receiving amplifier 61,? Iode 62, load resistance 63. The wave receiving circuit 6 is composed of an inductor 64 and the like.

Note that the inductor 64 is inserted in parallel with the parasitic capacitance of the cable 50 and the transducer 10, and compensates for the capacitance due to its resonance characteristics.It may be installed as necessary, and may not be necessary in some cases. . Each transmitter circuit 4
are respectively connected to the transducer 10 by a cable 50, while one end of the driver element 42 in each wave transmitting circuit is connected to a common line 51 and guided to one wave receiving circuit 6.

In the above configuration, the driver element 41 is now off,
In state S, in which 42 is on (hereinafter referred to as state "O"), no voltage is applied to transducer 10. Next, the driver element 41 is on and the driver element 42 is off (hereinafter the state "1").
''), the driver element 41 .
A voltage is applied to transducer 10 via cable 50 . Driver element 41.4 according to control signal 20
When the state of 2 changes from "0" to "1" to "0", the transducer 10 is charged from the power supply 30 through the driver element 41 and the cable 50 during the state 74179,
During the next period of state "0", the cable 50, driver element 42, common line 51 . It is discharged through the diode 62. Of course, load resistance 63. It is also discharged through the inductor 64 and the like.

Due to the above operation, the transducer 10 is placed in state 1 (
A pulse voltage is applied only for a period of I11.

This period is determined in conjunction with the characteristics of the transducer 10. Further, by repeating the above operation, a corresponding pulse voltage is applied. Here, driver elements 41 and 42 are provided for each of the plurality of transducers 10.
Since the transmitter circuits 4 including the
Each transducer is charged through its respective cable and discharge is through the common line 51, diode 62. Therefore, the transmission of waves to each transducer can be arbitrarily controlled by the control signal 20 applied to each driver element 41, 42. On the other hand, the received signal (echo signal from an ultrasonic diagnostic device, etc.) generated by the transducer 10 is transmitted to the cable 50. Driver element 4
2. The common line 51 is led to the receiving amplifier 61 from the load resistor 63. Therefore, the received signal is guided to the receiving amplifier 61 only when the driver element 42 is in the on state. That is, the driver element 42 also functions as a switch for low-level analog reception signals.

Therefore, by selectively controlling the switch function for a plurality of transducers, the reception signal of only the selected specific transducer can be guided to the reception amplifier. In other words, each driver element 42 functions as a multiplexer for the received analog signal. The amplitude of the received signal is usually smaller than the forward voltage of the diode 62, and only the resistor 63 serves as a load for the received signal. Since the discharge current during wave transmission mainly flows through the diode 62, the current in the inductor 64 is very small.

FIG. 2 is an explanatory diagram of control and operating states in the embodiment of FIG. 1. In Fig. 2, each in j+ has a transmitting/receiving circuit of 1+ J+ k channels.

41i, 42i, etc. indicate driver elements in the i channel. For the i channel, a pulse with a width τ is transmitted from time t. After time t2, the discharging of the transducer is completed in a period of τ2. That is, during the period t~, the mode is in the wave transmitting mode, and from time t onwards, the mode is in the wave receiving mode. On the other hand, for the j channel, the state "0" continues throughout the period t1 to t until time t7, and no wave is transmitted. However, the wave receiving circuit system is in the wave receiving mode, and if there is a signal from the J channel transducer, it is guided to the wave receiving amplifier. In the k channel,
The transmitting mode starts from the time t, but when the discharge to the transducer ends during the period t to t6, the driver element 4
1k.

At 42, both are turned off, and the transducer and receiver amplifier are disconnected. That is, the k channel is a channel that transmits waves but does not receive waves. Also, from time t until 1 time later, both lvJ channels are in the receiving state, and during this time x
+ jh The reception signals from the transducer both enter the reception amplifier. therefore.

If the input circuit and receiving amplifier for both signals are configured as an adding circuit, the sum of both signals can be detected.

As explained above, regarding 1+J+k channels, both l+j+k transmit waves, any two transmit waves, or any one transmits waves. In either case, there is a possibility that no waves are transmitted.

Regarding wave reception, both Jy, J+, and k receive the wave, or any two of them receive the wave. Either one of them receives the wave, or none of them receive the wave. Furthermore, regarding a specific channel, there are two types: transmitting and receiving waves, transmitting waves but not receiving waves, not transmitting waves but receiving waves, and neither transmitting nor receiving waves. The overall device can perform the desired functions by controlling the device to be a combination of the above-mentioned shapes. All of the above controls are achieved by controlling the driver elements 41 and 42 of each channel on and off using the control signal 20 of each channel.

FIG. 3 is a circuit diagram showing a second embodiment of the present invention, which is an example applied as a wave transmitting/receiving circuit for a large number of transducers arranged in an array. The transducer group 1 is formed by arranging a large number of strip-shaped transducers 10 of the same shape in an array. The wave transmitting circuit 4 is provided for each transducer 10 in the transducer group 1, while one wave receiving circuit 6 is provided for each combination of a plurality of transducers 10 in a specific arrangement position. That is,
One common receiving circuit is provided for the plurality of transducers IO in the combination. i in Figure 3.

j indicates those sets. The configuration of this embodiment is effective when applied to a linear electronic scanning ultrasonic diagnostic apparatus and the like.

In this case, the spacing of the transducers a commonly coupled into one set is selected to be the maximum value of the aperture forming the ultrasound beam of the diagnostic device. By doing so, two or more wave transmitting/receiving circuits connected to the same set do not operate at the same time, and the configuration of the device described above can be simplified. Further, if these sets are integrated into a circuit, there is no simultaneous operating channel, so there is an advantage that even if multiple channels are integrated, the circuit can be operated with less power.

FIG. 4 is a circuit diagram showing a third embodiment of the present invention. In this embodiment, the driver element is a transistor 410.42
0, and the diode 412, resistor 413, capacitor 414, etc. constitute the front driver and its bias circuit. Furthermore, although the transistor 421 can function as a driver element, it can also function only as a wave receiving switch.

At this time, in order to independently control the wave transmitting and wave receiving functions, the wave transmitting control signal system 20, 22 and the wave receiving control signal system may be provided independently. By using the circuit configuration shown in FIG. 4 as the wave transmitting circuit 4 of the embodiment shown in FIG. 1 or 3, the same functions and effects as in the embodiment described above can be obtained.

FIG. 5 is a circuit diagram showing a fourth embodiment of the present invention, and this is an example in which the transducer group is arranged in a two-dimensional manner instead of a one-dimensional arrangement as shown in FIG. 1
A case will be described in which transducers divided into three parts, 0-1.10-2.10-3, are arranged in an array.

A wave transmitting circuit 400 corresponding to the wave transmitting circuit 4 in FIG. 3 is coupled to each of these three divided sets. l+J is used to have the same meaning as in FIG. Said wave transmitting circuit 40
0 is transducer 10-1.10-2.10-3
As shown in FIG. 6, the wave transmitting circuits 4-1.
4-2.4-3 are combined. Each transmitter circuit has a first
It is assumed that a wave transmitting circuit having the configuration shown in Fig. 4 or Fig. 4 is used.

The common line 51 of the wave transmitting circuit 4-1.4-2.4-3 is connected to the common line 51 of another similar circuit group and guided to the wave receiving circuit 6.

In this example, the three-part transducer -1
Regarding 0-1.10-2.10-3, one or more of them are controlled to transmit and receive waves at the same time, so their sum signal flows through the common line 51, and these transducers are arranged in an array. For pairs such as i or j, the same as in the case of Fig. 3 is applied.

Only one set of them is controlled to operate. As a result, it is possible to perform linear scanning similar to that shown in Fig. 3, and at the same time to control transmission and reception in a direction perpendicular to the scanning direction, that is, in the short axis direction of the two-dimensionally arrayed transducer group 1. Quality can be significantly improved. Furthermore, even if the number of divisions in the short axis direction is increased, this can be easily handled by applying a similar method.

FIG. 7 shows an example of a specific control method. A switch 401 in FIG. 7 represents the wave transmission/reception function of the driver element in FIG. 1 or 4 as a switch. Here, a three-part transducer 10-1.1
0-2.10-3 is divided into a central one 10-2 and one side 10-1.10-3, and the center is controlled in the same manner as the embodiment in FIG. .

It shall be possible to control the separation and addition of these elements at the same time. Such control allows the width of the transducer in the short axis direction to be varied. Furthermore, instead of controlling whether or not to separate the center and both transducers as shown in Fig. 7, if both transmission and reception are controlled at predetermined timings, the ultrasonic waves will be Convergence and deflection can be controlled.

As explained above, the present invention is a device in which a driver element constituting a wave transmitting circuit is simultaneously used as a control switch for a received wave signal, or a switch element for controlling a received wave signal is coupled to the wave transmitting circuit. Therefore, the circuit configuration and control method of the front driver, as well as the configuration of the wave receiving circuit and the signal detection method (for example, whether it is a voltage detection method or a current detection method) are the same as those shown in the above embodiment. but not limited to. However, by combining it with a current detection type receiving circuit, a new effect can be obtained in that the current addition function of the received signal can be easily realized.

FIG. 8 is a circuit diagram showing still another embodiment of the present invention,
This can be achieved by inserting a damping resistor 51 into the cable 50 near the connection point P between the driver element 41, 42 and the cable 50, and by appropriately selecting its resistance value, the impedance of the cable and the wave transmitting/receiving circuit can be reduced. The aim is to suppress unnecessary vibrations that occur and improve the transmission and reception characteristics of pulse signals. In other words, in the case of a method in which transmitting pulses are supplied to a piezoelectric transducer from a low-impedance power source, that is, a voltage source drive method, when the driver element and the transducer are connected with a cable, unnecessary vibrations due to the impedance elements attached to them are generated. This causes a problem of deteriorating the characteristics of the information detected by the ultrasonic device. The embodiment shown in FIG. 8 provides a means for solving this problem.

Focusing on the fact that unnecessary vibrations that degrade the characteristics of transmitted and received pulse signals are mainly resonances caused by the parasitic capacitance of the transducer and cable, and the parasitic inductance of the cable, we lowered the Q value of these resonant circuits. The structure is such that a damping resistor having a resistance value that provides optimum damping conditions is inserted. In Figure 8, 10
20 is a transducer, 20 is a transmission pulse signal, 30 is a DC power supply with voltage V)l, 41.42 is a driver element, 50
is a cable, 55 is a damping resistor, and 61 is a receiving amplifier. The transducer 10 receives a transmission pulse signal 2.
A transmitting pulse voltage controlled at 0 and having an amplitude of approximately V)I is applied. Therefore, the driver elements 41 and 42 are controlled to be turned on and off by the dimming shown in FIGS. 9(a) and 9(b), respectively. As the driver elements 41 and 42, as in the case of FIG. 1, also in the embodiment of FIG.
P-channel type and N-channel type M○S field effect transistors are used, respectively. Front driver 22, resistor 413
, capacitor 414, etc. constitute a circuit for controlling the driver elements 41, 42 at the above timing.

Then, a pulse voltage having a pulse width τ and an amplitude VH shown in FIG. 9(c) is applied to the transducer 10. Here, it is chosen to be 1/2 of the resonant period of the transducer. In FIG. 8, if there is no damping resistor 51, the waveform at the connection point P between the driver elements 41 and 42 and the cable 50 will be a pulse waveform as shown in FIG. 9(c), but at the Q point on the transducer side. The waveform of is accompanied by extra vibration as shown in FIG. 9(d). The ultrasonic waveform transmitted from the transducer is preferably a pulse waveform as shown in FIG. 10(a). Here, the pulse length T is related to the temporal resolution of the object measured by the ultrasonic device, and in order to increase the resolution, it is desirable that T be short. This is related to both the characteristics of the transducer (ie, the Q value of the mechanical resonant circuit) and the characteristics of the transmitted pulse. When driving with a waveform with extra vibration as shown in Fig. 9(d), Fig. 10(b)
The waveform of the transmitted ultrasonic wave is disturbed, and the time T' is lengthened, degrading the characteristics of the detected information. The cause of the extra vibration shown in FIG. 9(d) will be explained with reference to the schematic equivalent circuit shown in FIG. 11. The driver section is approximately represented by a pulse voltage source 45 and a signal source resistor 450, and the transducer lO is represented by an inductor 101. It is approximately represented by a capacitor 102, a resistor 103, and an interelectrode capacitance 100, and the cable 50 is represented by a series inductance 500 and a parallel capacitance 510. If the resistance value of the resistor 450 is R3, the inductance of the inductor 500 is the inductance, and the combined capacitance of the capacitors 510 and 100 is C, then the resonance angular frequency ω, = 1iJ and -2Q value is determined by Rs, L, and C from the signal source. = (1) v L /
A series resonant circuit of Rs is formed. Therefore, in the case of a voltage source drive with a low R5, as shown in Figure 9(d), unnecessary vibration occurs due to the series resonance characteristic, and the voltage waveform at point Q on the transducer side is different from the voltage waveform at two points on the driver side. Unlike above, it is synthesized with the unnecessary vibrations mentioned above. To suppress unnecessary vibration caused by the above series resonant circuit,
It is effective to increase R3 and lower the Q value, so-called Q dump using a series resistor. The resistor 55 in FIG.
In the equivalent circuit shown in the figure, it is connected in series with the resistor 450, increasing R5. The value of the resistor 51 is determined by the driver, cable,
Although it depends on the resistance of the transducer, it is preferably about 10-odd ohms to several 10-odd ohms. That is, the value of the resistor 51 is r
If the r that makes the Q value of the above circuit 1 is rII, then r'=v''L7' is obtained from -R5.Resistance 51
If the above r + 1 or a value close to it is used as
At that time, the waveform at the 0 point on the transducer side is shown in Figure 9(e).
A good drive waveform can be obtained.

FIG. 12 shows another embodiment. In this embodiment, the damping resistor 55 shown in FIG. 8 is separated into two resistors 52 and 53. Resistors 52 and 53 are transistors 41 and 4, respectively.
It functions as a damping resistor during the ON period of 2. Therefore, the on-resistances of the transistors 41 and 42 (corresponding to the resistor 450, ie, R5 in the equivalent circuit of FIG. 11) are selected so as to obtain the optimum conditions. As is clear from FIG. 12, the resistors 52 and 53 are connected to the transistor 41.
．． 42, these on-resistance values can be used as damping resistances. The element area of the transistors 41 and 42 is determined from the withstand voltage, current value, and on-resistance conditions.

From the above relationship, this is an advantageous condition when integrating the driver circuit, compared to the requirement for reducing the on-resistance as much as possible in a normal switch element.

FIG. 13 shows yet another embodiment. In this embodiment, a P-channel transistor 411 . This is realized by a circuit consisting of an N-channel transistor 410 and a diode 412. N-channel transistors 420 and 42
1 can have an equivalent function to the N-channel transistor 42 in FIG.
．． It also functions as a switch that separates the 62.60 and the wave transmission driver circuit. In this embodiment as well, the resistor 55 achieves optimal damping conditions.

FIG. 14 shows yet another embodiment, and this embodiment shows a circuit in which damping resistors 52 and 53 are separately added to the driver circuit of the type shown in FIG. 13. resistance 5
2.53 can be placed on the drain side of the transistors 410 and 420, respectively, to obtain damping characteristics without affecting the switching characteristics of these transistors. Note that in this embodiment as well, it is possible to obtain a damping function using the on-resistance of the transistors 410 and 420.

Note that in any of the above embodiments, the driver element 4
The configuration method and control timing of the on/off control circuit such as 1.42 or 411.410.420.421 are as follows.
It goes without saying that the format is not limited to the format shown in the above embodiment. It goes without saying that the polarity of the P-channel, N-channel, DC type [30], etc. of the transistor can also be changed.

This has been explained above using the embodiments shown in FIGS. 8 to 14. If you adopt a configuration that adjusts the damping resistance to the optimal value.

Due to the parasitic impedance of the driver circuit, transducer, and the cables and wiring that connect them, it is possible to suppress unnecessary vibrations in the pulse voltage applied to the transducer, and it is an extremely simple means of preventing characteristic deterioration of information detected by ultrasound equipment, etc. This can be prevented by In addition, the above means makes it possible to actively utilize the on-resistance of the transistor element constituting the driver circuit, and has the effect of facilitating the design of the element. Furthermore, this is particularly effective when the driver circuit is implemented using an integrated circuit, in view of the degree of freedom in element design, the area occupied, and the like.

〔Effect of the invention〕

As explained above, according to the present invention, for transducer elements arranged in an array or two-dimensional form in an ultrasonic device, etc., convergence control, aperture variable control, and scanning control necessary for the device described above can be performed. It is possible to obtain a wave transmitting/receiving circuit device that is suitable for control, etc., and is especially suitable for integration into an integrated circuit. Furthermore, according to the configuration in which a damping resistor is inserted on the driver element side of the cable connecting the driver element and the transducer element in the embodiment section, unnecessary vibrations generated due to the impedance of the cable and the wave transmitting/receiving circuit can be suppressed. , can be suppressed with a simple configuration of adding a resistor.

[Brief explanation of drawings]

FIG. 1 is a circuit configuration diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the control and operating state of FIG. 1. FIG. 3 is a diagram showing a second embodiment of the invention, FIG. 4 is a circuit diagram showing a third embodiment of the invention, and FIG. 5 is a circuit diagram showing a fourth embodiment of the invention.
FIG. 6 is a detailed view of a part of FIG. 5,
FIG. 7 is a circuit configuration diagram for explaining a specific control example in the embodiment shown in FIG. 5, FIG. 8 is a circuit configuration diagram showing still another embodiment of the present invention, and FIGS. e) is an explanatory diagram of the operation and pulse waveform in Fig. 8, and Fig. 10 (aL(b)
11 is an explanatory diagram of the ultrasonic pulse waveform transmitted from the transducer, FIG. 11 is a diagram explaining the operating principle of the embodiment in FIG. 8 using a schematic equivalent circuit, and FIG. 12, FIG. 13, and FIG. FIG. 7 is a diagram showing still another embodiment of the invention. <Explanation of symbols> 1... Transducer 4... Wave transmitting circuit 6...
Receiving circuit 10...transducer 20...
...Control signal 30...DC power supply 40...
Front driver 41.42...driver element 50
... Cable 51 ... Common line 61 ...
Receiving amplifier 55. 52, 53... Damping resistor 63... Load resistance Junnosuke Nakamura film L4 16 Te4 Middle 3 Figure 5 Off figure and 8 Figure '1n Year 9 Figure Year 10 yen (T'〉T) Figure 11 Figure 12 Corner Figure 13 n

Claims (1)

[Claims] 1. In a wave transmitting/receiving device that supplies pulse power to a large number of transducer elements arranged in an array or two-dimensionally and receives signals from the transducer elements, the transducer elements are arranged in a predetermined manner. A wave transmitting circuit including a driver element that is selectively driven in accordance with a control signal is disposed for each transducer element, and a wave receiving circuit is provided that selectively detects a signal from the transducer element in accordance with a predetermined control signal. and an ultrasonic device characterized in that the output terminals of each of the driver elements in a wave transmitting circuit group formed by combining a plurality of the wave transmitting circuits are connected in common, and this is connected to the one wave receiving circuit. Wave transceiver equipment in etc. 2. The driver element of the wave transmitting circuit consists of two switch elements, a first and a second switch element, which are controlled to open and close by the control signal, one end of the first switch element is connected to a DC power source, and the first switch element is connected to a DC power supply. The other end of the element is connected to one end of a second switch element, and this connection end is connected to the transducer.
element, the other ends of each of the second switching elements in the wave transmitting circuit group are commonly connected and connected to the one wave receiving circuit, and the DC power supply, the transducer element, and the A wave transmitting/receiving device in an ultrasonic device or the like according to claim 1, wherein each other end of the wave receiving circuit is connected to a common potential point. 3. A series circuit of the transducer element and the cable or wiring is connected to the connection point side of the cable or wiring that connects the connection point connecting the two switch elements constituting the driver element and the transducer element. 3. The wave transmitting/receiving device in an ultrasonic device or the like according to claim 2, wherein a damping resistor is inserted which provides an optimum damping condition for resonance characteristics or a characteristic close to the optimum damping condition.