JPH0438577Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an ultrasonic delay element, and more particularly to an ultrasonic delay element unit having an impedance element in its container.

[Prior Art] In an ultrasonic delay element using an ultrasonic delay medium made of glass or the like, in order to configure the ultrasonic delay element as a comb-shaped filter, a resistance element, an inductance element, etc. Impedance elements formed by combining capacitor elements are often mounted. Also,
Recently, a method of integrating circuit components around an ultrasonic delay element and storing the same in a container has been widely used.

[Problems to be solved by the invention] Conventionally, the use of such an ultrasonic delay element is generally limited to one type, and in order to use it for multiple purposes, an impedance element or a switching element must be installed around the ultrasonic delay element. It was used by arranging elements. In addition, in order to match the constant values of impedance elements with surrounding circuits, such as integrated circuits, depending on the application, impedance elements may be used for the same purpose but have different constant values suited to the circuit of each application. In some cases, numerical impedance elements must be used to match each circuit in the next stage of switching, resulting in twice the number of impedance elements and, of course, twice as much space on the printed wiring board. It had become necessary.

Therefore, in order to eliminate the above-mentioned conventional drawbacks, the present invention aims to provide an ultrasonic delay element unit that can be used for multiple purposes by selectively connecting external connection terminals to external circuits. It is.

[Means for solving the problem] The ultrasonic delay element unit according to the present invention includes an ultrasonic delay medium having one input-side electromechanical transducer and one output-side electromechanical transducer attached to one surface. , a container provided with an external circuit connection terminal and in which the ultrasonic delay medium is housed; and an impedance conductively connected to the external circuit connection terminal and the electromechanical transducer and housed in the container. In this ultrasonic delay element unit, two impedance elements are used, one end 3 of the first impedance element is conductively connected to the input side electromechanical transducer of the ultrasonic delay medium, and the output side electrical 1 of the second impedance element to the mechanical conversion element.
Both ends 2 and 3 of the first impedance element and both ends 1 and 6 of the second impedance element are conductively connected to different external circuit connection terminals, respectively, and the electrodes of the electromechanical transducer element are connected to each other. ,
The electrodes 4 and 5 on the side that are not conductively connected to the impedance element are also conductively connected to other external circuit connection terminals, these plurality of external circuit connection terminals are provided in a row in the container, and the impedance element is , directly connected to the external circuit connection terminal,
Both the ultrasonic delay medium and the impedance element are housed in a container, and by selecting external circuit connection terminals connected to the terminals 3, 4, 5, and 6, the ultrasonic delay line can function as a normal ultrasonic delay line. , above 2, 4,
By selecting the external circuit connecting terminals connected to 5 and 6, it functions as an ultrasonic delay element with constant insertion loss, and selecting the external circuit connecting terminals connected to 1, 2, 4, 5, and 6. An ultrasonic delay element unit characterized in that it has a function as a comb filter.

In a preferred embodiment of the present invention, an ultrasonic delay medium is housed in a container provided with external circuit connection terminals, and an output side electromechanical transducer is connected in parallel to the ultrasonic delay medium, so as to function as a comb filter. It has a built-in impedance element that can be used as an ultrasonic delay element with a constant insertion loss by connecting an electromechanical transducer on the input side in series with the ultrasonic delay medium. be. Furthermore, if a conductor is connected to the input side electromechanical transducer without connecting an impedance element, it can be used as a normal ultrasonic delay element.

[Function] When the impedance element is used as a comb filter, the optimum circuit constants are selected and combined with resistance elements, inductance elements, and capacitor elements in order to match with external circuits and adjust the phase of input signals. or one of them alone. For ultrasonic delay elements with constant insertion loss, select the optimal circuit constants to match with the external circuit, that is, to maintain constant loss, and combine them with resistance elements, inductance elements, and capacitor elements, or by combining them. Consists of one of these alone.

In the present invention, the impedance element is directly connected to the external circuit connection terminal and the container is used as a terminal board, but a terminal board is also provided, the impedance element is incorporated into it, and it is built into the container. Also good.

By providing a window in the lid of the container at a location corresponding to the position where the impedance element is placed, the lid can be engaged with the container without straining the circuit element used for the impedance element, making it more compact. It can be any shape.

[Example] FIG. 1 is a circuit diagram of an example of the present invention,
By selecting the wiring with the external circuit among external circuit connection terminal numbers 1 to 6, for example, by selecting and using terminal numbers 3, 4, 5, and 6, respectively, it can be used as one ultrasonic delay element. For example, if terminal numbers 2, 4, 5, and 6 are selected and used, it can be used as an ultrasonic delay element with a built-in matching resistor on the input side.
By selecting 5 and 6, a comb filter can be constructed. By switching these uses using an external circuit, it is possible to easily realize multiple uses with one element, and the number of circuit elements in the external circuit can be reduced.

FIG. 2 is a perspective view of a typical embodiment of the present invention, showing the state in which impedance elements are mounted. The container 9 is provided with an external circuit connection terminal 12 and also functions as a terminal board.
The ultrasonic delay medium 8 to which the electromechanical transducer 10 is attached is housed in a container 9, and the impedance element 7 and the electromechanical transducer 10 are connected to an external circuit connection terminal 12 via a lead wire 11, or the electromechanical transducer 10 is connected to the electrode section on the side surface of the ultrasonic delay medium in contact with the ultrasonic delay medium. Note that any number of external circuit connection terminals 12 may be provided as required, and the connection method of the lead wires 11 and the mounting position of the impedance element 7 can be freely selected.
Further, a lid body having a window provided in a portion corresponding to the protruding portion of the impedance element 7 to the outside may be engaged with the container 9. Further, the impedance element 7 is fixed to the external circuit connection terminal 12 by soldering, resistance welding, conductive adhesive, or the like.

[Effects of the invention] By implementing the invention, one ultrasonic delay element can be used for multiple purposes, that is, can be used for multiple purposes, depending on the wiring with the external circuit and the configuration of the circuit elements.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of the ultrasonic delay element of the present invention, and FIG. 2 is a diagram of an embodiment. 1, 2, 3, 4, 5, 6... terminal number, 7...
Impedance element, 8... Ultrasonic delay medium, 9
... Container, 10 ... Electromechanical conversion element, 11 ...
Lead wire, 12... External circuit connection terminal.

Claims (1)

[Claims for Utility Model Registration] (1) An ultrasonic delay medium having one input-side electromechanical transducer and one output-side electromechanical transducer attached to one surface, and an external circuit connection terminal attached. An ultrasonic delay comprising a container in which the ultrasonic delay medium is housed, and an impedance element electrically connected to an external circuit connection terminal and an electromechanical transducer and housed in the container. In the element unit, two impedance elements are used, and one of the first impedance elements is connected to the electromechanical transducer on the input side of the ultrasonic delay medium.
One end 6 of the second impedance element is electrically connected to the output side electromechanical transducer, and both ends 2 and 3 of the first impedance element and both ends 1 of the second impedance element are electrically connected. and 6 are conductively connected to different external circuit connection terminals, and electrodes 4 and 5 of the electromechanical conversion element that are not conductively connected to the impedance element are also conductively connected to other external circuit connection terminals, The plurality of external circuit connection terminals are provided in a row in the container, the impedance element is directly connected to the external circuit connection terminal, and both the ultrasonic delay medium and the impedance element are provided in the container. It has a function as a normal ultrasonic delay line by selecting the external circuit connection terminal that is housed and connected to the above-mentioned 3, 4, 5, and 6, and the external circuit that is connected to the above-mentioned 2, 4, 5, and 6. By selecting the connecting terminals, it can function as an ultrasonic delay element with constant insertion loss, and by selecting the external circuit connecting terminals connected to 1, 2, 4, 5, and 6, it can function as a comb filter. An ultrasonic delay element unit characterized by: (2) The ultrasonic delay element unit according to claim 1, wherein the lid of the container is provided with a window.