JPS5917715A - Comb line filter - Google Patents

Abstract

PURPOSE:To miniaturize a comb line filter and to facilitate its production, by using two ultrasonic delay lines. CONSTITUTION:A main body part 11a of the first ultrasonic delay line provided with a pair of transducers 3a and 4a and lead wires 8a, 9a, and 7a for input, output, and earth and a main body part 11b of the second ultrasonic delay line provided with a pair of transducers 3b and 4b and lead wires 8b, 9b, and 7b for input, output, and earth are piled up and stored in a case 23 having four terminals 18-21 arranged in line. Lead lines 9a, 8b, 8a, 9b, 7a, and 7b are connected to terminals 18-20, and a resistance 12 for mixing is connected between terminals 19 and 20. Four terminals 18-21 are arranged in line, and their lengthwise direction is vertical to plate surfaces of delay mediums 1a and 1b, and lead wires 7a, 7b-9a, and 9b and the resistance 12 are held between slits 22 and do not cross one another to obtain a prescribed delay time.

Description

[Detailed description of the invention] Ori field of Madojo The present invention relates to a comb-shaped filter.

The comb-shaped filter is a filter used for the same purpose as the above-mentioned color image whisperer, and by combining the delay time No. 16 and the through-1d, The frequency ridge spacing is such that the annihilation range and the passing range appear in the μ-th row of a comb garden. 〇 Conventional configuration and its problems Conventional comb filters were constructed by incorporating a single ultra-offshore wave delay cell as shown in Figure 1 into a simple circuit as shown in Figure 2. . To explain in detail, in Fig. 1, h (υ is the material of the glass) jJy is a retarded class body for super-transmission, and (2) is a retardation class for evaporation etc. on this retardation medium. This is a NFC lid, and on top of this lid (2) is a transducer (3J (4)) with a hanger, which is solidly mounted in a dead layer.These transducers? (3J
(4) surface ICrt steam shield, etc. ♀Yuune Shin (5)
(6) is formed δn. Yusuke Taninami (2) (5)
A single-manpower grounding cable H (7), an output cable H (8), and a cable H (9) for output are attached to the cover L in (B) using solder or conductive glue, respectively. And said m M 'I
t ffl (2J (manpower No. 18 turtle voltage during 57 hours)
When the sword is opened, the S-eye IJ transducer (3) moves, and the super-Shusaka vibration is excited from the central part to 10,000 times.
n, inside the delay medium? It is transmitted through the connecting path uU and sent to the gfJg own transducer (4) [reaching the weir].
It is excited to ``L'' and is taken out as the output ``electric ratio'' at 2 halo month H.Here, the amount of S female path 4 is 1
Let t be the deviation of 't# in the 1M geometer IJ, then the delay time, that is, the time when the ultrasonic wave reaches from the ^1 transducer (3) to the second transducer (4) iC [5] is τ-1/ Represented by v. Delay media currently commonly used in ICs (
tF 4 t' u of υ, 1fJ2.55KMy's
ea, and thus a delay time τ of 64 μsec, a path length j of approximately 162 u is required. Therefore, as shown in Figure 1, one corner of the delay medium +IJ is notched at 45 degrees to form an f+ surface, and
AIl 1st and 12th transducers (37(4)
By installing a retardation medium (a path in which the super cover wave is reflected at a reflection angle of 45° within υ), the main body of the gravel retardation gland is made smaller. There is.

Then, between the input lead storage (8) and the output lead storage (9) of the ultrasonic delay of #Il configuration, there is a mixing unit for 1 mixing of the through No. 18 and the delay No. 16 as in 42. The resistor u21t is left unrestrained, and this fLk package OF
As g, the terminal field is also matched to a low rate (b).

By the way, in this comb-shaped filter, which is connected to the signal impedance (to) and the ground v', the above-mentioned camphorina M and path length are Further miniaturization of the delay medium due to the need for K has a problem, i.e., 1 reflection time, and the curved side becomes smaller in the pupil by making the delay medium smaller, and the transducer T. - It must be significantly bulkier, but the smaller the transducer, the lower the efficiency will be.
The directivity of the cMi sound waves also decreases, and the performance against matchmaker loss and anxiety reflection noise deteriorates.

Purpose of the Invention The present invention #i solves this problem and solves two ultrasonic delays #
! By cascading the area □, the delay time ft4
The samurai served a small and expensive 1g order.

Moreover, the purpose is to provide a comb-shaped filter for each station of the equipment.

Composition of the invention The present invention therefore includes a pair of transducers.

Lead pins for input, output and grounding and t7nzof'
4 terminals 1 with the first and second super sesaka slow Zuigan arranged in -Yu I no! - It is stored in a case that can be held on the shoulder in a flat state, and the first terminal has the first ultrasonic delay line output lead female and the human power lead fa2 of the ultrasonic delay line g2.
, the second terminal is connected to the human power lead of the ultrasonic delay line of 1g2, the third terminal is connected to the output lead of the 1g2 ultrasonic delay line, and the fourth 1st and 2J on the terminal! Connect the grounding end of the ultrasonic delay line No. 2,
By connecting a resistor to the second and third terminals and using two ultrasonic delay lines, it is possible to reduce the path length required for each n, thereby achieving a compact design while maintaining performance. Using ultrasonic delay 12. The lead openings of the four terminals and the mounting portions of the resistors are such that the leads do not intersect, and the self-lead forming provides an easy comb-shaped filter at the front and heel.

Preferably, the first and second ultrasonic delay lines are arranged so as to be perpendicular to the plane through which the ultrasonic propagation axes pass t'L.
This method prevents the valley leads from being bent in the thickness direction of the delay medium, so they can be cut at the sharp f# part of the delay medium.
[This can prevent the formation of short sections on the delay medium. Also.

1111 By forming a slit in the mounting part that is perpendicular to y to "l" which the ultrasonic low-oil path follows, p, the first ultrasonic wave M Jizo's valley By holding the wire in the slit and holding all the leads of the primary resistor, the wire can be carefully worked on by the staff, and there is no need for the man-hours of winding the lead. The fibers can be assembled together and attached to the slit using the 11" method of soldering, and can be assembled in the same number of man-hours as it takes to assemble a comb filter that seals a single ultrasonic delay line. 1(
! Soldering does not go to one place smoothly and the reliability of soldering deteriorates. Description of Embodiment An example of the present invention will be described below with reference to FIGS. 3 and 4. In addition, the four components h that are actually the same as those explained in the first cause and FIG. Regarding the first ultrasonic delay line for the two black lines, please refer to reference 4.
Regarding the second ultrasonic wave m rml, the explanation will be omitted by adding ``study'' to the reference number. In Figure 3 and Figure A4, the output lead wire (9a) of the first ultrasonic delay line
and the input lead wire (8b) of the second ultrasonic delay line are 2
The human power lead wire (111) of the ultrasonic delay line is connected to the first terminal tube provided in the package case IMI that houses the main body part C11 (111)) of the 41 ultrasonic delay lines.
8a) is connected to the terminal - of side 2, and the second superwave delay d
At output lead wire (9b)! (Connected to the terminal tray of 3, the grounding lead of the 1st and 2nd ultrasonic delay line #
l (7a) and (7b) are connected to the terminals of Ugly 4, and the leads of the mixing tray ■ are connected to the second terminal - and the third terminal tray 1c. The fourth terminals are arranged in the package case (4) J[- column in this order.

The delay medium (provided perpendicularly to the plate surface of 1st (1b)) is attached to the lead wire attachment part of each terminal in the longitudinal direction of the terminal. This is the slit formed, and the S front H valley lead wire is held in this slit. There is a solid coupling agent coil interposed between the ground and both ultrasonic delay lines.

It is connected between the first terminal (E) and the fourth terminal (211).

Then, in the state shown in Fig. 4, the valley lead m (7a)
(7b), (8a), (8b), (9a), and (91)) and the leads made of the mixing resistor are all connected to the first to fourth terminal tubes to the split Vc without any confusion.

Effects of the Invention The uninvented comb-shaped filter can be miniaturized while maintaining the p performance by making two supercontinuous wave slow regions (I) 14u and ψ from the above explanation. Moreover, since the lead wires are not complicated, wiring lead 7 ohm wiring is easy and manufacturing is easy, and it is also compatible with comb filters using one ultrasonic delay line. The guilt that can be possessed has a great effect.

[Brief explanation of drawings]

1 and 2 show a conventional example, where FIG. 1 is a side view of a conventional ultrasonic delay line, and FIG. 2 is a circuit diagram of a comb filter. FIGS. 3 and 4 show an embodiment of the present invention, and FIG. 3 is a circuit diagram of a comb filter, JJ! Figure 4 is a perspective view. (la) (lkl) is a delay medium, (3a bar 3b) (4a
) (4ri is a transuser, (7a) (7b) is a grounding lead m, (8a) (8b) is a lead forest for human power,
(9th (9b) is output lead #!, 4th is Dengei Dokuro,
(11 a

Claims (3)

[Claims] (1) A pair of transducers and four terminals arranged in a row of first and second ultra-single-wave delay gates each equipped with lead wires for human power, output, and ground. The first terminal is stored in a case with the first
The output lead wire of the supercontinuous wave delay line and the human power lead for the second supercontinuous delay line #! and the terminal VC of the glass 2 is connected to the first
The human power lead wire of the ultrasonic delay is connected to the third terminal iC, and the output lead wire of the second ultrasonic delay is connected to the third terminal iC.
A comb-shaped filter in which the grounding lead shafts of the first and second backwave delay lines are connected to the fourth terminal, and resistors are connected to the second and third terminals. (2) A patent claim in which the mounting portions of the four terminals and the resistor are perpendicular to the plane along which the ultrasonic wave paths of the first and second ultrasonic waves trace back. range 1
The comb filter described in section (3) slits are formed in the mounting portions of the four terminals of the four terminals in a direction perpendicular to the plane through which the ultrasingle wave transmission path passes. The comb filter described in .