JPH0412623U

JPH0412623U -

Info

Publication number: JPH0412623U
Application number: JP5336490U
Authority: JP
Priority date: 1990-05-21
Filing date: 1990-05-21
Publication date: 1992-01-31

Description

[Brief explanation of the drawing]

第１図は、この考案の一実施例による可変コン
デンサ１を示す、第３図の線−に沿う断面図
である。第２図は、同じく可変コンデンサ１を示
す、第３図の線−に沿う断面図である。第３
図は、可変コンデンサ１の平面図である。第４図
は、可変コンデンサ１の底面図である。第５図は
、第１および第２のステータ電極１３および１４
と第１および第２のロータ電極２２および２３と
の対向状態を示す図解的平面図である。第６図は
、第１および第２のステータ電極１３および１４
、第１の固定コンデンサ用電極１７、ならびに第
２の固定コンデンサ用電極１８ａおよび１８ｂの
積層状態を示す図解的斜視図である。第７図は、
誘電体１２の断面図である。第８図は、可変コン
デンサ１の等価回路図である。第９図ないし第１
２図は、この考案の他の実施例を説明するための
もので、第９図は第５図に相当する図であり、第
１０図は第６図に相当する図であり、第１１図は
第７図に相当する図であり、第１２図は第８図に
相当する図である。第１３図は、この考案の比較
例としての可変コンデンサ１ａを示す、第１図に
相当する断面図である。第１４図は、第１３図に
示した可変コンデンサ１ａの等価回路図である。図において、１は可変コンデンサ、２はステー
タ、３はロータ、６は第１の外部端子、７は第２
の外部端子、１２は誘電体、１３は第１のステー
タ電極、１４は第２のステータ電極、１５，１６
は外部電極、１７，１８ａ，１８ｂは固定コンデ
ンサ用電極、２２は第１のロータ電極、２３は第
２のロータ電極、２７はロータ電極、２８は第１
のステータ電極、２９は第２のステータ電極、３
０，３１ａ，３１ｂは固定コンデンサ用電極であ
る。 FIG. 1 is a sectional view taken along the line - in FIG. 3, showing a variable capacitor 1 according to an embodiment of the invention. FIG. 2 is a sectional view taken along the line - in FIG. 3, also showing the variable capacitor 1. Third
The figure is a plan view of the variable capacitor 1. FIG. 4 is a bottom view of the variable capacitor 1. FIG. 5 shows the first and second stator electrodes 13 and 14.
FIG. 3 is an illustrative plan view showing a state where the rotor electrodes and the first and second rotor electrodes 22 and 23 are opposed to each other. FIG. 6 shows the first and second stator electrodes 13 and 14.
, is an illustrative perspective view showing a stacked state of the first fixed capacitor electrode 17 and the second fixed capacitor electrodes 18a and 18b. Figure 7 shows
3 is a cross-sectional view of the dielectric 12. FIG. FIG. 8 is an equivalent circuit diagram of the variable capacitor 1. Figures 9 to 1
Figure 2 is for explaining another embodiment of this invention, Figure 9 is a diagram corresponding to Figure 5, Figure 10 is a diagram corresponding to Figure 6, and Figure 11 is a diagram corresponding to Figure 6. is a diagram corresponding to FIG. 7, and FIG. 12 is a diagram corresponding to FIG. 8. FIG. 13 is a sectional view corresponding to FIG. 1, showing a variable capacitor 1a as a comparative example of this invention. FIG. 14 is an equivalent circuit diagram of the variable capacitor 1a shown in FIG. 13. In the figure, 1 is a variable capacitor, 2 is a stator, 3 is a rotor, 6 is a first external terminal, and 7 is a second external terminal.
external terminals, 12 is a dielectric, 13 is a first stator electrode, 14 is a second stator electrode, 15, 16
are external electrodes, 17, 18a, 18b are fixed capacitor electrodes, 22 is a first rotor electrode, 23 is a second rotor electrode, 27 is a rotor electrode, and 28 is a first rotor electrode.
29 is a second stator electrode, 3
0, 31a, and 31b are fixed capacitor electrodes.

Claims

[Claims for Utility Model Registration] (1) A stator comprising a stator electrode, and a rotor comprising a rotor electrode facing the stator electrode via a dielectric material and rotatably held relative to the stator. In the variable capacitor, the stator includes a dielectric, first and second stator electrodes separated from each other formed inside the dielectric, and electrically connected to each of the first and second stator electrodes. the rotor electrode commonly faces the first and second stator electrodes via a portion of the dielectric, and the dielectric A variable capacitor, further comprising a fixed capacitor electrode for forming a fixed capacitance taken out by the first and second external terminals. (2) The rotor electrode has first electrodes separated from each other.
and a second rotor electrode.
Variable capacitor described in. (3) The variable capacitor according to claim 1 or 2, wherein the fixed capacitor electrode includes a plurality of electrodes stacked so as to face each other inside the dielectric.