JPH01100524U - - Google Patents
Info
- Publication number
- JPH01100524U JPH01100524U JP19470687U JP19470687U JPH01100524U JP H01100524 U JPH01100524 U JP H01100524U JP 19470687 U JP19470687 U JP 19470687U JP 19470687 U JP19470687 U JP 19470687U JP H01100524 U JPH01100524 U JP H01100524U
- Authority
- JP
- Japan
- Prior art keywords
- coil
- resistor
- resonant circuit
- grounding
- another
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Filters And Equalizers (AREA)
Description
第１図は本考案のノツチフイルタの実施例を示
す回路図、第２図と第３図は夫々第１図の半導体
スイツチ部分を具体的に示す回路図、第４図は第
１図のノツチフイルタの特性図、第５図は本考案
のノツチフイルタの他の実施例を示す回路図、第
６図はさらに別の実施例を示す回路図、第７図は
第５図のノツチフイルタの特性図、第８図は従来
のノツチフイルタの回路図である。
１：入力端、２：出力端、３：タツプ、４，６
：半導体スイツチ。
FIG. 1 is a circuit diagram showing an embodiment of the notch filter of the present invention, FIGS. 2 and 3 are circuit diagrams specifically showing the semiconductor switch portion of FIG. 1, and FIG. 4 is a circuit diagram of the notch filter of FIG. 1. FIG. 5 is a circuit diagram showing another embodiment of the notch filter of the present invention, FIG. 6 is a circuit diagram showing yet another embodiment, FIG. 7 is a characteristic diagram of the notch filter of FIG. 5, and FIG. The figure is a circuit diagram of a conventional notch filter. 1: Input end, 2: Output end, 3: Tap, 4, 6
: Semiconductor switch.
Claims (1)
ツプを抵抗を介して接地し、そのコイルに別のコ
イルとコンデンサからなるＬＣ共振回路を誘導結
合してあり、該ＬＣ共振回路の１ケ所を直接接地
し、別の１ケ所を少なくとも半導体スイツチを介
して接地することによりその共振周波数を変化で
きることを特徴とするノツチフイルタ。 The tap of a coil with one end as an input end and the other end as an output end is grounded via a resistor, and an LC resonant circuit consisting of another coil and a capacitor is inductively coupled to the coil, and one point of the LC resonant circuit is connected to the ground through a resistor. A notch filter characterized in that its resonant frequency can be changed by directly grounding the filter and grounding it at another point via at least a semiconductor switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19470687U JPH01100524U (en) | 1987-12-22 | 1987-12-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19470687U JPH01100524U (en) | 1987-12-22 | 1987-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01100524U true JPH01100524U (en) | 1989-07-06 |
Family
ID=31485424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19470687U Pending JPH01100524U (en) | 1987-12-22 | 1987-12-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01100524U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018509798A (en) * | 2015-01-21 | 2018-04-05 | クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ | Integrated filter in output matching element |
-
1987
- 1987-12-22 JP JP19470687U patent/JPH01100524U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018509798A (en) * | 2015-01-21 | 2018-04-05 | クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ | Integrated filter in output matching element |