JPS635721U - - Google Patents
Info
- Publication number
- JPS635721U JPS635721U JP9942186U JP9942186U JPS635721U JP S635721 U JPS635721 U JP S635721U JP 9942186 U JP9942186 U JP 9942186U JP 9942186 U JP9942186 U JP 9942186U JP S635721 U JPS635721 U JP S635721U
- Authority
- JP
- Japan
- Prior art keywords
- pass filter
- low
- variable
- inductance
- series
- 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
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- Filters And Equalizers (AREA)
Description
第１図はこの考案に係る可変ローパスフイルタ
の一実施例を示す回路構成図、第２図は上記実施
例の効果を示す実測図、第３図は従来の可変ロー
パスフイルタの構成を示す回路図である。
１１……入力端子、１２……出力端子、１３…
…アース、１４……制御電圧入力端子、Ｌ１〜Ｌ
３……インダクタ、Ｃ１〜Ｃ５……コンデンサ、
Ｄ１，Ｄ２……可変容量ダイオード、Ｓ１，Ｓ２
……スタブ。
Fig. 1 is a circuit configuration diagram showing an embodiment of the variable low-pass filter according to this invention, Fig. 2 is an actual measurement diagram showing the effect of the above embodiment, and Fig. 3 is a circuit diagram showing the configuration of a conventional variable low-pass filter. It is. 11...Input terminal, 12...Output terminal, 13...
...Earth, 14...Control voltage input terminal, L1-L
3...Inductor, C1-C5...Capacitor,
D1, D2...Variable capacitance diode, S1, S2
……stub.
Claims (1)
タンス素子を含むインダクタンス回路と、このイ
ンダクタンス回路と並列接続される容量素子を含
む容量回路とをそれぞれ少なくとも１つ以上備え
、両者を交互に配列したローパスフイルタにおい
て、前記容量素子の１つ以上に第１の可変容量ダ
イオードを用い、前記ローパスフイルタの入出力
端にそれぞれ他端が開放されたスタブを接続し、
前記スタブの少なくとも一方に直列に第２の可変
容量ダイオードを接続するようにしたことを特徴
とする可変ローパスフイルタ。 A low-pass filter comprising at least one inductance circuit including an inductance element connected in series between an input terminal and an output terminal, and at least one capacitance circuit including a capacitance element connected in parallel with the inductance circuit, the two being arranged alternately. a first variable capacitance diode is used as one or more of the capacitive elements, and a stub with the other end open is connected to the input and output terminals of the low-pass filter, respectively;
A variable low-pass filter characterized in that a second variable capacitance diode is connected in series to at least one of the stubs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9942186U JPS635721U (en) | 1986-06-28 | 1986-06-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9942186U JPS635721U (en) | 1986-06-28 | 1986-06-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS635721U true JPS635721U (en) | 1988-01-14 |
Family
ID=30968282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9942186U Pending JPS635721U (en) | 1986-06-28 | 1986-06-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS635721U (en) |
-
1986
- 1986-06-28 JP JP9942186U patent/JPS635721U/ja active Pending
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