JPH02128436U - - Google Patents
Info
- Publication number
- JPH02128436U JPH02128436U JP1989037025U JP3702589U JPH02128436U JP H02128436 U JPH02128436 U JP H02128436U JP 1989037025 U JP1989037025 U JP 1989037025U JP 3702589 U JP3702589 U JP 3702589U JP H02128436 U JPH02128436 U JP H02128436U
- Authority
- JP
- Japan
- Prior art keywords
- pass filter
- input terminal
- series
- frequency output
- output terminal
- 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.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 9
Landscapes
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Description
第１図は本考案の一実施例の回路図、第２図は
第１図における高域通過フイルタ１と低域通過フ
イルタ２の減衰率特性図、第３図イは第１図にお
ける低域通過フイルタ２のＶＨＦ帯における等価
回路図、第３図ロは第１図における高域通過フイ
ルタ１のＵＨＦ帯における等価回路図、第４図は
従来の分波回路の回路図、第５図は第４図におけ
る高域通過フイルタ３と低域通過フイルタ２の減
衰率特性図、第６図イは第４図における低域通過
フイルタ２のＶＨＦ帯における等価回路図、第６
図ロは第４図における高域通過フイルタ３のＵＨ
Ｆ帯における等価回路図である。
１……高域通過フイルタ、２……低域通過フイ
ルタ、１０……入力端子、１１……低域出力端子
、１２……高域出力端子、１５……可変容量ダイ
オード（可変容量素子）。
FIG. 1 is a circuit diagram of an embodiment of the present invention, FIG. 2 is an attenuation rate characteristic diagram of high-pass filter 1 and low-pass filter 2 in FIG. 1, and FIG. Figure 3 (b) is an equivalent circuit diagram of the pass filter 2 in the VHF band, Figure 3 (b) is an equivalent circuit diagram of the high pass filter 1 in Figure 1 in the UHF band, Figure 4 is a circuit diagram of a conventional branching circuit, and Figure 5 is an equivalent circuit diagram of the pass filter 2 in the VHF band. Attenuation rate characteristic diagram of high-pass filter 3 and low-pass filter 2 in FIG. 4, FIG. 6A is an equivalent circuit diagram in the VHF band of low-pass filter 2 in FIG.
Figure B shows the UH of high-pass filter 3 in Figure 4.
It is an equivalent circuit diagram in F band. 1... High-pass filter, 2... Low-pass filter, 10... Input terminal, 11... Low-frequency output terminal, 12... High-frequency output terminal, 15... Variable capacitance diode (variable capacitance element).
Claims (1)
れ、外部から供給される制御信号によつて静電容
量値が変化する可変容量素子を前記入力端子側の
直列容量として具備する高域通過フイルタと、前
記入力端子と低域出力端子との間に直列に介装さ
れた低域通過フイルタとを具備することを特徴と
する分波回路。 A high-frequency band including a variable capacitance element that is interposed in series between an input terminal and a high-frequency output terminal and whose capacitance value changes according to a control signal supplied from the outside as a series capacitor on the input terminal side. A branching circuit comprising a pass filter and a low pass filter interposed in series between the input terminal and the low frequency output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989037025U JPH0713304Y2 (en) | 1989-03-30 | 1989-03-30 | Branching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989037025U JPH0713304Y2 (en) | 1989-03-30 | 1989-03-30 | Branching circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02128436U true JPH02128436U (en) | 1990-10-23 |
| JPH0713304Y2 JPH0713304Y2 (en) | 1995-03-29 |
Family
ID=31543770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989037025U Expired - Fee Related JPH0713304Y2 (en) | 1989-03-30 | 1989-03-30 | Branching circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0713304Y2 (en) |
-
1989
- 1989-03-30 JP JP1989037025U patent/JPH0713304Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0713304Y2 (en) | 1995-03-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |