JPS6140049U - Branching circuit - Google Patents
Branching circuitInfo
- Publication number
- JPS6140049U JPS6140049U JP12428084U JP12428084U JPS6140049U JP S6140049 U JPS6140049 U JP S6140049U JP 12428084 U JP12428084 U JP 12428084U JP 12428084 U JP12428084 U JP 12428084U JP S6140049 U JPS6140049 U JP S6140049U
- Authority
- JP
- Japan
- Prior art keywords
- frequency signal
- high frequency
- control voltage
- band
- switch element
- 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
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
図は本考案の実施例を示す回路図である。
主要部分の符号の説明、１ＮＡ，ＩＮＡ１，■ＮＡ・・
・アンテナ接続端子、１・・・スイッチ回路、４・・・
トランス。The figure is a circuit diagram showing an embodiment of the present invention. Explanation of the symbols of the main parts, 1NA, INA1, ■NA...
・Antenna connection terminal, 1... switch circuit, 4...
Trance.
Claims (1)
選択する分波回路であって、１次及び２次コイルを有し
該１次コイルの一端が高周波信号の入力端子と交流的に
接続されたトランスと、前記１次コイルの他端と基準電
位との間に設けられた半導体スイッチ素子と、入力高周
波信号レベルに応じた制御電圧を発生する制御電圧発生
手段と、前記２つの異なる周波数帯域の高い方の帯域の
高周波信号の選択時に前記スイッチ素子をオンせしめる
第１バイアス電流を前記スイッチ素子に供給し低い方の
帯域の高周波信号の選択時に前記スイッチ素子が前記制
御電圧に応じたインピーダンスを得るように前記第１バ
イア又電流より小なる第２バイアス電流を前記スイッチ
素子に供給するバイアス供給手段とを含み、前記低い方
の周波数帯域の高周波信号を前記１次コイルの他端から
前記高い方の周波数帯域の高周波信号に対して高インピ
ーダンスとなるインダクタを介して得、前記高い方の周
波数帯域の高周波信号を前記２次コイルから得ることを
特徴とする分波回路。A branching circuit that selects a high-frequency signal from one of two different frequency bands, and has a primary coil and a secondary coil, and one end of the primary coil is connected in an alternating current manner to an input terminal for the high-frequency signal. a transformer, a semiconductor switching element provided between the other end of the primary coil and a reference potential, a control voltage generating means for generating a control voltage according to an input high frequency signal level, and a control voltage generating means for generating a control voltage corresponding to the input high frequency signal level; A first bias current is supplied to the switch element to turn on the switch element when a high frequency signal in a higher band is selected, and the switch element obtains an impedance according to the control voltage when a high frequency signal in a lower band is selected. bias supply means for supplying a second bias current smaller than the first bias current to the switch element, the high frequency signal in the lower frequency band is transmitted from the other end of the primary coil to the higher bias current. A branching circuit characterized in that the high frequency signal in the higher frequency band is obtained through an inductor having a high impedance with respect to the high frequency signal in the higher frequency band, and the high frequency signal in the higher frequency band is obtained from the secondary coil.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12428084U JPS6140049U (en) | 1984-08-14 | 1984-08-14 | Branching circuit |
| US06/753,458 US4656364A (en) | 1984-07-10 | 1985-07-10 | Antenna switching circuit for a diversity receiving system and branching circuit with a signal attenuation operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12428084U JPS6140049U (en) | 1984-08-14 | 1984-08-14 | Branching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6140049U true JPS6140049U (en) | 1986-03-13 |
Family
ID=30683007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12428084U Pending JPS6140049U (en) | 1984-07-10 | 1984-08-14 | Branching circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6140049U (en) |
-
1984
- 1984-08-14 JP JP12428084U patent/JPS6140049U/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6140049U (en) | Branching circuit | |
| JPS5924201Y2 (en) | power circuit | |
| JPH0223108Y2 (en) | ||
| JPS5963540U (en) | antenna matching device | |
| JPS60174342U (en) | local oscillation circuit | |
| JPS60160498U (en) | discharge lamp lighting device | |
| JPS5957049U (en) | High frequency connection circuit | |
| JPS6133398U (en) | High frequency discharge lamp lighting device | |
| JPS5967006U (en) | antenna switching device | |
| JPS58127709U (en) | Double tuned circuit | |
| JPS6076895U (en) | High frequency discharge lamp lighting device | |
| JPS59157341U (en) | wireless microphone | |
| JPS6032791U (en) | Safety device for high frequency oscillation circuit | |
| JPS58101499U (en) | High frequency discharge lamp lighting device | |
| JPS58111543U (en) | Transformer for balanced mixer circuit | |
| JPS59190096U (en) | High frequency induction heating device | |
| JPS59130349U (en) | High frequency signal switching circuit | |
| JPS5868738U (en) | Multiband antenna tuning circuit | |
| JPS59149727U (en) | high speed switching circuit | |
| JPH11215704A (en) | Power circuit and transformer | |
| JPS5835299U (en) | High frequency discharge lamp lighting device | |
| JPS6077127U (en) | semiconductor switch control device | |
| JPH04118890A (en) | High frequency heating device | |
| JPS596345U (en) | antenna tuning device | |
| JPS6076894U (en) | High frequency discharge lamp lighting device |