JPH0288324U - - Google Patents
Info
- Publication number
- JPH0288324U JPH0288324U JP16725888U JP16725888U JPH0288324U JP H0288324 U JPH0288324 U JP H0288324U JP 16725888 U JP16725888 U JP 16725888U JP 16725888 U JP16725888 U JP 16725888U JP H0288324 U JPH0288324 U JP H0288324U
- Authority
- JP
- Japan
- Prior art keywords
- switching
- switching diode
- diode
- bandpass filter
- anode
- 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
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Electronic Switches (AREA)
- Networks Using Active Elements (AREA)
Description
第１図は本考案の一実施例の帯域フイルタ切換
回路を示す回路図、第２図は従来の帯域フイルタ
切換回路を示す回路図、第３図は第２図の回路を
スイツチング制御する論理回路を示す回路図であ
る。
３１…入力端子、３２…出力端子、３４，３５
，３６…帯域フイルタ、３７，３８…スイツチン
グ端子、３９…電源端子、Ｑ１，Ｑ２…スイツチ
ング用トランジスタ、Ｄ１１，Ｄ１２，Ｄ１３…
スイツチング用ダイオード、Ｒ１１…バイアス用
抵抗、Ｒ１６，Ｒ１７…分割用抵抗。
Fig. 1 is a circuit diagram showing a band filter switching circuit according to an embodiment of the present invention, Fig. 2 is a circuit diagram showing a conventional band filter switching circuit, and Fig. 3 is a logic circuit for controlling switching of the circuit shown in Fig. 2. FIG. 31...Input terminal, 32...Output terminal, 34, 35
, 36... Band filter, 37, 38... Switching terminal, 39... Power supply terminal, Q1, Q2... Switching transistor, D11, D12, D13...
Switching diode, R11...bias resistance, R16, R17...dividing resistance.
Claims (1)
１、第２の２つのスイツチング用ダイオードと、 これらのスイツチング用ダイオードの共通接続
点と基準電位点間に接続した共通のバイアス用抵
抗と、 前記第１のスイツチング用ダイオードのアノー
ドに接続し、外部からの制御信号にて前記第１の
スイツチング用ダイオードを導通又は非導通に切
り換えるスイツチング制御回路と、 前記第２のスイツチング用ダイオードのアノー
ドに対して、前記第１のスイツチング用ダイオー
ドが導通した場合にカソードに発生する電圧とほ
ぼ同じかそれよりも低い電圧を、常時印加する手
段と、 前記第１のスイツチング用ダイオードの後段に
配置した第１の帯域フイルタと、 前記第２のスイツチング用ダイオードの後段に
配置され、前記第１の帯域フイルタよりも通過損
失の少ない第２の帯域フイルタと を具備したことを特徴とする帯域フイルタ切換回
路。[Claims for Utility Model Registration] An input terminal to which a signal is supplied, two switching diodes, first and second, whose cathodes are commonly connected to this input terminal, and a common connection point of these switching diodes. and a common bias resistor connected between and a reference potential point, and a switching device connected to the anode of the first switching diode and switching the first switching diode into conduction or non-conduction based on an external control signal. a control circuit; and means for constantly applying to the anode of the second switching diode a voltage that is substantially the same as or lower than the voltage generated at the cathode when the first switching diode is conductive; , a first bandpass filter placed after the first switching diode, and a second bandpass filter placed after the second switching diode and having a lower passing loss than the first bandpass filter. A band filter switching circuit characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16725888U JPH0648988Y2 (en) | 1988-12-23 | 1988-12-23 | Band filter switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16725888U JPH0648988Y2 (en) | 1988-12-23 | 1988-12-23 | Band filter switching circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0288324U true JPH0288324U (en) | 1990-07-12 |
| JPH0648988Y2 JPH0648988Y2 (en) | 1994-12-12 |
Family
ID=31455387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16725888U Expired - Lifetime JPH0648988Y2 (en) | 1988-12-23 | 1988-12-23 | Band filter switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0648988Y2 (en) |
-
1988
- 1988-12-23 JP JP16725888U patent/JPH0648988Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0648988Y2 (en) | 1994-12-12 |
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