JPH0365310U - - Google Patents
Info
- Publication number
- JPH0365310U JPH0365310U JP1989126731U JP12673189U JPH0365310U JP H0365310 U JPH0365310 U JP H0365310U JP 1989126731 U JP1989126731 U JP 1989126731U JP 12673189 U JP12673189 U JP 12673189U JP H0365310 U JPH0365310 U JP H0365310U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- level shift
- shift circuit
- transistor
- oscillation
- 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
- 230000010355 oscillation Effects 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Description
第１図は本考案の一実施例に係る高周波発振回
路の回路図、第２図は従来の高周波発振回路の回
路図である。
３……バンド選択用電圧の印加端子、４……直
流電源の印加端子、５……レギユレータ回路、６
……レベルシフト回路、７……バンド切換回路、
８，９……定電流電源、Ｑ１，Ｑ２……一対の発
振用トランジスタ、Ｑ３，Ｑ４……別の一対の発
振バツフア用トランジスタ、Ｑ５……バンド切換
用スイツチングトランジスタ、Ｑ６……レベルシ
フト回路の初段のバイアス用トランジスタ、Ｂｖ
……ＶＨＦバド選択用電圧、Ｖｃｃ……直流電源
、ＶＣＥ……コレクタ−エミツタ間電圧。
FIG. 1 is a circuit diagram of a high frequency oscillation circuit according to an embodiment of the present invention, and FIG. 2 is a circuit diagram of a conventional high frequency oscillation circuit. 3... Band selection voltage application terminal, 4... DC power supply application terminal, 5... Regulator circuit, 6
...Level shift circuit, 7...Band switching circuit,
8, 9...constant current power supply, Q1 , Q2 ...a pair of oscillation transistors, Q3 , Q4 ...another pair of oscillation buffer transistors, Q5 ...band switching transistor, Q 6 ...The first stage bias transistor of the level shift circuit, Bv
...VHF band selection voltage, Vcc ...DC power supply, VCE...Collector-emitter voltage.
Claims (1)
直流電源を適正な発振のための電圧にレベルシフ
トするレベルシフト回路と、 コレクタが直流電源の印加端子に接続されベー
スがＶＨＦまたはＵＨＦのバンド選択用電圧の印
加端子に接続されたバンド切換用スイツチングト
ランジスタと、 一方のコレクタが前記バンド選択用電圧の印加
端子に接続され他方のコレクタが前記バンド切換
用スイツチングトランジスタのエミツタに接続さ
れ各ベースが前記レベルシフト回路の出力端子に
接続されエミツタどうしが互いに接続されて定電
流電源に導かれ差動型に構成された一対の発振用
トランジスタと、 各コレクタがレギユレータ回路の電源出力端子
に接続され各ベースが前記レベルシフト回路の出
力端子に接続されエミツタどうしが互いに接続さ
れて前記とは別の定電流電源に導かれ差動型に構
成された前記とは別の一対の発振バツフア用トラ
ンジスタと、 前記バンド切換用スイツチングトランジスタの
エミツタの出力を受けて前記各定電流電源をアク
テイブにするバンド切換回路とを備えた高周波発
振回路において、 前記バンド切換回路の出力によつて前記レベル
シフト回路における初段のバイアス用トランジス
タを導通させるとともに、 バンド切換回路の出力停止に伴う前記初段のバ
イアス用トランジスタの非導通によつてレベルシ
フト回路の出力電圧を上昇させるように構成して
あることを特徴とする高周波発振回路。[Claims for Utility Model Registration] A level shift circuit that level-shifts a DC power supply to a voltage for proper oscillation by conduction of a bias transistor in the first stage; or a band switching transistor connected to the UHF band selection voltage application terminal; one collector connected to the band selection voltage application terminal and the other collector connected to the emitter of the band switching transistor; A pair of oscillation transistors are connected to the output terminal of the level shift circuit, each base is connected to the output terminal of the level shift circuit, the emitters are connected to each other, and the transistors are configured as a differential type and guided to a constant current power supply, and each collector is connected to the power supply of the regulator circuit. A pair of transistors connected to the output terminal, each base connected to the output terminal of the level shift circuit, emitters connected to each other, guided to a constant current power source different from the above, and configured in a differential type. A high frequency oscillation circuit comprising an oscillation buffer transistor and a band switching circuit that activates each of the constant current power supplies in response to an output from an emitter of the band switching switching transistor, The first stage bias transistor in the level shift circuit is made conductive, and the first stage bias transistor is made non-conductive when the output of the band switching circuit is stopped, thereby increasing the output voltage of the level shift circuit. A high frequency oscillation circuit characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989126731U JPH0365310U (en) | 1989-10-30 | 1989-10-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989126731U JPH0365310U (en) | 1989-10-30 | 1989-10-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0365310U true JPH0365310U (en) | 1991-06-25 |
Family
ID=31674526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989126731U Pending JPH0365310U (en) | 1989-10-30 | 1989-10-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0365310U (en) |
-
1989
- 1989-10-30 JP JP1989126731U patent/JPH0365310U/ja active Pending
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