JPH02150818U - - Google Patents
Info
- Publication number
- JPH02150818U JPH02150818U JP5922089U JP5922089U JPH02150818U JP H02150818 U JPH02150818 U JP H02150818U JP 5922089 U JP5922089 U JP 5922089U JP 5922089 U JP5922089 U JP 5922089U JP H02150818 U JPH02150818 U JP H02150818U
- Authority
- JP
- Japan
- Prior art keywords
- oscillator
- oscillation
- grounded
- field effect
- effect transistor
- 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 4
- 230000005669 field effect Effects 0.000 claims 3
- 239000003990 capacitor Substances 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Description
第1図はこの考案の実施例を示す回路図、第2
図は第1図の実施例の周波数切り替えモードに対
する制御信号レベルの対応を示す図、第3図は従
来の周波数切り替え機能付発振器の回路図、第4
図は第3図の発振器の周波数切り替えモードに対
する制御信号レベルの対応を示す図である。
Figure 1 is a circuit diagram showing an embodiment of this invention, Figure 2 is a circuit diagram showing an embodiment of this invention.
The figures show the correspondence of the control signal level to the frequency switching mode of the embodiment shown in Fig. 1, Fig. 3 is a circuit diagram of a conventional oscillator with frequency switching function, and Fig. 4
The figure is a diagram showing the correspondence of the control signal level to the frequency switching mode of the oscillator in FIG. 3.
Claims (1)
用コンデンサと、バイポーラトランジスタと、電
界効果トランジスタとを有する発振器において、 上記発振用共振回路は、その一端が上記発振器
本体に接続されると共に上記周波数調整用コンデ
ンサ及び上記バイポーラトランジスタのコレクタ
、エミツタ間を順次通じて接地され、一方上記発
振用共振回路の他端は接地され、 上記バイポーラトランジスタのベースは、第1
抵抗器を通じて接地されると共に第2抵抗器及び
上記電界効果トランジスタのドレイン、ソース間
を順次通じて直流電源端子に接続され、 上記電界効果トランジスタのゲートに供給する
制御電圧がオン、オフされて、発振周波数が切り
替えられることを特徴とする、 周波数切り替え機能付発振器。[Claims for Utility Model Registration] In an oscillator having an oscillator body, an oscillation resonance circuit, a frequency adjustment capacitor, a bipolar transistor, and a field effect transistor, one end of the oscillation resonance circuit is connected to the oscillator body. and is grounded through the frequency adjustment capacitor and the collector and emitter of the bipolar transistor in sequence, while the other end of the oscillation resonant circuit is grounded, and the base of the bipolar transistor is connected to the first
grounded through a resistor, and connected to a DC power supply terminal through a second resistor and the drain and source of the field effect transistor in order, and a control voltage supplied to the gate of the field effect transistor is turned on and off; An oscillator with a frequency switching function, characterized in that the oscillation frequency can be switched.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5922089U JPH02150818U (en) | 1989-05-22 | 1989-05-22 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5922089U JPH02150818U (en) | 1989-05-22 | 1989-05-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02150818U true JPH02150818U (en) | 1990-12-27 |
Family
ID=31585526
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5922089U Pending JPH02150818U (en) | 1989-05-22 | 1989-05-22 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02150818U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007208538A (en) * | 2006-01-31 | 2007-08-16 | Fujitsu Ltd | Resonator type oscillator and tuning capacitor circuit |
-
1989
- 1989-05-22 JP JP5922089U patent/JPH02150818U/ja active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007208538A (en) * | 2006-01-31 | 2007-08-16 | Fujitsu Ltd | Resonator type oscillator and tuning capacitor circuit |
JP4676894B2 (en) * | 2006-01-31 | 2011-04-27 | 富士通株式会社 | Resonator type oscillator and tuning capacitor circuit |