JPH01146615U - - Google Patents
Info
- Publication number
- JPH01146615U JPH01146615U JP4247788U JP4247788U JPH01146615U JP H01146615 U JPH01146615 U JP H01146615U JP 4247788 U JP4247788 U JP 4247788U JP 4247788 U JP4247788 U JP 4247788U JP H01146615 U JPH01146615 U JP H01146615U
- Authority
- JP
- Japan
- Prior art keywords
- emitter
- base
- ground
- capacitor
- 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 description 7
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Description
第１図は本考案の第１の実施例になる発振回路
の回路図、第２図は本考案の第２の実施例になる
発振回路の要部回路図、第３図は従来の発振回路
の回路図を夫々示す。
Ｑ……トランジスタ、Ｄ１……発振周波数可変
用可変容量ダイオード、Ｄ２……ＡＦＣ用可変容
量ダイオード、Ｄ３〜Ｄ５，Ｄ７，Ｄ８……可変
容量ダイオード、Ｄ６……スイツチングダイオー
ド、Ｌ１，Ｌ２……コイル、Ｃ１〜Ｃ１５……コ
ンデンサ。
Fig. 1 is a circuit diagram of an oscillation circuit according to a first embodiment of the present invention, Fig. 2 is a circuit diagram of main parts of an oscillation circuit according to a second embodiment of the present invention, and Fig. 3 is a conventional oscillation circuit. The circuit diagrams are shown respectively. Q...transistor, D1 ...variable capacitance diode for variable oscillation frequency, D2 ...variable capacitance diode for AFC, D3 to D5 , D7 , D8 ...variable capacitance diode, D6 ...switching Diode, L 1 , L 2 ... Coil, C 1 - C 15 ... Capacitor.
Claims (1)
ベース・エミツタ間及びエミツタ・アース間に夫
々コンデンサ、ベース・アース間に発振周波数可
変用のコンデンサ、が夫々接続された発振回路に
おいて、 該トランジスタのエミツタ・アース間、又はエ
ミツタ・ベース間のいずれか一方にＡＦＣ電圧に
基づいて可変される可変容量を接続した構成の発
振回路。[Scope of claim for utility model registration] A coil between the base and collector of a transistor,
In an oscillation circuit in which a capacitor is connected between the base and emitter and between the emitter and ground, and a capacitor for varying the oscillation frequency is connected between the base and ground, either between the emitter and ground or between the emitter and base of the transistor. An oscillation circuit with a configuration in which a variable capacitor that is varied based on the AFC voltage is connected to one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4247788U JPH01146615U (en) | 1988-03-30 | 1988-03-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4247788U JPH01146615U (en) | 1988-03-30 | 1988-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01146615U true JPH01146615U (en) | 1989-10-09 |
Family
ID=31268886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4247788U Pending JPH01146615U (en) | 1988-03-30 | 1988-03-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01146615U (en) |
-
1988
- 1988-03-30 JP JP4247788U patent/JPH01146615U/ja active Pending