JPS6423111U - - Google Patents
Info
- Publication number
- JPS6423111U JPS6423111U JP11686687U JP11686687U JPS6423111U JP S6423111 U JPS6423111 U JP S6423111U JP 11686687 U JP11686687 U JP 11686687U JP 11686687 U JP11686687 U JP 11686687U JP S6423111 U JPS6423111 U JP S6423111U
- Authority
- JP
- Japan
- Prior art keywords
- oscillation
- variable capacitance
- transistor
- bands
- oscillates
- 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 10
- 238000010586 diagram Methods 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Description
第１図は本考案の一実施例になる発振回路の回
路図、第２図及び第３図は本考案の実施例を説明
する為のもので、第２図は発振回路の同調電圧対
発振周波数の特性図、第３図は可変容量ダイオー
ドの同調電圧対可変容量の特性図、第４図は一般
的なオールバンドチユーナ（アツプ・ダウン方式
）の回路ブロツク図、第５図は従来例になる発振
回路の回路図を夫々示す。
４……可変発振器、５……増巾器、１２……Ｆ
Ｍ切換回路、１３……端子、ＶＴ……同調電圧供
給端子、Ｖｃｃ……電源端子、Ｖｏｕｔ……発振
信号出力端子（増巾器出力端子）、Ｑ１……発振
用トランジスタ、Ｄ１，Ｄ２……可変容量ダイオ
ード、Ｄ３……スイツチング用ダイオード、Ｌ１
，Ｌ２，Ｌ３……インダクタ、Ｃ１〜Ｃ５……コ
ンデンサ、Ｒ１〜Ｒ６……抵抗。
Figure 1 is a circuit diagram of an oscillation circuit that is an embodiment of the present invention, Figures 2 and 3 are for explaining the embodiment of the present invention, and Figure 2 is a diagram of the oscillation circuit's tuning voltage versus oscillation. Frequency characteristic diagram, Figure 3 is a characteristic diagram of tuning voltage versus variable capacitance of a variable capacitance diode, Figure 4 is a circuit block diagram of a general all-band tuner (up-down method), and Figure 5 is a conventional example. The circuit diagrams of the oscillation circuits shown below are shown. 4...Variable oscillator, 5...Amplifier, 12...F
M switching circuit, 13...terminal, VT...tuning voltage supply terminal, Vcc...power supply terminal, Vout...oscillation signal output terminal (amplifier output terminal), Q1 ...oscillation transistor, D1 , D 2 ... Variable capacitance diode, D 3 ... Switching diode, L 1
, L2 , L3 ...inductor, C1 - C5 ...capacitor, R1 - R6 ...resistance.
Claims (1)
つて発振する様にされたクラツプ型の発振回路に
おいて、 発振トランジスタのベース、エミツタ間に発振
周波数可変用の第１及び第２の可変容量ダイオー
ドとインダクタとが直列接続され、 該複数の帯域の最下位周波数の帯域の発振時に
該第１及び第２のいずれか一方の可変容量ダイオ
ードが交流的にシヨートされる様にされた構成の
発振回路。[Claims for Utility Model Registration] In a clap-type oscillation circuit that oscillates over a plurality of bands having a predetermined bandwidth, a transistor for varying the oscillation frequency is provided between the base and emitter of the oscillation transistor. The first and second variable capacitance diodes and the inductor are connected in series, and when the lowest frequency band of the plurality of bands oscillates, one of the first and second variable capacitance diodes is AC-shot. An oscillation circuit with a similar configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11686687U JPS6423111U (en) | 1987-07-30 | 1987-07-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11686687U JPS6423111U (en) | 1987-07-30 | 1987-07-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6423111U true JPS6423111U (en) | 1989-02-07 |
Family
ID=31359795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11686687U Pending JPS6423111U (en) | 1987-07-30 | 1987-07-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6423111U (en) |
-
1987
- 1987-07-30 JP JP11686687U patent/JPS6423111U/ja active Pending
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