JPS59152843U - local oscillation circuit - Google Patents
local oscillation circuitInfo
- Publication number
- JPS59152843U JPS59152843U JP4566883U JP4566883U JPS59152843U JP S59152843 U JPS59152843 U JP S59152843U JP 4566883 U JP4566883 U JP 4566883U JP 4566883 U JP4566883 U JP 4566883U JP S59152843 U JPS59152843 U JP S59152843U
- Authority
- JP
- Japan
- Prior art keywords
- oscillation circuit
- local oscillation
- circuit
- tuning
- resonance
- 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
Landscapes
- Superheterodyne Receivers (AREA)
- Noise Elimination (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は周波数シンセサイザの回路系統を示す系統図、
第２図はプリスケーラとチューナを接続する場合の従来
の構成を示す回路図、第３図は本考案にかかる局部発振
回路を示す回路図、第４図は第２図に対応する本考案を
利用した場合のプリスケーラとチューナを接続する構成
を示す回路図、第５図は第４図を詳細に示す回路図であ
る。
１９・・・発振回路、２０・・・同調回路、２１・・・
トランジスタ、２８． ４８． ＶＤｓ、 ＶＤ２・・
・可変容量ダイオード、２９，３２，３７，４２，４３
．Ｃ２゜Ｃ２・・・コンデンサ、３０．３１．４０，４
１．Ｌｌ。
Ｌ２・・・インダクタンス（又はインダクタ）、３３゜
３６．４９・・・ダイオード、４５・・・出力端子。Figure 1 is a system diagram showing the circuit system of a frequency synthesizer.
Figure 2 is a circuit diagram showing a conventional configuration when connecting a prescaler and tuner, Figure 3 is a circuit diagram showing a local oscillation circuit according to the present invention, and Figure 4 is a circuit diagram using the present invention corresponding to Figure 2. FIG. 5 is a circuit diagram showing the configuration of connecting the prescaler and tuner in this case. FIG. 5 is a circuit diagram showing FIG. 4 in detail. 19... Oscillation circuit, 20... Tuning circuit, 21...
transistor, 28. 48. VDs, VD2...
・Variable capacitance diode, 29, 32, 37, 42, 43
．． C2゜C2...Capacitor, 30.31.40,4
1. Ll. L2...Inductance (or inductor), 33°36.49...Diode, 45...Output terminal.
Claims (1)
け、この同調回路の同調周波数と前記共振部の共振周波
数とが略同−になるように設定したことを特徴とする局
部発振回路。- A local oscillation circuit, characterized in that a tuning circuit for electromagnetic induction coupling is provided in a resonance section of an oscillation circuit, and the tuning frequency of the tuning circuit and the resonance frequency of the resonance section are set to be substantially the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4566883U JPS59152843U (en) | 1983-03-31 | 1983-03-31 | local oscillation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4566883U JPS59152843U (en) | 1983-03-31 | 1983-03-31 | local oscillation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59152843U true JPS59152843U (en) | 1984-10-13 |
Family
ID=30176194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4566883U Pending JPS59152843U (en) | 1983-03-31 | 1983-03-31 | local oscillation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59152843U (en) |
-
1983
- 1983-03-31 JP JP4566883U patent/JPS59152843U/en active Pending
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