JPS59129242U - Local signal injection circuit - Google Patents
Local signal injection circuitInfo
- Publication number
- JPS59129242U JPS59129242U JP2271383U JP2271383U JPS59129242U JP S59129242 U JPS59129242 U JP S59129242U JP 2271383 U JP2271383 U JP 2271383U JP 2271383 U JP2271383 U JP 2271383U JP S59129242 U JPS59129242 U JP S59129242U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal injection
- tuning
- injection circuit
- local signal
- 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.)
- Granted
Links
Landscapes
- Noise Elimination (AREA)
- Superheterodyne Receivers (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図は従来の発振信号の注入回路、第２図は第１図の
注入回路における同調回路部の周波数特性、第３図は本
考案による発振信号の注入回路の実施例、第４図は第３
図の注入回路内の同調回路部の周波数特性である。
図中、１は水晶発振子、２は発振トランジスタ、３は同
調トランス、１０は第２の可変インダクタ、Ｃ’３は同
調用コンデンサ、４は周波数混合用トランジスタ、５は
高周波増幅用トランジスタ、６は第１の可変インタフタ
を夫々示す。FIG. 1 shows a conventional oscillation signal injection circuit, FIG. 2 shows the frequency characteristics of the tuned circuit section in the injection circuit of FIG. 1, FIG. 3 shows an embodiment of the oscillation signal injection circuit according to the present invention, and FIG. Third
This is the frequency characteristic of the tuning circuit section in the injection circuit shown in the figure. In the figure, 1 is a crystal oscillator, 2 is an oscillation transistor, 3 is a tuning transformer, 10 is a second variable inductor, C'3 is a tuning capacitor, 4 is a frequency mixing transistor, 5 is a high frequency amplification transistor, 6 indicate the first variable interface, respectively.
Claims (1)
数ｆ。の所定倍の周波数を有する信号を取出す同調回路
を備えた局発信号の注入回路において、前記同調回路を
構成する同調トランスが一次側を同調回路に構成されか
つ二次側をインダクタンスの小なる巻線で形成されると
共に、該巻線の一端に可変インダクタンスと同調用コン
デンサとを直列に接続して直列同調回路が構成されてな
り、前記同調トランスよりなる第１の同調回路と上記可
変インダクタンスを含む第２の同調回路とを臨界結合に
よって結合したことを特徴とする局発信号の注入回路。A crystal oscillator and an oscillation frequency f connected to the output side of the oscillator. In a local oscillator signal injection circuit that includes a tuning circuit that extracts a signal having a frequency that is a predetermined multiple of A series tuned circuit is formed by connecting a variable inductance and a tuning capacitor in series to one end of the winding, and a first tuning circuit consisting of the tuning transformer and the variable inductance are connected in series to one end of the winding. 1. A local oscillator signal injection circuit, characterized in that the local oscillator signal injection circuit is coupled to a second tuning circuit including the second tuning circuit through critical coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2271383U JPS59129242U (en) | 1983-02-18 | 1983-02-18 | Local signal injection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2271383U JPS59129242U (en) | 1983-02-18 | 1983-02-18 | Local signal injection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59129242U true JPS59129242U (en) | 1984-08-30 |
| JPS6345082Y2 JPS6345082Y2 (en) | 1988-11-22 |
Family
ID=30153806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2271383U Granted JPS59129242U (en) | 1983-02-18 | 1983-02-18 | Local signal injection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59129242U (en) |
-
1983
- 1983-02-18 JP JP2271383U patent/JPS59129242U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6345082Y2 (en) | 1988-11-22 |
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