JPS5819511U - Self-excited frequency conversion circuit - Google Patents
Self-excited frequency conversion circuitInfo
- Publication number
- JPS5819511U JPS5819511U JP11412281U JP11412281U JPS5819511U JP S5819511 U JPS5819511 U JP S5819511U JP 11412281 U JP11412281 U JP 11412281U JP 11412281 U JP11412281 U JP 11412281U JP S5819511 U JPS5819511 U JP S5819511U
- Authority
- JP
- Japan
- Prior art keywords
- self
- conversion circuit
- frequency conversion
- excited frequency
- excited
- 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
- 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ＦＭ用自励式周波数変換回路の一例の回
路図、第２図は本考案になる゛自励式周波数変換回路の
一実施例の回路図、第３図は上記自励周波数変換回路の
要部の一変形例の回路図である。
１・・・周波数変換回路、２・・・局部発振回路、３・
・・中間周波同調回路、Ｔｒ・・・トランジスタ、Ｌｌ
・・・コイル、Ｌ２・・・発振コイル、Ｌ３・・・コイ
ル、Ｃ□、Ｃ２゜Ｃ３，Ｃ４，Ｃ３，Ｃ６，Ｃ７，Ｃ８
，ＣＴ、 ＶＣ・・・コンデンサ、４・・・フェライト
ビーズコア。Figure 1 is a circuit diagram of an example of a conventional self-excited frequency conversion circuit for FM, Figure 2 is a circuit diagram of an embodiment of the self-excited frequency conversion circuit of the present invention, and Figure 3 is a circuit diagram of an example of the self-excited frequency conversion circuit of the present invention. FIG. 7 is a circuit diagram of a modified example of the main part of the circuit. 1... Frequency conversion circuit, 2... Local oscillation circuit, 3.
...Intermediate frequency tuning circuit, Tr...transistor, Ll
... Coil, L2 ... Oscillation coil, L3 ... Coil, C□, C2゜C3, C4, C3, C6, C7, C8
, CT, VC...capacitor, 4...ferrite bead core.
Claims (2)
路にリミッタダイオードが並列接続された自励式周波数
変換回路において、該リミッタダイオードに局部発振周
波数に対してはインピーダンスが大であり、中間周波数
に対してはインピーダンスが小であるインダクタンスを
直列接続してなる自励式周波数変換回路。(1) In a self-excited frequency conversion circuit in which a limiter diode is connected in parallel to an intermediate frequency tuning circuit connected to a part of the local oscillation circuit, the limiter diode has a large impedance with respect to the local oscillation frequency, and A self-excited frequency conversion circuit consisting of series-connected inductances with low impedance relative to the frequency.
構成したことを特徴とする実用新案登録請求の範囲第１
項記載の自励式周波数変換回路。(2) Utility model registration claim 1, characterized in that the inductance is composed of a ferrite bead core.
The self-excited frequency conversion circuit described in .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11412281U JPS5819511U (en) | 1981-07-31 | 1981-07-31 | Self-excited frequency conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11412281U JPS5819511U (en) | 1981-07-31 | 1981-07-31 | Self-excited frequency conversion circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5819511U true JPS5819511U (en) | 1983-02-07 |
| JPS6241443Y2 JPS6241443Y2 (en) | 1987-10-23 |
Family
ID=29908409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11412281U Granted JPS5819511U (en) | 1981-07-31 | 1981-07-31 | Self-excited frequency conversion circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5819511U (en) |
-
1981
- 1981-07-31 JP JP11412281U patent/JPS5819511U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6241443Y2 (en) | 1987-10-23 |
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