JPS6286728U - - Google Patents
Info
- Publication number
- JPS6286728U JPS6286728U JP17966085U JP17966085U JPS6286728U JP S6286728 U JPS6286728 U JP S6286728U JP 17966085 U JP17966085 U JP 17966085U JP 17966085 U JP17966085 U JP 17966085U JP S6286728 U JPS6286728 U JP S6286728U
- Authority
- JP
- Japan
- Prior art keywords
- resonance frequency
- inductance
- change
- tuning circuit
- value
- 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
- 238000010586 diagram Methods 0.000 description 4
Description
第１図は本考案の一実施例を示し、コイルの切
換えを二段階とした場合の回路図、第２図はコイ
ルの切換えを多段階とした場合の回路図、第３図
は従来の電子同調回路の回路図である。
１……マイクロプロセツサ、２……ローパスフ
イルタ、ＶＤ……可変容量ダイオード、Ｌ１……
第１コイル、Ｌ２……第２コイル、ＳＤ……Ｌ値
切換用スイツチングダイオード。
Figure 1 shows an embodiment of the present invention; Figure 2 is a circuit diagram of a two-stage coil switching system; Figure 2 is a circuit diagram of a multi-stage coil switching system; and Figure 3 is a circuit diagram of a conventional electronic circuit. FIG. 3 is a circuit diagram of a tuning circuit. 1...Microprocessor, 2...Low pass filter, VD...Variable capacitance diode, L1 ...
1st coil, L 2 ...Second coil, SD...Switching diode for L value switching.
Claims (1)
圧によつて容量値の変化する可変容量素子とイン
ダクタンス値を複数段階に切換可能で前記可変容
量素子の容量変化による共振周波数の変化を補充
して共振周波数を変化させるインダクタンス素子
とからなり、該インダクタンス素子のインダクタ
ンス値が同調しようとする共振周波数範囲に応じ
て切換えられることを特徴とする電子同調回路。 A resonant circuit constituting the tuning circuit includes a variable capacitance element whose capacitance value changes depending on the applied voltage, and an inductance value that can be switched in multiple stages to compensate for the change in resonance frequency caused by the capacitance change of the variable capacitance element. 1. An electronic tuning circuit comprising an inductance element that changes a resonance frequency, the inductance value of the inductance element being switched according to the resonance frequency range to be tuned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17966085U JPS6286728U (en) | 1985-11-20 | 1985-11-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17966085U JPS6286728U (en) | 1985-11-20 | 1985-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6286728U true JPS6286728U (en) | 1987-06-03 |
Family
ID=31122911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17966085U Pending JPS6286728U (en) | 1985-11-20 | 1985-11-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6286728U (en) |
-
1985
- 1985-11-20 JP JP17966085U patent/JPS6286728U/ja active Pending
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