JPS6190337U - - Google Patents
Info
- Publication number
- JPS6190337U JPS6190337U JP17509084U JP17509084U JPS6190337U JP S6190337 U JPS6190337 U JP S6190337U JP 17509084 U JP17509084 U JP 17509084U JP 17509084 U JP17509084 U JP 17509084U JP S6190337 U JPS6190337 U JP S6190337U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- oscillation
- coupling
- tank
- output
- 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 8
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Superheterodyne Receivers (AREA)
Description
第１図は本考案に係るチユーナの局部発振回路
の回路図、第２図はテレビジヨン受像機に使用さ
れるＶＨＦチユーナのブロツク図、第３図は従来
のチユーナの局部発振回路の回路図である。
１…局部発振用トランジスタ、２，４，５，６
，８，１３，１６，１８，２１…コンデンサ、３
，１１，１５，１９…抵抗、７…コイル、９…可
変容量ダイオード、１２…結合コイル、１４…増
幅用トランジスタ、１７…混合回路、２２…プリ
スケーラ。
Fig. 1 is a circuit diagram of a local oscillation circuit of a tuner according to the present invention, Fig. 2 is a block diagram of a VHF tuner used in a television receiver, and Fig. 3 is a circuit diagram of a local oscillation circuit of a conventional tuner. be. 1...Local oscillation transistor, 2, 4, 5, 6
, 8, 13, 16, 18, 21... Capacitor, 3
, 11, 15, 19...resistor, 7...coil, 9...variable capacitance diode, 12...coupling coil, 14...amplifying transistor, 17...mixing circuit, 22...prescaler.
Claims (1)
トランジスタで構成される発振回路と、前記タン
ク回路のコイルと相互誘導的に結合される結合回
路と、この結合回路を通して取り出された発振出
力を増幅して出力する増幅回路とを具備し、この
増幅回路より混合回路用及び選局回路用の発振出
力を取り出すようにしたことを特徴とするチユー
ナの局部発振回路。 An oscillation circuit consisting of a tank circuit including a variable capacitance diode and an oscillation transistor, a coupling circuit that is mutually inductively coupled to the coil of the tank circuit, and an oscillation output taken out through this coupling circuit, which is amplified and output. 1. A local oscillation circuit for a tuner, comprising: an amplifier circuit for extracting oscillation outputs for a mixing circuit and a tuning circuit from the amplifier circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17509084U JPS6190337U (en) | 1984-11-20 | 1984-11-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17509084U JPS6190337U (en) | 1984-11-20 | 1984-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6190337U true JPS6190337U (en) | 1986-06-12 |
Family
ID=30732694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17509084U Pending JPS6190337U (en) | 1984-11-20 | 1984-11-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6190337U (en) |
-
1984
- 1984-11-20 JP JP17509084U patent/JPS6190337U/ja active Pending