JPH0397244U - - Google Patents
Info
- Publication number
- JPH0397244U JPH0397244U JP1990005497U JP549790U JPH0397244U JP H0397244 U JPH0397244 U JP H0397244U JP 1990005497 U JP1990005497 U JP 1990005497U JP 549790 U JP549790 U JP 549790U JP H0397244 U JPH0397244 U JP H0397244U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- local oscillation
- oscillation
- capacitor
- inductor
- 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 20
- 239000003990 capacitor Substances 0.000 claims description 7
- 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
Landscapes
- Superheterodyne Receivers (AREA)
Description
第１図は本考案に係るチユーナ回路における局
部発振回路及び局部発振出力回路の一実施例を示
す回路図、第２図は第１図における局部発振周波
数に対するインピーダンスＺｉの変化を示すスミ
スチヤート、第３図は従来のチユーナ回路におけ
る局部発振回路及び局部発振出力回路を示す回路
図、第４図は第３図における局部発振周波数に対
するインピーダンスＺｉの変化を示すスミスチヤ
ートである。
１……発振用インダクタ、２……同調用バラク
タダイオード、３，５……同調用コンデンサ、６
……発振回路部、８，１３……結合コンデンサ、
７……ループコイル、１２……導電パターン、１
５……プリスケーラ、２１……局部発振取出し用
コンデンサ。
FIG. 1 is a circuit diagram showing an embodiment of a local oscillation circuit and a local oscillation output circuit in a tuner circuit according to the present invention, and FIG. 2 is a Smith Chart diagram showing changes in impedance Zi with respect to the local oscillation frequency in FIG. FIG. 3 is a circuit diagram showing a local oscillation circuit and a local oscillation output circuit in a conventional tuner circuit, and FIG. 4 is a Smith chart showing changes in impedance Zi with respect to local oscillation frequency in FIG. 3. 1... Oscillation inductor, 2... Tuning varactor diode, 3, 5... Tuning capacitor, 6
...Oscillation circuit section, 8, 13...Coupling capacitor,
7... Loop coil, 12... Conductive pattern, 1
5...Prescaler, 21... Capacitor for extracting local oscillation.
Claims (1)
と、 発振用インダクタ、同調用バラクタダイオード
を含む同調回路と、この同調回路に接続した発振
回路と、前記発振用インダクタの近傍に配置され
、一端はアースパターンに接続し、他端より発振
出力を取り出し、結合コンデンサを介して前記混
合部に供給するピツクアツプ用コイルとから構成
される局部発振回路と、 前記ピツクアツプ用コイルの一端が接続したア
ースパターンの近傍に局部発振信号取出し用コン
デンサの一端をアース接続し、局部発振出力を該
コンデンサの他端から前記発振用インダクタの近
傍を導電パターンで通過させ、結合コンデンサを
介してＰＬＬ回路に供給する局部発振出力回路と を具備したことを特徴とするチユーナ回路。[Claims for Utility Model Registration] A mixing unit that mixes an input RF signal and a local oscillation signal, a tuning circuit including an oscillation inductor and a tuning varactor diode, an oscillation circuit connected to this tuning circuit, and the oscillation inductor. a local oscillation circuit that is arranged near the pickup coil, one end of which is connected to a ground pattern, and the other end of which takes out the oscillation output and supplies it to the mixing section via a coupling capacitor; and the pickup coil. One end of a capacitor for taking out a local oscillation signal is grounded near the ground pattern to which one end is connected, and the local oscillation output is passed from the other end of the capacitor near the oscillation inductor using a conductive pattern, and is then connected to the ground through a coupling capacitor. A tuner circuit comprising: a local oscillation output circuit for supplying a local oscillation output circuit to a PLL circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990005497U JPH0397244U (en) | 1990-01-23 | 1990-01-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990005497U JPH0397244U (en) | 1990-01-23 | 1990-01-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0397244U true JPH0397244U (en) | 1991-10-07 |
Family
ID=31509205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990005497U Pending JPH0397244U (en) | 1990-01-23 | 1990-01-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0397244U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006095164A (en) * | 2004-09-30 | 2006-04-13 | Sunstar Marketing Inc | Oral cavity cleaning apparatus |
-
1990
- 1990-01-23 JP JP1990005497U patent/JPH0397244U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006095164A (en) * | 2004-09-30 | 2006-04-13 | Sunstar Marketing Inc | Oral cavity cleaning apparatus |
| JP4631380B2 (en) * | 2004-09-30 | 2011-02-16 | サンスターマーケティング株式会社 | Oral cleaning tool |
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