JPH0177044U - - Google Patents
Info
- Publication number
- JPH0177044U JPH0177044U JP1987173132U JP17313287U JPH0177044U JP H0177044 U JPH0177044 U JP H0177044U JP 1987173132 U JP1987173132 U JP 1987173132U JP 17313287 U JP17313287 U JP 17313287U JP H0177044 U JPH0177044 U JP H0177044U
- Authority
- JP
- Japan
- Prior art keywords
- matching
- circuit
- inductance
- coils
- coil
- 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
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims description 2
- 230000010355 oscillation Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Superheterodyne Receivers (AREA)
Description
第１図は本考案を実施したチユーナ装置の要部
回路図、第２図は従来のチユーナ装置の要部回路
図、第３図及び第４図は夫々他の従来例を示す回
路図である。
１……段間結合回路、２……混合用トランジス
タ、３，３′……結合コンデンサ、５，６……第
１、第２マツチングコイル、１２……局部発振回
路。
Fig. 1 is a circuit diagram of a main part of a tuner device implementing the present invention, Fig. 2 is a circuit diagram of a main part of a conventional tuner device, and Figs. 3 and 4 are circuit diagrams showing other conventional examples. . 1... Interstage coupling circuit, 2... Mixing transistor, 3, 3'... Coupling capacitor, 5, 6... First and second matching coils, 12... Local oscillation circuit.
Claims (1)
チングコイルを直列に接続し、前記第１、第２マ
ツチングコイルの接続中点に段間結合回路の出力
信号と、局部発振回路の出力信号を夫々結合コン
デンサを介して結合し、前記第２マツチングコイ
ルのインダクタンスは第１マツチングコイルのイ
ンダクタンスに比べ充分な大きさに選定されてい
るチユーナ装置。 First and second matching coils are connected in series between the input end of the mixing circuit and the ground, and the output signal of the interstage coupling circuit and the local oscillation circuit are connected to the connection midpoint of the first and second matching coils. A tuner device in which output signals are coupled through respective coupling capacitors, and the inductance of the second matching coil is selected to be sufficiently large compared to the inductance of the first matching coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987173132U JPH0177044U (en) | 1987-11-12 | 1987-11-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987173132U JPH0177044U (en) | 1987-11-12 | 1987-11-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0177044U true JPH0177044U (en) | 1989-05-24 |
Family
ID=31465068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987173132U Pending JPH0177044U (en) | 1987-11-12 | 1987-11-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0177044U (en) |
-
1987
- 1987-11-12 JP JP1987173132U patent/JPH0177044U/ja active Pending