JPH0191329U - - Google Patents
Info
- Publication number
- JPH0191329U JPH0191329U JP18735287U JP18735287U JPH0191329U JP H0191329 U JPH0191329 U JP H0191329U JP 18735287 U JP18735287 U JP 18735287U JP 18735287 U JP18735287 U JP 18735287U JP H0191329 U JPH0191329 U JP H0191329U
- Authority
- JP
- Japan
- Prior art keywords
- sets
- high frequency
- parallel
- parallel circuits
- variable capacitance
- 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 3
Description
第１図は本考案に係る広帯域用チユーナの同調
回路の一実施例を説明するためのもので、ＣＡＴ
Ｖ用チユーナの回路構成を示すブロツク図である
。第２図はＣＡＴＶ用チユーナの同調回路の従来
例を説明するためのもので、ＣＡＴＶ用チユーナ
の回路構成を示すブロツク図、第３図はＣＡＴＶ
用チユーナに使用される第２の可変容量ダイオー
ドの特性図である。
２′……（入力段）同調回路、７……広帯域用
チユーナ（ＣＡＴＶ用チユーナ）、８……可変容
量ダイオード、９……並列回路。
FIG. 1 is for explaining an embodiment of a tuning circuit for a broadband tuner according to the present invention.
FIG. 2 is a block diagram showing the circuit configuration of a V tuner. Figure 2 is for explaining a conventional example of a tuning circuit for a CATV tuner, and is a block diagram showing the circuit configuration of a CATV tuner.
FIG. 4 is a characteristic diagram of a second variable capacitance diode used in a tuner for use in the present invention. 2'... (input stage) tuning circuit, 7... broadband tuner (CATV tuner), 8... variable capacitance diode, 9... parallel circuit.
Claims (1)
接続し、この並列回路の２組を高周波的に直列に
接続し、これら２組の並列回路の接続点より各ダ
イオードに同調電圧を印加するようにしたことを
特徴とする広帯域同調回路。 Two variable capacitance diodes are connected in parallel at high frequency, two sets of these parallel circuits are connected in series at high frequency, and a tuning voltage is applied to each diode from the connection point of these two sets of parallel circuits. A wideband tuning circuit characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18735287U JPH0191329U (en) | 1987-12-08 | 1987-12-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18735287U JPH0191329U (en) | 1987-12-08 | 1987-12-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0191329U true JPH0191329U (en) | 1989-06-15 |
Family
ID=31478511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18735287U Pending JPH0191329U (en) | 1987-12-08 | 1987-12-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0191329U (en) |
-
1987
- 1987-12-08 JP JP18735287U patent/JPH0191329U/ja active Pending
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