JPH0443028U - - Google Patents
Info
- Publication number
- JPH0443028U JPH0443028U JP8345590U JP8345590U JPH0443028U JP H0443028 U JPH0443028 U JP H0443028U JP 8345590 U JP8345590 U JP 8345590U JP 8345590 U JP8345590 U JP 8345590U JP H0443028 U JPH0443028 U JP H0443028U
- Authority
- JP
- Japan
- Prior art keywords
- trap
- television
- receiving
- broadcast
- frequency
- 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.)
- Granted
Links
- 230000003321 amplification Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Filters And Equalizers (AREA)
- Noise Elimination (AREA)
Description
第１図はこの考案の第１実施例によるテレビジ
ヨンチユーナの構成を示すブロツク図、第２図は
同実施例におけるＦＭトラツプ１１および１６の
減衰特性を例示する図、第３図ａ〜ｃは同実施例
におけるＦＭトラツプ１６介挿の効果を説明する
図、第４図はこの考案の第２実施例によるテレビ
ジヨンチユーナの構成を示すブロツク図、第５図
ａ〜ｃは同実施例の等価回路を各受信バンド毎に
説明する図、第６図ａ〜ｃは同実施例におけるＦ
Ｍトラツプによる減衰特性を各受信バンド毎に説
明する図、第７図は従来のテレビジヨンチユーナ
の構成を示すブロツク図、第８図は第７図におけ
るＦＭトラツプ１１の減衰特性を例示する図であ
る。
３……高周波増幅回路、５……混合回路、６…
…局部発信回路、１１，１１ａ……第１のＦＭト
ラツプ、１６，１６ａ……第２のＦＭトラツプ、
７，１２，１５……コイル、８，１３，１４……
容量、１８，２２，２７……スイツチダイオード
、Ｈ……ハイバンド選択端子、Ｂ６……第６チヤ
ンネル選択端子。
FIG. 1 is a block diagram showing the configuration of a television tuner according to a first embodiment of the invention, FIG. 2 is a diagram illustrating the attenuation characteristics of FM traps 11 and 16 in the same embodiment, and FIGS. 3 a to c 4 is a block diagram showing the configuration of a television tuner according to a second embodiment of this invention, and FIGS. Figures 6a to 6c are diagrams explaining the equivalent circuit of each receiving band for each receiving band.
FIG. 7 is a block diagram showing the configuration of a conventional television tuner; FIG. 8 is a diagram illustrating the attenuation characteristics of the FM trap 11 in FIG. 7. It is. 3... High frequency amplifier circuit, 5... Mixing circuit, 6...
...local oscillation circuit, 11, 11a...first FM trap, 16, 16a...second FM trap,
7, 12, 15... Coil, 8, 13, 14...
Capacitor, 18, 22, 27...Switch diode, H...High band selection terminal, B6...Sixth channel selection terminal.
Claims (1)
、第２のＦＭトラツプと、周波数変換回路とを順
次接続したことを特徴とするテレビジヨンチユー
ナ。 (2) 前記第１のＦＭトラツプは、ハイバンドに
あるテレビ放送を受信する時のみ有効化されるこ
とを特徴とする請求項第１記載のテレビジヨンチ
ユーナ。 (3) 前記第２のＦＭトラツプは、ローバンドに
あるテレビチヤンネルのうちＦＭ放送領域に最も
近い周波数のテレビチヤンネルの放送を受信する
時と、ローバンドにあるその他のテレビチヤンネ
ルの放送を受信する時とでトラツプ周波数が切り
換えられることを特徴とする請求項第１および／
または請求項第２記載のテレビジヨンチユーナ。[Claims for Utility Model Registration] (1) A television tuner characterized in that a first FM trap, a high frequency amplification circuit, a second FM trap, and a frequency conversion circuit are sequentially connected. (2) The television tuner according to claim 1, wherein the first FM trap is activated only when receiving television broadcasts in a high band. (3) The second FM trap is used when receiving the broadcast of a television channel in the low band whose frequency is closest to the FM broadcast area, and when receiving the broadcast of another television channel in the low band. Claim 1 and/or wherein the trap frequency is switched at
Or the television station according to claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990083455U JP2584612Y2 (en) | 1990-08-07 | 1990-08-07 | Television tuner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990083455U JP2584612Y2 (en) | 1990-08-07 | 1990-08-07 | Television tuner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0443028U true JPH0443028U (en) | 1992-04-13 |
| JP2584612Y2 JP2584612Y2 (en) | 1998-11-05 |
Family
ID=31631142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990083455U Expired - Lifetime JP2584612Y2 (en) | 1990-08-07 | 1990-08-07 | Television tuner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2584612Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007281585A (en) * | 2006-04-03 | 2007-10-25 | Alps Electric Co Ltd | Input circuit for television tuner |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58188526A (en) * | 1982-04-28 | 1983-11-04 | Fujitsu Ltd | Automatic slag separating device |
| JPS63147075U (en) * | 1987-03-17 | 1988-09-28 |
-
1990
- 1990-08-07 JP JP1990083455U patent/JP2584612Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58188526A (en) * | 1982-04-28 | 1983-11-04 | Fujitsu Ltd | Automatic slag separating device |
| JPS63147075U (en) * | 1987-03-17 | 1988-09-28 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007281585A (en) * | 2006-04-03 | 2007-10-25 | Alps Electric Co Ltd | Input circuit for television tuner |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2584612Y2 (en) | 1998-11-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |