JPH02137173U - - Google Patents
Info
- Publication number
- JPH02137173U JPH02137173U JP4477989U JP4477989U JPH02137173U JP H02137173 U JPH02137173 U JP H02137173U JP 4477989 U JP4477989 U JP 4477989U JP 4477989 U JP4477989 U JP 4477989U JP H02137173 U JPH02137173 U JP H02137173U
- Authority
- JP
- Japan
- Prior art keywords
- trap
- match
- control signal
- specific frequency
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は本考案の一実施例のブロツク図、第２
図は各テレビ放送方式の周波数帯域およびトラツ
プフイルタ２の減衰率特性図、第３図は従来のテ
レビ受信器のブロツク図である。
１……チユーナ、２……トラツプフイルタ、４
……検波回路、５……検知回路。
Fig. 1 is a block diagram of an embodiment of the present invention;
The figure shows the frequency bands of each television broadcast system and the attenuation rate characteristics of the trap filter 2, and FIG. 3 is a block diagram of a conventional television receiver. 1... Tuner, 2... Trap filter, 4
...Detection circuit, 5...Detection circuit.
Claims (1)
させるトラツプの有効無効が制御信号によつて切
り換えられるトラツプフイルタと、このトラツプ
フイルタの出力信号から音声搬送波の周背数が特
定周波数に一致しているか否かを検出し、一致し
ている場合には前記トラツプを有効とするように
前記制御信号を出力するトラツプ切換制御部とを
具備することを特徴とするテレビ受信器。 A trap filter is provided in an intermediate frequency circuit and enables or disables a trap that attenuates a specific frequency range by a control signal, and the output signal of this trap filter determines whether or not the frequency of the audio carrier wave matches the specific frequency. and a trap switching control section that detects a match and outputs the control signal to enable the trap when the traps match.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4477989U JPH02137173U (en) | 1989-04-17 | 1989-04-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4477989U JPH02137173U (en) | 1989-04-17 | 1989-04-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02137173U true JPH02137173U (en) | 1990-11-15 |
Family
ID=31558380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4477989U Pending JPH02137173U (en) | 1989-04-17 | 1989-04-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02137173U (en) |
-
1989
- 1989-04-17 JP JP4477989U patent/JPH02137173U/ja active Pending