JPH036381U - - Google Patents
Info
- Publication number
- JPH036381U JPH036381U JP1989066607U JP6660789U JPH036381U JP H036381 U JPH036381 U JP H036381U JP 1989066607 U JP1989066607 U JP 1989066607U JP 6660789 U JP6660789 U JP 6660789U JP H036381 U JPH036381 U JP H036381U
- Authority
- JP
- Japan
- Prior art keywords
- intermediate frequency
- frequency
- audio
- detection
- signal
- 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
- 238000001514 detection method Methods 0.000 claims 6
- 230000003321 amplification Effects 0.000 claims 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims 3
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 238000001228 spectrum Methods 0.000 description 1
Landscapes
- Television Receiver Circuits (AREA)
Description
第１図は本考案の一実施例のテレビジヨン受信
装置を示すブロツク図、第２図は第１図のＳＡＷ
フイルタの周波数特性を示す特性図、第３図は本
考案の他の実施例におけるＳＡＷフイルタの周波
数特性を示す特性図、第４図は従来のテレビジヨ
ン受信装置を示すブロツク図、第５図は第４図の
ＳＡＷフイルタの周波数特性を示すブロツク図、
第６図はＶＨＦハイバンドにおけるテレビジヨン
放送波の周波数スペクトラムの一例を示す説明図
である。
２……ＥＴチユーナ、３Ａ……ＳＡＷフイルタ
、４……ＰＩＦ回路、５……復調回路、６……切
換回路、７……ＣＲＴ、８……第１のＳＩＦ回路
、９……第２のＳＩＦ回路、１２……システム制
御用マイコン。
FIG. 1 is a block diagram showing a television receiver according to an embodiment of the present invention, and FIG. 2 is a block diagram showing the SAW of FIG. 1.
FIG. 3 is a characteristic diagram showing the frequency characteristics of a SAW filter in another embodiment of the present invention. FIG. 4 is a block diagram showing a conventional television receiver. A block diagram showing the frequency characteristics of the SAW filter in Fig. 4,
FIG. 6 is an explanatory diagram showing an example of the frequency spectrum of television broadcast waves in the VHF high band. 2...ET tuner, 3A...SAW filter, 4...PIF circuit, 5...demodulation circuit, 6...switching circuit, 7...CRT, 8...first SIF circuit, 9...second SIF circuit, 12... microcomputer for system control.
Claims (1)
に変換する周波数変換手段と、 所定の映像周波数特性を有し、前記周波数変換
手段から中間周波信号を入力し、映像検波用の出
力信号を得る第１のフイルタ手段と、 所定の音声周波数特性を有し、前記周波数変換
手段から中間周波信号を入力し、音声検波用の出
力信号を得る第２のフイルタ手段と、 前記第１のフイルタ手段からの映像検波用出力
信号を増幅、検波する第１の中間周波数増幅手段
と、 前記第２のフイルタ手段からの音声検波用出力
信号を増幅、検波する機能を有すると共に、受信
信号レベルに応じたＡＧＣ電圧を作成する機能を
備えた第２の中間周波増幅手段と、 この第２の中間周波増幅手段からのＡＧＣ電圧
のレベルを検出し、受信信号レベルの大きさを判
定する手段と、 この手段の判定結果を表示する表示手段と を具備したことを特徴とするテレビジヨン受信
装置。 (2) 請求項１記載のテレビジヨン受信装置にお
いて、前記第２のフイルタ手段は、前記第２の中
間周波増幅手段でセパレート検波を行うべく、音
声中間周波数を中心とした狭帯域の音声周波数特
性を有することを特徴とするテレビジヨン受信装
置。 (3) 請求項１記載のテレビジヨン受信装置にお
いて、前記第２のフイルタ手段は、前記第２の中
間周波増幅手段でインターキヤリア検波を行うべ
く、映像中間周波数及び音声中間周波数を中心と
した狭帯域の音声周波数特性を有することを特徴
とするテレビジヨン受信装置。[Claims for Utility Model Registration] (1) Frequency converting means for receiving a television signal and converting it into an intermediate frequency signal; having predetermined video frequency characteristics and inputting the intermediate frequency signal from the frequency converting means; a first filter means for obtaining an output signal for video detection; a second filter means having a predetermined audio frequency characteristic and receiving an intermediate frequency signal from the frequency conversion means and obtaining an output signal for audio detection; , a first intermediate frequency amplification means for amplifying and detecting an output signal for video detection from the first filter means, and a function for amplifying and detecting an output signal for audio detection from the second filter means; , a second intermediate frequency amplifying means having a function of creating an AGC voltage according to the received signal level, and detecting the level of the AGC voltage from the second intermediate frequency amplifying means and determining the magnitude of the received signal level. A television receiving device comprising: means for determining; and display means for displaying the determination result of the means. (2) In the television receiving apparatus according to claim 1, the second filter means has a narrow band audio frequency characteristic centered around the audio intermediate frequency so that the second intermediate frequency amplification means performs separate detection. A television receiving device comprising: (3) In the television receiving apparatus according to claim 1, the second filter means has a narrow filter centered around the video intermediate frequency and the audio intermediate frequency so that the second intermediate frequency amplification means performs intercarrier detection. A television receiving device characterized by having band audio frequency characteristics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989066607U JPH0727732Y2 (en) | 1989-06-07 | 1989-06-07 | Television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989066607U JPH0727732Y2 (en) | 1989-06-07 | 1989-06-07 | Television receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH036381U true JPH036381U (en) | 1991-01-22 |
| JPH0727732Y2 JPH0727732Y2 (en) | 1995-06-21 |
Family
ID=31599459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989066607U Expired - Lifetime JPH0727732Y2 (en) | 1989-06-07 | 1989-06-07 | Television receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0727732Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007159453A (en) * | 2005-12-13 | 2007-06-28 | Kao Corp | Cleaning agent for small animals |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5142446A (en) * | 1974-10-08 | 1976-04-10 | Matsushita Electric Industrial Co Ltd | Surface acoustic wave filter |
| JPS5190520A (en) * | 1975-02-07 | 1976-08-09 |
-
1989
- 1989-06-07 JP JP1989066607U patent/JPH0727732Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5142446A (en) * | 1974-10-08 | 1976-04-10 | Matsushita Electric Industrial Co Ltd | Surface acoustic wave filter |
| JPS5190520A (en) * | 1975-02-07 | 1976-08-09 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007159453A (en) * | 2005-12-13 | 2007-06-28 | Kao Corp | Cleaning agent for small animals |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0727732Y2 (en) | 1995-06-21 |
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