JPS6266470U - - Google Patents
Info
- Publication number
- JPS6266470U JPS6266470U JP15910185U JP15910185U JPS6266470U JP S6266470 U JPS6266470 U JP S6266470U JP 15910185 U JP15910185 U JP 15910185U JP 15910185 U JP15910185 U JP 15910185U JP S6266470 U JPS6266470 U JP S6266470U
- Authority
- JP
- Japan
- Prior art keywords
- intermediate frequency
- signal
- audio
- frequency signal
- video
- 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
- 230000005236 sound signal Effects 0.000 claims 2
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Noise Elimination (AREA)
- Circuits Of Receivers In General (AREA)
- Television Receiver Circuits (AREA)
- Superheterodyne Receivers (AREA)
Description
第１図はこの考案の実施例を説明する回路ブロ
ツク図、第２図は従来例を説明する回路ブロツク
図である。
１……フロントエンド、１ａ……ＦＭ放送波用
フロントエンド、１ｂ……テレビジヨン放送波Ｖ
ＨＦ帯用フロントエンド、１ｄ……テレビジヨン
放送波ＵＨＦ帯用フロントエンド、２ａ……ＳＩ
Ｆ増幅回路、２ｂ……ＳＩＦ増幅回路、３ａ，３
ｂ……それぞれＦＭ検波回路、４ａ，４ｂ……そ
れぞれ同調検出回路、５……ＮＡＮＤ回路、６…
…音声増幅器、７……ゲート回路、Ｈ……ハイレ
ベル、Ｌ……ローレベル。
FIG. 1 is a circuit block diagram illustrating an embodiment of this invention, and FIG. 2 is a circuit block diagram illustrating a conventional example. 1...Front end, 1a...Front end for FM broadcast waves, 1b...Television broadcast waves V
Front end for HF band, 1d...Front end for television broadcast wave UHF band, 2a...SI
F amplifier circuit, 2b...SIF amplifier circuit, 3a, 3
b... FM detection circuit, respectively, 4a, 4b... Tuning detection circuit, respectively, 5... NAND circuit, 6...
...Audio amplifier, 7...Gate circuit, H...High level, L...Low level.
Claims (1)
のテレビジヨン放送波の音声信号波を同一の中間
周波信号に変換してＦＭ復調するスーパーヘテロ
ダイン方式のＦＭ受信装置において、前記テレビ
ジヨン放送波の音声信号を再生する際に、映像信
号を音声中間周波数より４．５ＭＨｚ離れた映像
中間周波信号に変換して同調の有無を検出し、音
声中間周波信号及び映像中間周波数信号が共に同
調したとき音声出力を消さないことを特徴とする
ＦＭ受信装置。 In a superheterodyne FM receiving device that converts FM broadcast waves in the VHF band and audio signal waves of television broadcast waves in the VHF band and UHF band into the same intermediate frequency signal and demodulates the same, the audio signal of the television broadcast waves is converted into the same intermediate frequency signal and demodulated. When reproducing a signal, the video signal is converted to a video intermediate frequency signal that is 4.5 MHz apart from the audio intermediate frequency to detect the presence or absence of synchronization, and when both the audio intermediate frequency signal and the video intermediate frequency signal are synchronized, audio is output. An FM receiving device characterized by not erasing .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15910185U JPS6266470U (en) | 1985-10-16 | 1985-10-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15910185U JPS6266470U (en) | 1985-10-16 | 1985-10-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6266470U true JPS6266470U (en) | 1987-04-24 |
Family
ID=31083215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15910185U Pending JPS6266470U (en) | 1985-10-16 | 1985-10-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6266470U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5028228A (en) * | 1973-07-11 | 1975-03-22 |
-
1985
- 1985-10-16 JP JP15910185U patent/JPS6266470U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5028228A (en) * | 1973-07-11 | 1975-03-22 |
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