JPS6266427U - - Google Patents
Info
- Publication number
- JPS6266427U JPS6266427U JP15910085U JP15910085U JPS6266427U JP S6266427 U JPS6266427 U JP S6266427U JP 15910085 U JP15910085 U JP 15910085U JP 15910085 U JP15910085 U JP 15910085U JP S6266427 U JPS6266427 U JP S6266427U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- intermediate frequency
- audio
- frequency signal
- broadcast waves
- 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
- 230000010355 oscillation Effects 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Superheterodyne Receivers (AREA)
- Noise Elimination (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、８……ＡＦＣ
回路、Ｈ……ハイレベル、Ｌ……ローレベル、Ｓ
１，Ｓ２，Ｓ３……それぞれ連動スイツチ、Ｓ４
……スイツチ。
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, 8...AFC
Circuit, H...High level, L...Low level, S
1 , S2 , S3 ...each interlocking switch, S4
...Switch.
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信号が共に同調
したときに、ＦＭ検波器の出力電圧で局部発振器
の発振周波数を自動的に同調点を維持するように
制御したことを特徴とする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 FM demodulates the same, the audio signal of the television broadcast waves is When reproducing the signal, the video signal is converted to a video intermediate frequency signal that is 4.5 MHz apart from the audio intermediate frequency, and the presence or absence of synchronization is detected, and when the audio intermediate frequency signal and the video intermediate frequency signal are both synchronized, An FM receiver characterized in that the oscillation frequency of a local oscillator is automatically controlled to maintain a tuning point using the output voltage of an FM detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15910085U JPS6266427U (en) | 1985-10-16 | 1985-10-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15910085U JPS6266427U (en) | 1985-10-16 | 1985-10-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6266427U true JPS6266427U (en) | 1987-04-24 |
Family
ID=31083213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15910085U Pending JPS6266427U (en) | 1985-10-16 | 1985-10-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6266427U (en) |
-
1985
- 1985-10-16 JP JP15910085U patent/JPS6266427U/ja active Pending
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