JPS6390374U - - Google Patents
Info
- Publication number
- JPS6390374U JPS6390374U JP18423486U JP18423486U JPS6390374U JP S6390374 U JPS6390374 U JP S6390374U JP 18423486 U JP18423486 U JP 18423486U JP 18423486 U JP18423486 U JP 18423486U JP S6390374 U JPS6390374 U JP S6390374U
- Authority
- JP
- Japan
- Prior art keywords
- intermediate frequency
- audio signal
- detector
- signal
- audio
- 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 description 13
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 13
- 230000005236 sound signal Effects 0.000 claims description 13
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 1
Description
第１図はこの考案のＦＭ／ＡＭ両用音声信号増
幅回路のブロツク図、第２図は従来例の第１図相
当図、第３図はＦＭ波を示す説明図、第４図はＡ
Ｍ波を示す説明図である。
１…音声信号中間周波増幅回路、５…音声中間
周波増幅手段、９…ＦＭ検波器、１０…ＡＭ検波
器、１１…第１切換手段、１３…振幅検出回路、
１５…定電圧手段、１４…第２切換手段。
Fig. 1 is a block diagram of the FM/AM dual-use audio signal amplification circuit of this invention, Fig. 2 is a diagram corresponding to Fig. 1 of the conventional example, Fig. 3 is an explanatory diagram showing FM waves, and Fig. 4 is an A
It is an explanatory diagram showing M waves. DESCRIPTION OF SYMBOLS 1...Audio signal intermediate frequency amplification circuit, 5...Audio intermediate frequency amplification means, 9...FM detector, 10...AM detector, 11...First switching means, 13...Amplitude detection circuit,
15... constant voltage means, 14... second switching means.
Claims (1)
を増幅する映像信号中間周波増幅回路と、映像信
号中間周波増幅回路からの音声中間周波信号を増
幅する音声信号中間周波増幅回路とを備えるＴＶ
受像装置において、 音声信号中間周波増幅回路が、ＦＭ音声信号及
びＡＭ音声信号をそれぞれ異なる増幅率にて増幅
する音声中間周波増幅手段と、その音声中間周波
増幅手段の出力に接続されるＦＭ検波器及びＡＭ
検波器と、これらの両検波器に接続されたチユー
ナにて受信される音声信号がＦＭ音声信号の場合
にはＦＭ検波器を、また、受信される音声信号が
ＡＭ音声信号の場合にはＡＭ検波器をそれぞれ動
作させる第１切換手段と、ＡＭ検波器の出力に接
続されＡＭ音声信号の出力振幅を一定に保つ振幅
検出手段と、ＦＭ検波器が動作中には音声信号中
間周波増幅手段を所定の増幅率にて作動させる定
電圧手段と、第１切換手段に連動して作動しＡＭ
検波器が動作中には音声信号中間周波増幅手段を
振幅検出手段からの出力信号により所定の増幅率
にて作動させるよう上記出力信号と定電圧手段か
らの出力電圧とを切り換えて音声信号中間周波増
幅手段に入力する第２切換手段とを具備したこと
を特徴とするＴＶ受像装置。[Claims for Utility Model Registration] A tuner, a video signal intermediate frequency amplification circuit that amplifies the video intermediate frequency signal from the tuner, and an audio signal intermediate frequency amplification circuit that amplifies the audio intermediate frequency signal from the video signal intermediate frequency amplification circuit. TV equipped with
In the image receiving device, the audio signal intermediate frequency amplification circuit includes audio intermediate frequency amplification means for amplifying the FM audio signal and the AM audio signal at different amplification factors, and an FM detector connected to the output of the audio intermediate frequency amplification means. and A.M.
If the audio signal received by the detector and the tuner connected to both detectors is an FM audio signal, the FM detector, and if the audio signal received by the tuner is an AM audio signal, the AM detector. a first switching means for operating each of the detectors, an amplitude detecting means connected to the output of the AM detector to keep the output amplitude of the AM audio signal constant, and an audio signal intermediate frequency amplifying means when the FM detector is in operation. A constant voltage means operated at a predetermined amplification factor and an AM
While the detector is in operation, the output signal and the output voltage from the constant voltage means are switched so that the audio signal intermediate frequency amplifying means is operated at a predetermined amplification factor by the output signal from the amplitude detecting means. A TV receiver comprising: second switching means for inputting to the amplification means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18423486U JPH0448059Y2 (en) | 1986-11-29 | 1986-11-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18423486U JPH0448059Y2 (en) | 1986-11-29 | 1986-11-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6390374U true JPS6390374U (en) | 1988-06-11 |
| JPH0448059Y2 JPH0448059Y2 (en) | 1992-11-12 |
Family
ID=31131716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18423486U Expired JPH0448059Y2 (en) | 1986-11-29 | 1986-11-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0448059Y2 (en) |
-
1986
- 1986-11-29 JP JP18423486U patent/JPH0448059Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0448059Y2 (en) | 1992-11-12 |
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