JPS6368260U - - Google Patents
Info
- Publication number
- JPS6368260U JPS6368260U JP16005386U JP16005386U JPS6368260U JP S6368260 U JPS6368260 U JP S6368260U JP 16005386 U JP16005386 U JP 16005386U JP 16005386 U JP16005386 U JP 16005386U JP S6368260 U JPS6368260 U JP S6368260U
- Authority
- JP
- Japan
- Prior art keywords
- tuning voltage
- frequency signal
- intermediate frequency
- voltage
- electronic tuner
- 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
- 230000005684 electric field Effects 0.000 claims 1
- 230000010355 oscillation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Picture Signal Circuits (AREA)
- Television Receiver Circuits (AREA)
Description
図面は本考案の一実施例を示すもので、第１図
は回路構成を示すブロツク図、第２図ａ，ｂ，ｃ
は第１図におけるバイアス回路の詳細を示す図、
第３図は画質調整動作を説明するための周波数特
性を示す図である。
１１……チユーナ、１２……ＳＡＷフイルタ、
１３……中間周波増幅／検波回路、１４……バイ
アス回路、１５……チユーニング電圧発生回路。
The drawings show one embodiment of the present invention, and FIG. 1 is a block diagram showing the circuit configuration, and FIG. 2 is a, b, and c.
is a diagram showing details of the bias circuit in FIG. 1,
FIG. 3 is a diagram showing frequency characteristics for explaining the image quality adjustment operation. 11... Chuyuna, 12... SAW filter,
13... Intermediate frequency amplification/detection circuit, 14... Bias circuit, 15... Tuning voltage generation circuit.
Claims (1)
において、チユーニング電圧に応じて局部発振周
波数を変え、受信高周波信号との差の周波数を中
間周波数として出力する電子チユーナと、この電
子チユーナから出力される中間周波信号が入力さ
れ、隣接チヤンネルの中間周波信号を減衰させる
ＳＡＷフイルタと、このＳＡＷフイルタを介して
得られる中間周波信号を検波し、その検波出力に
応じてＡＧＣ電圧を出力する手段と、チユーニン
グ用電圧を発生するチユーニング電圧発生回路と
、このチユーニング電圧発生回路の出力電圧を上
記ＡＧＣ電圧に応じて微調整し、チユーニング電
圧として上記電子チユーナに供給するバイアス回
路とを具備し、電界強度が強くなるに従つて中間
周波信号が高い方向にシフトされるようにしたこ
とを特徴とする自動画質調整回路。 In the automatic video quality adjustment circuit of a television receiver, there is an electronic tuner that changes the local oscillation frequency according to the tuning voltage and outputs the difference frequency from the received high frequency signal as an intermediate frequency, and an intermediate frequency signal output from this electronic tuner. is input, a SAW filter that attenuates the intermediate frequency signal of the adjacent channel, a means for detecting the intermediate frequency signal obtained through the SAW filter and outputting an AGC voltage according to the detected output, and a tuning voltage. It is equipped with a tuning voltage generation circuit that generates a tuning voltage, and a bias circuit that finely adjusts the output voltage of this tuning voltage generation circuit according to the AGC voltage and supplies it as a tuning voltage to the electronic tuner, and as the electric field strength increases. An automatic video quality adjustment circuit characterized in that an intermediate frequency signal is shifted in a higher direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16005386U JPS6368260U (en) | 1986-10-21 | 1986-10-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16005386U JPS6368260U (en) | 1986-10-21 | 1986-10-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6368260U true JPS6368260U (en) | 1988-05-09 |
Family
ID=31085064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16005386U Pending JPS6368260U (en) | 1986-10-21 | 1986-10-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6368260U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997038525A1 (en) * | 1996-04-04 | 1997-10-16 | Sony Corporation | Television receiver |
-
1986
- 1986-10-21 JP JP16005386U patent/JPS6368260U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997038525A1 (en) * | 1996-04-04 | 1997-10-16 | Sony Corporation | Television receiver |
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