JPH0344378U - - Google Patents
Info
- Publication number
- JPH0344378U JPH0344378U JP1989102951U JP10295189U JPH0344378U JP H0344378 U JPH0344378 U JP H0344378U JP 1989102951 U JP1989102951 U JP 1989102951U JP 10295189 U JP10295189 U JP 10295189U JP H0344378 U JPH0344378 U JP H0344378U
- Authority
- JP
- Japan
- Prior art keywords
- variable gain
- audio
- signal
- video
- agc
- 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 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Television Receiver Circuits (AREA)
- Amplifiers (AREA)
- Circuits Of Receivers In General (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Description
第１図はこの考案の１つの実施例に係る車載テ
レビ受信機の構成を示すブロツク図、第２図は第
１図の音声ＡＧＣの動作を説明するための線図で
ある。第３図は従来のテレビ受信機の構成を示す
ブロツク図、第４図は第３図の映像ＡＧＣの動作
を説明するための線図である。
主な符号の説明、１１……フロントエンド、１
２……ＲＦ増幅器、３２……映像ＡＧＣ回路、４
１……ＡＧＣ用増幅器、４５……第２周波数変換
器、４６Ａ……音声中間周波増幅器、５４……Ｓ
メータ回路。
FIG. 1 is a block diagram showing the configuration of an in-vehicle television receiver according to one embodiment of this invention, and FIG. 2 is a diagram for explaining the operation of the audio AGC shown in FIG. 1. FIG. 3 is a block diagram showing the configuration of a conventional television receiver, and FIG. 4 is a diagram for explaining the operation of the video AGC shown in FIG. Explanation of main codes, 11...Front end, 1
2...RF amplifier, 32...Video AGC circuit, 4
1...AGC amplifier, 45...Second frequency converter, 46A...Audio intermediate frequency amplifier, 54...S
meter circuit.
Claims (1)
、フロントエンドへ出力してゲイン可変制御を行
う映像ＡＧＣ回路と、フロントエンド出力から映
像中間周波信号とは別に取り出された音声第１中
間周波信号を周波数変換して音声第２中間周波信
号を形成する第２周波数変換器と、を有する車載
テレビ受信機において、 第２周波数変換器の前段側に設けられてゲイン
可変制御が可能なゲイン可変回路と、 音声第２中間周波信号のレベルを検出して音声
ＡＧＣ信号を作成し、ゲイン可変回路へ出力して
ゲイン可変制御を行う音声ＡＧＣ回路と、 を備えたことを特徴とする車載テレビ受信機。 (2) ゲイン可変回路を設ける代わりに、第２周
波数変換器をゲイン可変制御ができるようにし、
音声ＡＧＣ信号で第２周波数変換器にゲイン可変
制御を行わせるようにしたこと、 を特徴とする車載テレビ受信機。[Scope of Claim for Utility Model Registration] (1) A video AGC circuit that creates a video AGC signal from the video detection output and outputs it to the front end for variable gain control, and a video intermediate frequency signal that is extracted from the front end output separately from the video AGC signal. a second frequency converter that frequency-converts a first audio intermediate frequency signal to form a second audio intermediate frequency signal; A variable gain circuit capable of variable control; and an audio AGC circuit that detects the level of the audio second intermediate frequency signal to create an audio AGC signal and outputs it to the variable gain circuit to perform variable gain control. An in-vehicle TV receiver featuring: (2) Instead of providing a variable gain circuit, the second frequency converter can be controlled with variable gain,
An in-vehicle television receiver characterized by: causing a second frequency converter to perform variable gain control using an audio AGC signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989102951U JPH0733497Y2 (en) | 1989-08-31 | 1989-08-31 | Car TV receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989102951U JPH0733497Y2 (en) | 1989-08-31 | 1989-08-31 | Car TV receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0344378U true JPH0344378U (en) | 1991-04-24 |
| JPH0733497Y2 JPH0733497Y2 (en) | 1995-07-31 |
Family
ID=31651817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989102951U Expired - Lifetime JPH0733497Y2 (en) | 1989-08-31 | 1989-08-31 | Car TV receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0733497Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005318252A (en) * | 2004-04-28 | 2005-11-10 | Renesas Technology Corp | Intermediate frequency signal processor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60206274A (en) * | 1984-03-30 | 1985-10-17 | Pioneer Electronic Corp | Television receiving set |
-
1989
- 1989-08-31 JP JP1989102951U patent/JPH0733497Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60206274A (en) * | 1984-03-30 | 1985-10-17 | Pioneer Electronic Corp | Television receiving set |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005318252A (en) * | 2004-04-28 | 2005-11-10 | Renesas Technology Corp | Intermediate frequency signal processor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0733497Y2 (en) | 1995-07-31 |