JPH0172781U - - Google Patents
Info
- Publication number
- JPH0172781U JPH0172781U JP1987168306U JP16830687U JPH0172781U JP H0172781 U JPH0172781 U JP H0172781U JP 1987168306 U JP1987168306 U JP 1987168306U JP 16830687 U JP16830687 U JP 16830687U JP H0172781 U JPH0172781 U JP H0172781U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- agc
- video
- tape recorder
- circuit
- 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
- 238000001514 detection method Methods 0.000 claims description 3
- 230000005236 sound signal Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Television Signal Processing For Recording (AREA)
Description
第１図は本考案の第１実施例を示す図、第２図
は各部の波形を示す図である。第３図は本考案の
第２実施例を示す図、第４図は各部の波形を示す
図である。
１６……ＡＧＣ用の映像検波回路、ｇ……利得
制御信号、１４……ＡＧＣ用増幅器、２４……Ｒ
Ｆコンバータ、Ｍ……音声ミユート信号（入力映
像切換信号）、２２，２２′……減衰制御手段。
FIG. 1 is a diagram showing a first embodiment of the present invention, and FIG. 2 is a diagram showing waveforms at various parts. FIG. 3 is a diagram showing a second embodiment of the present invention, and FIG. 4 is a diagram showing waveforms at various parts. 16...Video detection circuit for AGC, g...Gain control signal, 14...Amplifier for AGC, 24...R
F converter, M...audio mute signal (input video switching signal), 22, 22'...attenuation control means.
Claims (1)
得を制御されるＡＧＣ用増幅器と、 音声信号と前記ＡＧＣ用増幅器からの映像信号
とを無線周波数信号に変換するＲＦコンバータと
を、 備えるビデオテープレコーダ用ＡＧＣ回路に於
いて、 入力映像切換信号に基づいて前記ＡＧＣ用増幅
器の利得を所定期間減衰せしめる減衰制御手段を
備えることを特徴とするビデオテープレコーダ用
ＡＧＣ回路。 (2) 前記入力映像切換信号は、選局切換時の音
声ミユート用信号であることを特徴とする実用新
案登録請求の範囲第１項記載のビデオテープレコ
ーダ用ＡＧＣ回路。[Claims for Utility Model Registration] (1) A video detection circuit for AGC, an AGC amplifier whose gain is controlled by a gain control signal from the video detection circuit, and an audio signal and video from the AGC amplifier. An AGC circuit for a video tape recorder comprising: an RF converter for converting a signal into a radio frequency signal; Features AGC circuit for video tape recorder. (2) The AGC circuit for a video tape recorder according to claim 1, wherein the input video switching signal is a signal for audio muting at the time of channel selection switching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987168306U JPH0172781U (en) | 1987-11-02 | 1987-11-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987168306U JPH0172781U (en) | 1987-11-02 | 1987-11-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0172781U true JPH0172781U (en) | 1989-05-16 |
Family
ID=31457371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987168306U Pending JPH0172781U (en) | 1987-11-02 | 1987-11-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0172781U (en) |
-
1987
- 1987-11-02 JP JP1987168306U patent/JPH0172781U/ja active Pending
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