JPS59159085U - Buzz noise prevention circuit for video signal playback equipment - Google Patents
Buzz noise prevention circuit for video signal playback equipmentInfo
- Publication number
- JPS59159085U JPS59159085U JP5385183U JP5385183U JPS59159085U JP S59159085 U JPS59159085 U JP S59159085U JP 5385183 U JP5385183 U JP 5385183U JP 5385183 U JP5385183 U JP 5385183U JP S59159085 U JPS59159085 U JP S59159085U
- Authority
- JP
- Japan
- Prior art keywords
- video signal
- prevention circuit
- playback equipment
- noise prevention
- signal playback
- 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
Landscapes
- Television Signal Processing For Recording (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来のビデオテープレコーダなどの映像信号再
生装置の主なる回路のうち輝度信号に係る部分の構成を
示す図、第２図Ｃ↓本考案になる映像信号再生装置のバ
ズ音防止回路の一実施例の回路構成を示す図である。
４・・・ビデオ出力アンプ、５・・・ＲＦコンバータ、
７・・・エンベロープ検波回路、８・・・コンパレータ
、９・・・波抱整形回路、Ｃ１〜ｑ３・・・コンデンサ
、Ｒ１−Ｒ６・・・抵抗、Ｄｌ、Ｄ２・・・ダイオード
、Ｑ・・・ＮＰＮ ）ランジスタ、Ｅ・・・直流電圧源
、Ｖｃｃ・・・直流電源。Figure 1 is a diagram showing the configuration of the part related to the luminance signal among the main circuits of a conventional video signal reproducing device such as a video tape recorder, and Figure 2 C ↓ Buzz sound prevention circuit of the video signal reproducing device of the present invention FIG. 2 is a diagram showing a circuit configuration of an embodiment. 4...Video output amplifier, 5...RF converter,
7...Envelope detection circuit, 8...Comparator, 9...Holder shaping circuit, C1-q3...Capacitor, R1-R6...Resistor, Dl, D2...Diode, Q...・NPN) transistor, E...DC voltage source, Vcc...DC power supply.
Claims (1)
て周波数変換して取り出す回路においてミこのＲＦコン
バータに入力される映像信号の同期信号の先立点のレベ
ルを第１の電位にクランプし、再生された変調信号が所
定レベル以下の期間だけ前記映像信号を第２の電位にク
リップする回路全前記ＲＦコンバータの入力側に設けて
なる映像信号再生装置のバズ音防止回路。In a circuit that converts the frequency of a video signal reproduced from an existing recording medium and takes it out using an RF converter, the level of the leading point of the synchronization signal of the video signal input to the RF converter is clamped to a first potential, and then reproduced. A buzz sound prevention circuit for a video signal reproducing apparatus, comprising a circuit for clipping the video signal to a second potential only during a period when the modulated signal is below a predetermined level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5385183U JPS59159085U (en) | 1983-04-11 | 1983-04-11 | Buzz noise prevention circuit for video signal playback equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5385183U JPS59159085U (en) | 1983-04-11 | 1983-04-11 | Buzz noise prevention circuit for video signal playback equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59159085U true JPS59159085U (en) | 1984-10-25 |
Family
ID=30184196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5385183U Pending JPS59159085U (en) | 1983-04-11 | 1983-04-11 | Buzz noise prevention circuit for video signal playback equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59159085U (en) |
-
1983
- 1983-04-11 JP JP5385183U patent/JPS59159085U/en active Pending
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