JPS623173U - - Google Patents
Info
- Publication number
- JPS623173U JPS623173U JP9418685U JP9418685U JPS623173U JP S623173 U JPS623173 U JP S623173U JP 9418685 U JP9418685 U JP 9418685U JP 9418685 U JP9418685 U JP 9418685U JP S623173 U JPS623173 U JP S623173U
- Authority
- JP
- Japan
- Prior art keywords
- characteristic
- modulated
- switching pulse
- head
- brightness signal
- 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
- 230000001960 triggered effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Television Signal Processing For Recording (AREA)
Description
第１図はこの考案のビデオテープレコーダの１
実施例のブロツク図、第２図は第１図の共振回路
の詳細な結線図、第３図は第１図のリミツタアン
プの増幅利得の周波数特性図、第４図ａ〜ｄは第
１図の動作説明用の波形図、第５図ａ，ｂは反転
現象説明用の輝度信号の波形図である。
１，２……ヘツド、５，６……イコライザ回路
、７，８……共振回路、１０……リミツタアンプ
、１４……モノマルチ。
Figure 1 shows one of the videotape recorders of this invention.
2 is a detailed wiring diagram of the resonant circuit shown in FIG. 1, FIG. 3 is a frequency characteristic diagram of the amplification gain of the limiter amplifier shown in FIG. 1, and FIGS. FIGS. 5A and 5B are waveform diagrams of a luminance signal for explaining an inversion phenomenon. 1, 2...Head, 5, 6...Equalizer circuit, 7, 8...Resonance circuit, 10...Limiter amplifier, 14...Mono multi.
Claims (1)
再生毎にヘツドを切換え、記録時に、輝度信号を
ＦＭ変調して記録するとともに、再生時に、再生
されたＦＭ変調輝度信号をイコライザ回路、リミ
ツタアンプを介してＦＭ復調器に入力し、該復調
器により前記ＦＭ変調輝度信号を復調するビデオ
テープレコーダにおいて、前記ヘツド切換パルス
のトリガにより前記再生されたＦＭ変調輝度信号
のほぼ垂直同期部分の間に特性切換パルスを形成
する特性切換パルス形成手段と、前記特性切換パ
ルスが入力される間前記イコライザ回路の共振特
性または前記リミツタアンプの利得特性あるいは
前記両特性を高域伸長特性に切換える特性切換手
段とを備えたビデオテープレコーダ。 Recording of one field by head switching pulse,
The head is switched for each playback, and during recording, the brightness signal is FM modulated and recorded. During playback, the reproduced FM modulated brightness signal is input to an FM demodulator via an equalizer circuit and a limiter amplifier, and the demodulator outputs the FM modulated brightness signal. In the video tape recorder for demodulating the FM modulated luminance signal, characteristic switching pulse forming means for forming a characteristic switching pulse during substantially the vertical synchronization portion of the reproduced FM modulated luminance signal triggered by the head switching pulse; A video tape recorder comprising characteristic switching means for switching the resonance characteristic of the equalizer circuit, the gain characteristic of the limiter amplifier, or both characteristics to a high frequency extension characteristic while a characteristic switching pulse is input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9418685U JPS623173U (en) | 1985-06-20 | 1985-06-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9418685U JPS623173U (en) | 1985-06-20 | 1985-06-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS623173U true JPS623173U (en) | 1987-01-09 |
Family
ID=30652523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9418685U Pending JPS623173U (en) | 1985-06-20 | 1985-06-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS623173U (en) |
-
1985
- 1985-06-20 JP JP9418685U patent/JPS623173U/ja active Pending
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