JPS61199704U - - Google Patents
Info
- Publication number
- JPS61199704U JPS61199704U JP8128185U JP8128185U JPS61199704U JP S61199704 U JPS61199704 U JP S61199704U JP 8128185 U JP8128185 U JP 8128185U JP 8128185 U JP8128185 U JP 8128185U JP S61199704 U JPS61199704 U JP S61199704U
- Authority
- JP
- Japan
- Prior art keywords
- bias
- circuit
- level
- oscillator
- bias current
- 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
- 238000013500 data storage Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Description
第１図はこの考案のテープレコーダを示す構成
図、第２図はこの考案のテープレコーダを説明す
るためのバイアス電流対レスポンスを表わす図、
第３図は従来のテープレコーダを示す構成図、第
４図は従来のバイアス電流対レスポンスを表わす
図である。
１０……レベル検知回路、１１……制御回路、
１２……Ｄ―Ａ変換回路、１３……バイアス発振
器、１４……基準発振器、１５……サンプルデー
タ記憶回路、１６……レベル比較回路。
FIG. 1 is a block diagram showing the tape recorder of this invention, and FIG. 2 is a diagram showing bias current versus response to explain the tape recorder of this invention.
FIG. 3 is a block diagram showing a conventional tape recorder, and FIG. 4 is a diagram showing a conventional bias current versus response. 10...Level detection circuit, 11...Control circuit,
12...DA conversion circuit, 13...Bias oscillator, 14...Reference oscillator, 15...Sample data storage circuit, 16...Level comparison circuit.
Claims (1)
自動設定可能にした３ヘツド式テープレコーダに
おいて、バイアスを自動設定するための基準信号
発振器と、バイアス電流を供給するバイアス発振
器と該バイアス発振器のレベルをコントロールす
るＤ―Ａ変換回路と、バイアス調整中に再生レベ
ルを検知するレベル検知回路と、磁気テープのバ
イアス値のデータを記憶しているデータ記憶回路
と、該レベル検知回路の出力信号と該データ記憶
回路のデータ信号と該レベル出力回路の比較出力
でバイアス電流値を自動設定することを特徴とす
るテープレコーダ。 In a three-head tape recorder that can automatically set a bias current suitable for the magnetic tape used, a reference signal oscillator for automatically setting the bias, a bias oscillator that supplies the bias current, and the level of the bias oscillator are controlled. A D-A conversion circuit, a level detection circuit that detects the playback level during bias adjustment, a data storage circuit that stores bias value data of the magnetic tape, an output signal of the level detection circuit, and the data storage circuit. A tape recorder characterized in that a bias current value is automatically set based on the data signal and the comparative output of the level output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8128185U JPS61199704U (en) | 1985-05-30 | 1985-05-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8128185U JPS61199704U (en) | 1985-05-30 | 1985-05-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61199704U true JPS61199704U (en) | 1986-12-13 |
Family
ID=30627921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8128185U Pending JPS61199704U (en) | 1985-05-30 | 1985-05-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61199704U (en) |
-
1985
- 1985-05-30 JP JP8128185U patent/JPS61199704U/ja active Pending