JPS6248006U - - Google Patents
Info
- Publication number
- JPS6248006U JPS6248006U JP14023585U JP14023585U JPS6248006U JP S6248006 U JPS6248006 U JP S6248006U JP 14023585 U JP14023585 U JP 14023585U JP 14023585 U JP14023585 U JP 14023585U JP S6248006 U JPS6248006 U JP S6248006U
- Authority
- JP
- Japan
- Prior art keywords
- demodulation circuit
- heads
- data
- pll
- speed
- 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
- 230000008929 regeneration Effects 0.000 claims 1
- 238000011069 regeneration method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
Description
第１図は、本考案の高速再生復調回路の一実施
例のブロツク図であり、第２図は、高速再生時の
トラツクに対するヘツドの摺接を説明する図であ
り、第３図は、記録されたアジマス角度の違いに
より再生信号が変化することを説明する図である
。
１：ＰＬＬ回路、７：アナログスイツチ、８：
データ復調回路、Ｖ１，Ｖ２：基準信号、ＴＡ：
Ａのアジマス角度で記録されたトラツク、ＴＢ：
Ｂのアジマス角度で記録されたトラツク、ＨＡ：
Ａヘツドの摺接軌跡、ＨＢ：Ｂヘツドの摺接軌跡
、ａ：Ａヘツドで信号を横切る間隔、ｂ：Ｂヘツ
ドで信号を横切る間隔。
FIG. 1 is a block diagram of one embodiment of the high-speed reproduction demodulation circuit of the present invention, FIG. 2 is a diagram illustrating the sliding contact of the head with respect to the track during high-speed reproduction, and FIG. FIG. 4 is a diagram illustrating how a reproduced signal changes depending on a difference in azimuth angle. 1: PLL circuit, 7: Analog switch, 8:
Data demodulation circuit, V1, V2: reference signal, TA:
Track recorded at azimuth angle of A, TB:
Track recorded at azimuth angle B, HA:
A sliding contact trajectory of head A, HB: sliding contact trajectory of B head, a: interval at which the A head crosses the signal, b: interval at which the B head crosses the signal.
Claims (1)
ス角度を相違させてドラムに配設された２個のヘ
ツドを前記テープに記録されたトラツクに対して
斜めに摺接させ、前記ヘツドで再生される再生信
号をデータ復調回路とＰＬＬ回路に入力させ、こ
のＰＬＬ回路の出力により前記データ復調回路で
前記再生信号からデータを読み取り復調データと
して出力する高速再生復調回路において、前記２
個のヘツドを切り換えるヘツド切換信号によつて
前記ＰＬＬ解路に与えられる基準信号を切り換え
るようにしたことを特徴とする高速再生復調回路
。 The tape is run at a higher speed than normal playback, and two heads disposed on the drum are brought into sliding contact diagonally with respect to the track recorded on the tape at different azimuth angles, and the track is played back by the heads. In the high-speed reproduction demodulation circuit, the reproduction signal is input to a data demodulation circuit and a PLL circuit, and the data demodulation circuit reads data from the reproduction signal according to the output of the PLL circuit and outputs it as demodulated data.
1. A high-speed regeneration demodulation circuit characterized in that a reference signal applied to said PLL solution path is switched by a head switching signal for switching between two heads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14023585U JPH0725902Y2 (en) | 1985-09-13 | 1985-09-13 | High-speed reproduction demodulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14023585U JPH0725902Y2 (en) | 1985-09-13 | 1985-09-13 | High-speed reproduction demodulation circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6248006U true JPS6248006U (en) | 1987-03-25 |
| JPH0725902Y2 JPH0725902Y2 (en) | 1995-06-07 |
Family
ID=31046892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14023585U Expired - Lifetime JPH0725902Y2 (en) | 1985-09-13 | 1985-09-13 | High-speed reproduction demodulation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0725902Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63188867A (en) * | 1987-01-31 | 1988-08-04 | Kenwood Corp | Clock signal reproducing device |
| JPS63317965A (en) * | 1987-06-20 | 1988-12-26 | Sanyo Electric Co Ltd | Rotary head type digital magnetic reproducing device |
-
1985
- 1985-09-13 JP JP14023585U patent/JPH0725902Y2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63188867A (en) * | 1987-01-31 | 1988-08-04 | Kenwood Corp | Clock signal reproducing device |
| JPS63317965A (en) * | 1987-06-20 | 1988-12-26 | Sanyo Electric Co Ltd | Rotary head type digital magnetic reproducing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0725902Y2 (en) | 1995-06-07 |
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