JPH01159239U - - Google Patents
Info
- Publication number
- JPH01159239U JPH01159239U JP5497888U JP5497888U JPH01159239U JP H01159239 U JPH01159239 U JP H01159239U JP 5497888 U JP5497888 U JP 5497888U JP 5497888 U JP5497888 U JP 5497888U JP H01159239 U JPH01159239 U JP H01159239U
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- rotating drum
- control device
- edge
- drum control
- 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
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
Description
第１図は本考案に係る回転ドラム制御装置の実
施例を示すブロツク図、第２図Ａ〜Ｆは動作状態
を示すタイムチヤート、第３図Ａ〜Ｄは従来例の
動作状態を示すタイムチヤートである。
１４……立上り検出回路、１５……立下り検出
回路、１８……基準位置検出回路、１９……遅延
回路、２１……遅延時間設定回路、２２……位相
比較器。
Fig. 1 is a block diagram showing an embodiment of a rotating drum control device according to the present invention, Figs. 2 A to F are time charts showing operating states, and Figs. 3 A to D are time charts showing operating states of a conventional example. It is. 14... Rise detection circuit, 15... Fall detection circuit, 18... Reference position detection circuit, 19... Delay circuit, 21... Delay time setting circuit, 22... Phase comparator.
Claims (1)
得られるＰＧパルスに基づく比較パルスのエツジ
と基準パルスのエツジとを位相比較することによ
つて回転ドラムのドラム制御を行う回転ドラム制
御装置であつて、 ＰＧパルスの立上り時と立下り時の中間時を検
出し、この中間時を基準として所定時間遅延する
ことによつて上記比較パルスを得るようにしたこ
とを特徴とする回転ドラム制御装置。[Scope of Claim for Utility Model Registration] Drum control of a rotating drum by comparing the phase of the edge of a reference pulse and the edge of a reference pulse based on a PG pulse obtained in response to the rotation of a rotating drum equipped with a magnetic head. The rotating drum control device is characterized in that the comparison pulse is obtained by detecting an intermediate time between the rise and fall of a PG pulse, and delaying by a predetermined time using this intermediate time as a reference. Rotating drum control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5497888U JPH0648594Y2 (en) | 1988-04-25 | 1988-04-25 | Rotating drum controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5497888U JPH0648594Y2 (en) | 1988-04-25 | 1988-04-25 | Rotating drum controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01159239U true JPH01159239U (en) | 1989-11-02 |
| JPH0648594Y2 JPH0648594Y2 (en) | 1994-12-12 |
Family
ID=31280887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5497888U Expired - Lifetime JPH0648594Y2 (en) | 1988-04-25 | 1988-04-25 | Rotating drum controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0648594Y2 (en) |
-
1988
- 1988-04-25 JP JP5497888U patent/JPH0648594Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0648594Y2 (en) | 1994-12-12 |
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