JPS647393A - Cooling control circuit for magnetic disk device - Google Patents
Cooling control circuit for magnetic disk deviceInfo
- Publication number
- JPS647393A JPS647393A JP16270187A JP16270187A JPS647393A JP S647393 A JPS647393 A JP S647393A JP 16270187 A JP16270187 A JP 16270187A JP 16270187 A JP16270187 A JP 16270187A JP S647393 A JPS647393 A JP S647393A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- unit
- temperature
- signal
- output
- 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
Abstract
PURPOSE:To reduce head operation waiting time by providing an oscillation circuit sending an output pulse whose frequency is increased as the temperature rise in the unit sealing and accommodating the magnetic head, a pulse count circuit and a timer circuit so as to allow them to control the cooling device thereby bringing the temperature in the unit to the saturation state quickly. CONSTITUTION:In order to saturate the temperature in the unit 6 sealing and accommodating the magnetic head 61 quickly, the cooling device 4 is controlled by a cooling control circuit 3. The circuit 3 is incorporated by an oscillation circuit 10, a timer circuit 25 comprising a counter circuit 20 and a cooling device drive circuit 30 receiving an ON signal from the circuit 25 to drive the device 4. The circuit 10 is started by a DC power output 8 to output a pulse 11. The frequency is made proportional to the detection temperature of a temperature sensor 63 in the unit 6. The circuit 20 counts the pulse 11 by a prescribed number to output a cooling ON signal 21 and a ready signal 22 to a host device and the circuit 30 is operated by the signal 21 to disconnect the AC power supply 1 and to connect the power supply 31 for driving the circuit 30.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16270187A JPS647393A (en) | 1987-06-30 | 1987-06-30 | Cooling control circuit for magnetic disk device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16270187A JPS647393A (en) | 1987-06-30 | 1987-06-30 | Cooling control circuit for magnetic disk device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS647393A true JPS647393A (en) | 1989-01-11 |
Family
ID=15759659
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16270187A Pending JPS647393A (en) | 1987-06-30 | 1987-06-30 | Cooling control circuit for magnetic disk device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS647393A (en) |
-
1987
- 1987-06-30 JP JP16270187A patent/JPS647393A/en active Pending
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