JPS6457406A - Reading and writing circuit for magnetic disk memory - Google Patents
Reading and writing circuit for magnetic disk memoryInfo
- Publication number
- JPS6457406A JPS6457406A JP21282887A JP21282887A JPS6457406A JP S6457406 A JPS6457406 A JP S6457406A JP 21282887 A JP21282887 A JP 21282887A JP 21282887 A JP21282887 A JP 21282887A JP S6457406 A JPS6457406 A JP S6457406A
- Authority
- JP
- Japan
- Prior art keywords
- boosting
- voltage
- reading
- time
- writing
- 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
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
Landscapes
- Digital Magnetic Recording (AREA)
Abstract
PURPOSE:To attain a satisfactory writing performance and reading performance with a single power source by providing a boosting circuit to stop an action at the time of a reading mode and transferring the voltage in accordance with a boosting voltage to the common electrode of a magnetic head at the time of a writing mode. CONSTITUTION:For a boosting circuit BST, by a transistor Q17 to receive a pulse signal formed by an oscillation circuit OSC and execute a switching action, a coil L is driven, a back electromotive force to generate a coil is smoothed and a boosting voltage Vcc' boosted to a supply voltage Vcc or above is formed. At the time of a reading mode, by a control signal, the inverse of WG made into the high level, a boosting action is stopped at the time of the reading mode. A voltage in accordance with the boosting voltage is transferred to the common electrode of a magnetic head and made into a bias voltage for writing. Thus, even when a single power source is used, a satisfactory writing performance can be maintained and the satisfactory reading performance can be obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21282887A JPS6457406A (en) | 1987-08-28 | 1987-08-28 | Reading and writing circuit for magnetic disk memory |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21282887A JPS6457406A (en) | 1987-08-28 | 1987-08-28 | Reading and writing circuit for magnetic disk memory |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6457406A true JPS6457406A (en) | 1989-03-03 |
Family
ID=16629035
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21282887A Pending JPS6457406A (en) | 1987-08-28 | 1987-08-28 | Reading and writing circuit for magnetic disk memory |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6457406A (en) |
-
1987
- 1987-08-28 JP JP21282887A patent/JPS6457406A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0128427A3 (en) | Semiconductor memory having circuit effecting refresh on variable cycles | |
EP0345065A3 (en) | Memories | |
ATE37248T1 (en) | INTEGRATED MAGNETOSTRICTIVE PIEZOELECTRIC MOS READING MAGNETIC HEAD. | |
TW374930B (en) | A RAM device having a self-refresh mode | |
JPS6431134A (en) | Driving method for pnpn optical thyristor | |
EP0276854A3 (en) | Semiconductor memory device with improved column selection scheme | |
JPS6457406A (en) | Reading and writing circuit for magnetic disk memory | |
JPS6457404A (en) | Reading and writing circuit for magnetic disk memory | |
EP0049462A3 (en) | Memory device | |
JPS5768680A (en) | Control circuit for direct current brake | |
JPS5764193A (en) | Control system of electric power source for audio output device | |
JPS59131115U (en) | Electromagnetic device drive circuit | |
JPS5224441A (en) | Low-power memory write mode storage | |
JPS55117729A (en) | Magnetic head | |
KR890017710A (en) | Semiconductor integrated circuit device | |
JPS6464152A (en) | Magneto-optical recording system | |
JPS54158196A (en) | Piezoelectric acoustic device | |
JPS648501A (en) | Timing circuit | |
JPS607688U (en) | switching power supply | |
JPS54123929A (en) | Magnetic head | |
JPS54128342A (en) | Electrostatic recorder | |
JPS57205892A (en) | Magnetic bubble cassette memory | |
JPS6127441U (en) | Power supply control circuit | |
JPS57133084A (en) | Magnetic fluid recording device | |
JPS59118003U (en) | Control signal output circuit |