| 摘要 |
PURPOSE:To prevent completely positioning information from being out of phase by generating a position and an address signal in single-time writing. CONSTITUTION:A clock and a write start signal which are sent out externally are received, and the position signal Sp and address signal Sa are sent out of a position signal generating circuit 11 and address signal generating circuig 12 to an OR circuit 14 and put together into a composite signal Sig, which is inputted to an amplifier 15. On the other hand, a mode designating signal is sent out to a write gate generating circuit 13, which outputs a write gate signals WG1 or WG2 to the amplifier 15 on the basis of the mode designating signal. The amplifier 15 amplifies the composite signal Sig selectively only in a period wherein the signal synchronizes with the inputted WG1 or WG2, and sends out a write signal to a writing head 6 set at a prescribed position previously by a driving part to write corresponding information on a magnetic disk. |
