Title:
【発明の名称】磁気ディスク装置のリード・ライトアンプ回路
Document Type and Number:
Japanese Patent JP2595806
Kind Code:
B2
Abstract:
A read/write amplifier provides a magnetic disk unit capable of reducing variations of the bias voltage. An output stage provides a DC bias circuit for the read signal and a circuit for producing a high impedance for the read signal. A switch circuit is in a closed circuit operation only when a chip select signal is received. The output stage provides a switching order to connect a constant current circuit to the amplifier circuit at read time and to connect the DC bias circuit at the write time.
Inventors:
Enoki Hiroyuki
Tatsuo Nishizawa
Tatsuo Nishizawa
Application Number:
JP30656090A
Publication Date:
April 02, 1997
Filing Date:
November 13, 1990
Export Citation:
Assignee:
NEC
International Classes:
G11B5/09; G11B5/02; G11B5/03; G11B19/02; G11B20/10; H03F3/72; G11B5/00; (IPC1-7): G11B5/09
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)