公开(公告)号：PL178323B1

公开(公告)日：2000-04-28

申请号：PL32033395

申请日：1995-10-21

Applicant: IBM

Inventor： COFFEY JEROME T ,  GOODMAN DALE E ,  POSS JOE M

IPC: G11B21/02 ,  G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/17 ,  G11B5/39 ,  G11B5/48 ,  G11B5/60 ,  G11B23/00

Abstract: A direct access storage device includes at least one disk mounted for rotation about an axis and having opposed disk surfaces for storing data. A magneto-resistive (MR) transducer head is mounted for movement across each respective disk surface for writing to and for reading data signals from the disk surface. Each MR transducer head includes a write element and a read element. A preamplifier, associated with the MR transducer head, amplifies read and write signals of the read element and the write element. A flex cable couples the read and write signals between the preamplifier and the MR transducer heads. The flex cable includes a common read return signal line for each sequential pair of the MR transducer heads.

公开(公告)号：SG53042A1

公开(公告)日：1998-09-28

申请号：SG1997002931

申请日：1997-08-13

Applicant: IBM

Inventor： POSS JOE M ,  SCHMERBECK TIMOTHY J

IPC: H03M1/12 ,  H03M1/36

Abstract: A high speed differential analog to digital converter (ADC) is provided. The high speed differential ADC includes a driver section, a comparator section and a decoder section. The driver section includes a pair of series connected resistor ladders with a positive phase voltage source connected at the top and bottom of one of the pair of series connected resistor ladders and a negative phase voltage source connected at the top and bottom of the other one of the pair of series connected resistor ladders; both the positive phase voltage source and the negative phase voltage source including a predetermined first DC voltage value. At least one additional positive phase voltage source is connected to the one of the pair of series connected resistor ladders and at least one additional negative phase voltage source is connected to the other one of the pair of series connected resistor ladders. The additional positive phase and negative phase voltage sources include a predetermined second DC voltage value.