Write-to-read coupling

The design of the interconnect between the read/write heads and the read/write electronics in a disk drive is constrained by the head suspension. The resulting narrow spacing of the write and read lines and the open-line type interconnect that must be used can cause a considerable write-to-read coup...

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Bibliographic Details
Published inIEEE transactions on magnetics Vol. 38; no. 1; pp. 61 - 67
Main Authors Klaassen, K.B., van Peppen, J.C.L., Xinzhi Xing
Format Journal Article Conference Proceeding
LanguageEnglish
Published New York, NY IEEE 01.01.2002
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Applied sciences
Assembly
Couplings
Disk drives
Disk recording
Earth Observing System
Electronics
Exact sciences and technology
Exact solutions
Frequency spectrum
Information storage
Joining
Magnetic device characterization, design, and modeling
Magnetic devices
Magnetic heads
Magnetic recording
Magnetic separation
Magnetism
Mathematical analysis
Preamplifiers
Propagation modes
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Studies
Voltage
Writing
Design
Recording head
Theoretical study
Magnetic head
Magnetic disk
Modeling
Read head
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Summary:The design of the interconnect between the read/write heads and the read/write electronics in a disk drive is constrained by the head suspension. The resulting narrow spacing of the write and read lines and the open-line type interconnect that must be used can cause a considerable write-to-read coupling. In storage devices operating at high data rates, the transient voltages on the read line while writing can be large enough to cause electrical overstress of the read head and slow down the recovery from overdrive of the read amplifier. This paper analyzes the coupling mechanisms (magnetic and electrical) for the two write line propagation modes (differential and common). For the low-end of the frequency spectrum, this leads to closed-form lumped parameter expressions. To include the high end of the spectrum, network simulations are presented using distributed parameter coupling as well as distributed parameter write and read lines. The measurement of the severity of write-to-read coupling is discussed. Finally, the paper presents various ways of reducing this write-to-read coupling.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2002.988912