Read/Write Electronics Front-End Systems for Hard Disk Drives

Klaassen, K.B.; Contreras, J.T.; Peppen, J.C.L. van

doi:10.1109/tmag.2003.821181

Cited by 13 publications

(3 citation statements)

References 6 publications

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“…In practice, the proper Z c of the line is determined from impedance of terminated loads, i.e., the recording head and the R/W driver depending on each HDD model. This is known as impedance matching to avoid reflection and distortion of signals .…”

Section: Resultsmentioning

confidence: 99%

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The dimensional effects of windowing on crosstalk for high speed hard disk drive interconnects

Prachumrasee

Kaewrawang

Siritaratiwat

et al. 2013

Int J RF and Microwave Comp Aid Eng

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As the areal density rapidly changes, the signal reflection increases. In order to avoid the reflection between a magnetic recording head and a read/write driver on hard disk drive interconnects (HDDIs), the windowing technique is used to keep low insertion loss and it causes the higher crosstalk between lines. In this work, the crosstalk on idealized HDDI with windowing is investigated. The crosstalk represented by the scattering parameters calculated by using the full wave simulation software based on finite integral technique. From the results, the improvement of insertion loss and transmission bandwidth (23 dB bandwidth) can be found when the window percentage is increased. For the 90% windowed structure, these are improved as 4.27 dB at 1 GHz and 4.53 GHz comparing with the conventional structure, respectively. Besides, the crosstalk increases with the increasing of window percentage. However, it can be suppressed up to 5.68 dB in a range of 0.24-1 GHz when the window percentage is 90%. Furthermore, the 90% of windowed structure with 8 mm window pitch possess the lowest crosstalk about 30.22 dB in a range of 0.32-6.4 GHz. In addition, the placing position of windows in a reference plane with a half of the rest length at both ends should be avoided because it increases both crosstalk and insertion loss.

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Section: Resultsmentioning

confidence: 99%

“…As the rapidly increasing of data rate, a signal integrity issue plays an important role. Consequently, an insertion loss of transmission lines should be kept low to entirely maintain the detail of data signals transferred between the recording head and the R/W driver .…”

Section: Introductionmentioning

confidence: 99%

The dimensional effects of windowing on crosstalk for high speed hard disk drive interconnects

Prachumrasee

Kaewrawang

Siritaratiwat

et al. 2013

Int J RF and Microwave Comp Aid Eng

View full text Add to dashboard Cite

show abstract

“…The preamplifier/write-driver is a small predominantly-analog chip typically bonded directly onto the flex circuit on the actuator and placed as close to the read/write heads as possible [11]. The preamplifier portion provides bias to the read head and must sense and amplify the tiny readback voltages without adding much additional noise.…”

Section: Disk Drive Electronicsmentioning

confidence: 99%