Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of the amplifier
Reexamination Certificate
2008-12-12
2010-06-29
Wong, K. (Department: 2627)
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of the amplifier
C360S046000, C327S110000, C330S255000
Reexamination Certificate
active
07746591
ABSTRACT:
Methods and apparatus to provide dynamically biased write drivers for hard disk drive applications are described. According to one example, a hard disk drive write system includes a drive signal generator to receive data to be written to a hard disk drive platter and to generate drive signals including a boost signal. A drive circuit is configured to receive the drive signals and to generate currents for output to the transmission line based thereon, wherein the currents include a boost current. A variable bias circuit is configured to detect the boost signal generated by the drive signal generator and to vary a bias signal provided to the impedance matching circuit based on the detection of the boost signal. In such an example arrangement, the impedance matching circuit matches impedances between the drive circuit and the transmission line in response to the bias signal provided by the variable bias circuit.
REFERENCES:
patent: 7242544 (2007-07-01), Price et al.
patent: 2005/0237785 (2005-10-01), Venca et al.
Brady III Wade James
Stephens Dawn V.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
Wong K.
LandOfFree
Methods and apparatus to provide dynamically-biased write... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and apparatus to provide dynamically-biased write..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus to provide dynamically-biased write... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4238922