Output voltage slew rate control in hard disk motor drive

Details Output voltage slew rate control in hard disk motor drive Output voltage slew rate control in hard disk motor drive

2010-08-27

2011-10-25

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Slope control of leading or trailing edge of rectangular or...

C326S082000, C326S083000, C326S086000

Reexamination Certificate

active

08044693

ABSTRACT:
A driver circuit includes a first transistor having a first node coupled to a high supply voltage and a second node coupled to an output node, wherein the first transistor passes the high supply voltage to the output node based on a first gate voltage on a gate of the first transistor. The driver circuit also includes a second transistor having a first node coupled to a low supply voltage and a second node coupled to the output node of the driver circuit, wherein the second transistor passes the low voltage to the output node based on a second gate voltage on a gate of the second transistor. The driver circuit further includes a logic block configured to control a slew rate of an output signal Vout at the output node by controlling a slew rate of the first gate voltage and controlling a slew rate of the second gate voltage.

REFERENCES:
patent: 5877647 (1999-03-01), Vajapey et al.
patent: 7498844 (2009-03-01), Rho
patent: 2005/0105294 (2005-05-01), Cho et al.

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