Driver circuit

Details Driver circuit Driver circuit

2011-07-05

2011-07-05

Luu, An T (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

C327S309000, C361S021000, C361S091100

Reexamination Certificate

active

07973585

ABSTRACT:
A driver circuit including a pre-driver B1that operates by receiving operating power from a first power supply VDDI, and a main-driver B2that receives operating power from a second power supply VDDE, amplifies an output signal from the pre-driver B1, and outputs the amplified signal. It also includes a first switch B4between the first power supply VDDI and the pre-driver B1. It also includes a second switch B5between the second power supply VDDE and the main-driver B2. A overvoltage protection sequence circuit B3controls the On/Off states of the first switch B4and the second switch B5to controls the On/Off order of the pre-driver B1and the main-driver B2. By doing so, the overvoltage protection sequence circuit B3prevent an overvoltage from being applied to the driver circuit, especially to the main-driver B2.

REFERENCES:
patent: 6833746 (2004-12-01), Drapkin et al.
patent: 7411770 (2008-08-01), Logiudice et al.
patent: 2001/0024137 (2001-09-01), Miura
patent: 2001-257579 (2001-09-01), None

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