Thin gate oxide output drive

Details Thin gate oxide output drive Thin gate oxide output drive

2005-03-22

2005-03-22

Nguyen, Long (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S333000, C326S081000

Reexamination Certificate

active

06870407

ABSTRACT:
An output driver circuit including first and second cascoded scaled P-channel devices coupled to first and second cascoded scaled N-channel devices. The P-channel devices are coupled together at a first node and between an output and a first source voltage having an elevated voltage level. The N-channel devices are coupled between the output and a reference source voltage. The first scaled P-channel device has a gate that receives a pull-up signal and the second scaled P-channel device has a gate coupled to a static voltage. The second P-channel device and the static voltage are configured to protect the first P-channel device from gate oxide breakdown when the first device is turned off. The first N-channel device has a gate receiving a voltage-limited pull-down signal and the second N-channel device has a gate receiving a lower voltage pull-down signal. The cascoded N-channel devices divide load and prevent hot carrier injection effects.

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