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发表于 2008-11-30 00:24:53
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第三篇:
ABSTRACT
To mitigate the radio-frequency (RF) performance degradation caused by
electrostatic discharge (ESD) protection device, low capacitance (low-C)
design on ESD protection device is a solution. With the smaller layout
area and small parasitic capacitance under the same ESD robustness,
silicon-controlled rectifier (SCR) device has been used as an effective
on-chip ESD protection device in RF ICs. In this paper, the modified
lateral SCR (MLSCR) with the waffle layout structure is studied to
minimize the parasitic capacitance and the variation of the parasitic
capacitance within ultra-wide band (UWB) frequencies. With the
minimized parasitic capacitance, the degradation on RF circuit
performance can be reduced. Besides, the fast turn-on design on MLSCR
without extra parasitic capacitance from the trigger circuit adding on the
I/O pad is also investigated in this work. |
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