The diference between GGMOS and GCMOS?

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sissi

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ggmos

What is the diference between GGMOS and GCMOS? Why is GGMOS using as input PAD ESD protection and GCMOS using as a clamp circuit between the power rail and vss?
reguards!
sissi
 

gcmos ggmos



There is no limitation the gcmos can not used as input pad esd protection circuit,
but it can influence the bandwith of the input signal.

Added after 2 minutes:

use gcmos clamp vcc to gnd, it can inprove the discharge efficiency from power track to gnd, at the same time it increase the protection ability of input pads.
 

gcmos


why influencing the bandwith of the input signal?
 

esd protection circuit

If the input signal frequency is too high, there would be too much power coupled to the gate of the ESD clamp MOS, then this MOS would be turned on to decrease the input impedance.
 

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