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Where to connect the substract of nmos in power clamp?

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surianova

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power clamp

h all

for power clamp, it has its own gnd called gndesd. And the other analog block of the circuit use analog gnd called gnda. The question is where should connect the substract of nmos in power clamp. To gndesd or gnda?
 

Re: power clamp

Source and substrate should be connected to the same net...
Connect it to your GND ESD only....for seperation of your ESDGND to AnalogGND use Guardring or DNW...!!! it works...
after that....draw a PSUB on the different GNDs...!!!
 

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