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hi,
You shoud use the negative voltage pump,
And the 'substrate' of the negative voltage nmos passgate must conect to the negative voltage,but
this 'substate of the passgate' is not the whole chip's gnd substate,it is generated by the trip pwell overlaped by deep-nwell.
Re: EPROM SENSE question
The FIG is following:
MP1 size is about 1u/20u.
V bias=2.2v, Vth MN1 is about=1v,
Icell1 is about=10uA,
The cell is not programmed.Vthcell=2v
But when the Vwl=5v,Vysel=5v, Vbias=2.2v
the Vsense is always about=4.0~4.5v, Confused!!
EPROM SENSE question
Hi,
ALL
I have a EPROM SENSE cirucit as follow,
------------VDD(5v)
|
_|
GND!--->| |_ PMOS w/l=1u/20u
|
|---sense line---->to a inverter
|...
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