Analog Sequencer/Sampler? (e)eprom
Martin Czech
czech at Micronas.Com
Fri Aug 11 19:34:32 CEST 2000
::: As far as I know, you are not going to be able to store an analog value
in a
:::bit of an (e)eprom. If perfermance is what you want, I don't think you be
Why not? Basically by writing ereasable devices you change
the threshold voltage of some NMOST. Be it Nordheim-Fowler
tunneling or hot electrons from drain.
I.e. you change the characteristic of an analogue device.
The read out value (drain current) is therefore an analog thing.
Of course, memory designers take a great pain in turning
this analog information into bits by elaborated read amplifiers,
but principally analog storage is possible.
What about Holtech chips? I think they store voice via these ideas.
Analog says nothing about discrete time or not.
Are BBDs digital??
There was a company in California ("San"), they proposed multi
level storage in FLASH, ie. each cell could have up to 256
different levels, this would mean 8 bits in the area of formerly one.
Of course, this was (too) demanding.
m.c.
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