loose-electron wrote on Aug 1st, 2006, 7:54pm:To quote the cited article:
"Measurements on a prototype chip, implemented in a 150nm logic process technology, validate the theories for two sub-1V MOS reference current generator circuits and show that 2X reduction in current variation is achievable across extremes of both process and temperature"
Not too terribly impressive. 2X of what? 40% down to 20% or?
To the best of what I know, the other opinions stated prior are accurate. Accurate voltage, not a problem. Accurate current requires a trim method or an external reference resistance. If anyone knows of something else, I would be very interested.
Jerry
So you can try Sengupta's method if you don't like Stephen's.
It is true that accurate current source is difficult to be implemented without trim or external reference resistance. However, good current source still can be achieved with some circuit skills.
ycj