MOS working at subthreshold region.

[boki]

Hi, All:

When simulation MOS at subthreshold region ( SPICE label it as cut-off), but
the total circuit function simulation is work, how is the accuracy in wafer?

Does the SPICE simulation is correct when MOS working at subthreshold region
but SPICE label it as cut-off region?

Thanks.

Boki.

 

[Kevin Aylward]

Hi, All:

When simulation MOS at subthreshold region ( SPICE label it as
cut-off), but the total circuit function simulation is work, how is
the accuracy in wafer?

Does the SPICE simulation is correct when MOS working at subthreshold
region but SPICE label it as cut-off region?

Depends on how good the model is, and what model the simulation is
using. If you have a decent BSim3v3 model it should be quite accurate.
However, for example, Spice MOS1 does not model subthreshold operation
at all.

Kevin Aylward
[email protected]
http://www.anasoft.co.uk
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.