jswon1001
Newbie level 3
hi~
I am a new one here and have a problem about calibre PEX,
when I design an opamp, use a rc compensation, the r value is 20k
with segment number 4, check the phase margin is OK, when the
layout was finished and run the LVS, the schematic and layout is matched.
then run the PEX and generate CALIBREVIEW to check the post simulation.
but when I check phase margin again the Opamp is no more stable. then I find
the schematic's compensation resistor is 20K with segments number 4, but in
the CALIBREVIEW the compensation resistor become 20K x 4. the resistor
value is four times larger than original one.
Do someone have the same problem with me and know how to solve it ?
I am a new one here and have a problem about calibre PEX,
when I design an opamp, use a rc compensation, the r value is 20k
with segment number 4, check the phase margin is OK, when the
layout was finished and run the LVS, the schematic and layout is matched.
then run the PEX and generate CALIBREVIEW to check the post simulation.
but when I check phase margin again the Opamp is no more stable. then I find
the schematic's compensation resistor is 20K with segments number 4, but in
the CALIBREVIEW the compensation resistor become 20K x 4. the resistor
value is four times larger than original one.
Do someone have the same problem with me and know how to solve it ?