sheldon
|
Almitra,
The testbench may not be appropriate for the measurmements that you are trying to make. Try using a vcvs to close the loop and setup a the dc operating point.
Ef 3 0 8 0 1.0 <-- If I remember the syntax correctly
If you have access to Ken's simulation book, there is additional discussion on testbench setup and amplifier measurement.
BTW, In general, when using the open loop technique, you need to run a dc sweep first to select a dc voltage for vinn that results in the desired the output dc level. In this case, it appears that the choice of vinn=1.5V results in the output being saturated at the negative supply. The usual source of this behavior is the systematic offset voltage of the amplifier.
Best Regards,
Sheldon
|