First,I was confused by the attached DSN file which was using an AD623 and a LM358 to build a simple voltage amplifier,the problem is:
1, AD623's output is -12.0757V when simulating!?
2,If I change LM358(SPICE Model) to LM358N(Schematic model).there is
no problem;
3,Even if I replace LM358 with SPICE model of TL081,OP07,CA3140,LM318, the amp works well.
So what's wrong with the design? and what's the principle of choosing SPICE model or Schematic model of the same device?
SPICE Model or Schematic Model?
SPICE Model or Schematic Model?
- Attachments
-
- GIF file
- amp.GIF (5.71 KiB) Viewed 530 times
more clearly to say
Maybe the picture can't show the issue clearly,let me attach the whole design.
Please note,in this design the output of AD623 is higher than 32V even when I short it's input to ground!
Please note,in this design the output of AD623 is higher than 32V even when I short it's input to ground!
- Attachments
-
- AD623amp.rar
- DC Voltage Amp
- (11.9 KiB) Downloaded 67 times