Maker Pro
Simulating (absolutely) symmetrical circuits

Simulating (absolutely) symmetrical circuits

Harald Kapp

Moderator
Moderator
Nov 17, 2011
13,700
Joined
Nov 17, 2011
Messages
13,700
Harald Kapp submitted a new resource:

Simulating (absolutely) symmetrical circuits - Ideal components lead to unexpected simulation results

Other than a real circuit, SPICE deals with ideal components. In a completely symmetrical circuit this may lead to unexpected behavior. For example a simple astable multivibrator may not vibrate at all but assume a stable state. The circuit in figure 2.10-1 simulates a stable 39.7 mV on the out-pin without any tendency to oscillate at all.
Figure 2.10-1 symmetrical astable multivibrator is stable
You may force SPICE to assume a defined initial state for the simulation using the .IC directive...

Read more about this resource...
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,510
Joined
Jan 21, 2010
Messages
25,510
I would change "Other than a real circuit," to "Unlike a real circuit,"

Is another option to slightly alter some of the components (for example to make 1 capacitor 1% lower, or to increase a resistor slightly?
 
Top