Jenifer_gao
Member level 1
Hi All:
Except for using phase margin to juge the circuit stable or instable, can I use other simulation methods to obeserve the ossilation at the output . I am thinking I can use a step response simulation. because I think the instable system will give rise to a non-damping output signal. But I didn't see it with my instable amplifier, I observed the output signal damping gradually to the DC value instead. What's wrong with this method.
Another alternative way is to use a white noise source, but I don't know how to do it in HSPICE.
Any suggestion will be appreciated.
J
Except for using phase margin to juge the circuit stable or instable, can I use other simulation methods to obeserve the ossilation at the output . I am thinking I can use a step response simulation. because I think the instable system will give rise to a non-damping output signal. But I didn't see it with my instable amplifier, I observed the output signal damping gradually to the DC value instead. What's wrong with this method.
Another alternative way is to use a white noise source, but I don't know how to do it in HSPICE.
Any suggestion will be appreciated.
J
