【菜鸟求助】如何在HSPICE下用AVANWAVES看增益？

thanksoar

如何绘出频率和差模增益AV的关系图？？

我使用公示生成器，用输出电压的除以减去输入电压的差，却提示我除数为0不能生成。。求教！

谢谢

fhchen2002

Question:
Did you use ".ac" card in your simulation deck?
Normally when one wants to check frequency response and differential gain, he/she uses ".ac" card.
He/she specifies one terminal of the signal source without AC source (say, the negative terminal), with another (say, the positive terminal) with AC source specified as 1.
Thus the phase shift at the output node (or the nodes he/she concerns) corresponds to the phase lag compared with the positive terminal of the differential circuit.
Then he/shes normally uses ".probe" card with "vdb(NODE_NAME)" and "vp(NODE_NAME)" as parameters.

Could you please post your simulation deck?

ralphtw

use log axis !