karakurto
Newbie level 6
Small Signal Analysis
Hi,
When we try to find the small signal equivalent of a circuit, we apply AC and all the DC power supply nodes(like Vdd and Vss) pretend as if they are ground. At least in text books this is what is taught, but no explanation for that(or I couldn't find). I can't figure out the reason behind that? What are the physical or electrical explanations for that? I mean why DC nodes are accepted as gorund for ac analysis?
Thanks
Hi,
When we try to find the small signal equivalent of a circuit, we apply AC and all the DC power supply nodes(like Vdd and Vss) pretend as if they are ground. At least in text books this is what is taught, but no explanation for that(or I couldn't find). I can't figure out the reason behind that? What are the physical or electrical explanations for that? I mean why DC nodes are accepted as gorund for ac analysis?
Thanks