mowiehowie
Junior Member
Offline
Posts: 26
|
Hi there. Im new here, and new on cmos analog design. so it goes: Im studying the frequency response of the common amplifiers such as common-source, source-follower, differential.. im using the cadence virtuoso with spectre. the question is: what is the right way to perform a .pz analyses? i mean, the results are too different from the expected by my manual math (using Razavi). its weird. im getting nervous. >:( for example on a CS stage, what I do is to put my amplifier on a convenient dc bias point , choose the pz analyses between the out (drain of the transitor) and the ground. it returns 2 poles and 1 zeroe that DONT match with my manual math, and, worst, DONT MATCH with the AC response plot.. thats it... i hope i was clear. i can speak in portuguese or in french too.
|