Greetings everyone
So where shoul i start... I am making a course project at my univercity and im having problems with it. So here is the deal:
I've got a scheme asembled (chebyshev filter) in Orcad like this one:
Transistor models are:
http://www.mosis.com/cgi-bin/cgiwrap/umosis/swp/params/ibm-035/t75w_5hpe_4lm-par...As we can see Vt0 for P type transostor is -0.4450562V, and for N type 0.5551144 V.
Top M5 and M6 transistors are "load" and must act like resistors. Their L is 35um and W is 0.7um (100/2 ratio).
Middle transistors M3 and M4 are "ladder" and their L is 0.35um, W is 7um (20/1 ratio).
Lowest transistors M1 and M2 are "in" transistors and their L is 0.7um and W is 7um (20/2 ratio).
This is made according to the datasheet i got, iput it in atached archive as Filtrai.pdf, there is also a orcad project. Inside is a charakteristika.png picture, this is what i get in output (AC sweep, from 10Hz to 10GHz, 20pointds decade). So when i make c1 and c2 31.5pF and 30pF, i dont get the peak as i get in charakteristika.png...
Why is that? How can i meke it apear? And in pdf page 422 fig. 5 i need to get currents ~80uA but as u can see i get only in nA, how can i achieve uA?
Thank you so much for your help!