In my circuit i have output currents as Iout1 and Iout2 from two places.What i want is Iout=Iout1-Iout2.
This is my circuit for this.I urge you all to correct the circuit if it is wrong .I have used current mirrors as shown in the image.
Well the ckt shown in the image is not the actual ...i have redrawn it..since it is a part of a big circuit..so ur second and third point (coorected) is
2) the widths are sAME ...
3) they are properly connected to vdd.(its my mistake of not drawing it properly here,original ckt is as per the rules)
4) V7 is neceesaary to me since i am going to use the ckt below threshold so i will connect there -0.5 V for vss.
in your last point u said to connect cccs + resistor.. Thanks for the suggestion..Further what according to you should be the
value of resistor for measuring the currents around of 5nA. and
the current gain be of cccs as 1 is enough or not.