bharath_k
Junior Member level 3
Hello Everyone,
I am trying to design a current reference circuit. I want a current of about 20 pA current and the technology I am using is 180nm EM microelectronic.
Unfortunately I am running out of ideas. I have tried using a diode connect NFET with vgs=0 to use the leakage current and tried using it in a beta multiplier circuit. But again I see a lot of fluctuation in current for different corners.
If anyone has experience in designing current of this range in this technology kindly give me some suggestions. I have never designed a current reference and in sub treshold regions.
My knowledge is limited to beta reference circuit. Hence I am open to any kind of topologies and ideas.
Thanks,
Bharath
I am trying to design a current reference circuit. I want a current of about 20 pA current and the technology I am using is 180nm EM microelectronic.
Unfortunately I am running out of ideas. I have tried using a diode connect NFET with vgs=0 to use the leakage current and tried using it in a beta multiplier circuit. But again I see a lot of fluctuation in current for different corners.
If anyone has experience in designing current of this range in this technology kindly give me some suggestions. I have never designed a current reference and in sub treshold regions.
My knowledge is limited to beta reference circuit. Hence I am open to any kind of topologies and ideas.
Thanks,
Bharath