Vladislav D wrote on Dec 7th, 2011, 10:04am:Are you sure that sources of all transistors are connected to ground? In this case, you don't have more than 2 transistors in any translinear loop in the circuit...It's not gonna work as a multiplier.
Hi Vladislav Sir,
Thanks for your reply,
Ya i have checked the ckt and all the nmos (middle line of 7 nmos FGMOS transistors)sources are connected to the ground and pmos(upper line of transistors) sources are connected to the vdd.
Upper transistors acts as current mirrors, middle line act as for multiplication and the lower two pmos acts as again current mirrors.
Further middle transistors count from left M1 ,M2 ....M7.
Here M2,M4,M5,M6 are the core elements, and M1,M3, M7 duplicate the currents of M2.M4 M6 respectively forming translinear loop.
IMi is the current tru Mi transistor where i=1 to 7
IM2 = IM1= Ib
IM4 = IM3 = Iin1+Ib
IM5 = (IM4 X IM6)/IM2 = (Iin 1 + Ib)(Iin2 + Ib)/Ib
IM6 = IM7 = Iin2 + Ib
If Iin1,Iin2 , Ib then outputs are
Iout1=IM1 + IM5
Iout2= IM3 +IM7
I hope i clarified my question now..
Hope now u r in better position to correct my ckt where its going wrong.
Thanks in advance.