Consider the circuits in figure 232 If we assume the transis

Consider the circuits in figure 2.32. If we assume the transistors are well described by the Schockley model and their respective S and B terminals are tied together, the two circuits are equivalent (i.e. I_dsi=I_ds2). If the body effect is considered, will I_Ds2 be equal to, greater than, or less than I_dsi? Consider only body effect: assume velocity saturation and mobility degradation effects are negligible. Explain.

Solution

As source(S) and Substrate terminals are tied together, hence VSB= potential difference between S and B=0.

Hence is no body effect.

Hence Id1= Id2.