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..
Consider the circuits in figure 2.32. If we assume the transistors ar.pdf
1. 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.
