Determine the unloaded voltage gain Î½ o /Î½ i and output resistance for the circuit of Fig.

Question:

Determine the unloaded voltage gain Î½_o/Î½_iand output resistance for the circuit of Fig. 4.58. Check with SPICE and also use SPICE to plot out the large-signal V_O-V_Itransfer characteristic for V_SUP= 2.5 V. Use SPICE to determine the CMRR if the current-source output resistance is 1 M„¦.

Figure 4.58:

+VSUP Q3 v,= Vo+v Q2 V = V, + v; 100 μΑ -VSUP