The basic bias circuit of the output transistors of the 741 op-amp is shown in Figure P13....

The basic bias circuit of the output transistors of the 741 op-amp is shown in Figure P13.23. (a) Sketch the small-signal equivalent circuit, (b) Assuming VA = 50V and using the parameters described in Example 13.3, determine the equivalent small-signal resistance Req = υx/ix.