(a) Assuming R1 and R2 are so large that their current can be ignored compared to IBIAS in the circuit of Fig. P7.43, use Blackman’s formula to obtain an expression for Ro as a function of gm, ro, RS,...

(a) Assuming R1 and R2 are so large that their current can be ignored compared to IBIAS in the circuit of Fig. P7.43, use Blackman’s formula to obtain an expression for Ro as a function of gm, ro, RS, and , where 5 R1y(R1 1 R2). (b) Discuss the limiting cases R1→`, and R2→`; compare with known results. (c) Justify the fact that both Tsc and Toc are generally different from zero in this circuit.