Shown in Fig. P6.16 is the ac equivalent of a bipolar differential amplifi er driving a load consisting of RL and CL. Let the BJTs have gm 5 1y(50 V), 0 5 250, ro 5 120 kV, rb 5 250 V, fT 5 400 MHz, C...

Shown in Fig. P6.16 is the ac equivalent of a bipolar differential amplifi er driving a load consisting of RL and CL. Let the BJTs have gm 5 1y(50 V), 0 5 250, ro 5 120 kV, rb 5 250 V, fT 5 400 MHz, C 5 0.45 pF, and Cs 5 1 pF. Moreover, let RB 5 2.0 kV, RC 5 10 kV, RL 5 50 kV, and CL 5 4.5 pF.

(a) Use the half-circuit technique to fi nd the lowfrequency value as well as the zero frequency and the two pole frequencies of adm(jf). What is the GBP of this amplifi er? (b) Use the half-circuit technique to estimate the low-frequency value as well as the zero frequency of acm(jf) if REE 5 3 MV and CEE 5 0.35 pF.