(a) Sketch the high-frequency model of the pnp BJT of Fig. P6.3, and fi nd its element values if 0 5 75, VA 5 50 V, F 5 25 ps, rb 5 300 V, Cje0 5 0.5 pF, e 5 0.8 V, me 5 1y3, C0 5 0.3 pF, c 5 0.6 V,...

(a) Sketch the high-frequency model of the pnp BJT of Fig. P6.3, and fi nd its element values if 0 5 75, VA 5 50 V, F 5 25 ps, rb 5 300 V, Cje0 5 0.5 pF, e 5 0.8 V, me 5 1y3, C0 5 0.3 pF, c 5 0.6 V, and mc 5 1y2. What is the value of fT? (b) How do the various element values change if the 4.3-kV resistance is increased to 10 kV? What is the new value of fT?