Ex 6.2: For the circuit in Figure 6.3, assume transistor parameters of

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Ex 6.2: For the circuit in Figure 6.3, assume transistor parameters of β = 150, VBE(on) = 0.7 V, and VA = 150 V. The circuit parameters are VCC = 5 V, VBB = 1.025 V, RB = 100 kΩ, and RC = 6 kΩ. (a) Determine the small-signal hybrid- π parameters gm, rπ, and ro. (b) Find the small-signal voltage gain Av = Vo/Vs. (Ans. (a) gm = 18.75 mA/V, rπ = 8 kΩ, ro = 308 kΩ; (b) Av = −8.17) EXERCISE PROBLEM

Ex 6.2: For the circuit in Figure 6.3, assume transistor parameters of β = 150, VBE(on) = 0.7 V, and VA = 150 V. The circuit parameters are VCC = 5 V, VBB = 1.025 V, RB = 100 kΩ, and RC = 6 kΩ. (a) Determine the small-signal hybrid- π parameters gm, rπ, and ro. (b) Find the small-signal voltage gain Av = Vo/Vs. (Ans. (a) gm = 18.75 mA/V, rπ = 8 kΩ, ro = 308 kΩ; (b) Av = −8.17) EXERCISE PROBLEM

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EXERCISE PROBLEM Ex 6.2: For the circuit in Figure 6.3, assume transistor parameters of

β = 150

,

V_{B E} (on) = 0.7 V

, and

V_{A} = 150 V

. The circuit parameters are

V_{C C} = 5 V

,

V_{B B} = 1.025 V, R_{B} = 100 k Ω

, and

R_{C} = 6 k Ω

. (a) Determine the small-signal hybrid-

π

parameters

g_{m}, r_{π}

, and

r_{o}

. (b) Find the small-signal voltage gain

A_{v} = V_{o} / V_{s}

. (Ans. (a)

g_{m} = 18.75 mA / V, r_{π} = 8 k Ω, r_{o} = 308 k Ω

; (b)

A_{v} = - 8.17)

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