For the circuit of Fig. 5.25, assume that V CC = 15V, F (pnp) = 30,

For the circuit of Fig. 5.25, assume that V_CC= 15V, β_F(pnp) = 30, β_F(npn) = 150, I_S(npn) = 10^ˆ’14A, I_S(pnp) = 10^ˆ’15A, and for all devices V_BE(on)= 0.7 V, V_CE(sat)= 0.2 V. Assume that Q₅and Q₆are npn devices and the collector current in Q₇is 0.15 mA.

(a) Calculate the maximum positive and negative limits of V_o for R_L = 1 kΩ.

(b) Calculate quiescent currents in Q₁-Q₇ for V_o = 0 V.

(c) Calculate the maximum average output power (sine wave) that can be delivered to R_L if the maximum instantaneous dissipation in any device is 100 mW.

Calculate the corresponding value of R_L, and the peak currents in Q₃ and Q₄.

Fig. 5.25:

Transcribed Image Text:

Vce Q2 RL V. -Vec