A TTL inverter prototype is shown in Figure 8 with the following value

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A TTL inverter prototype is shown in Figure 8 with the following values: VCC = 3 V, RB = 8 kΩ, and RC = 4 kΩ (12 points) Figure 8 . (a) When Vi = 0.15 V, Q2 is off and Q1 is in saturation with VBEssat = 0.75 V and VCEsat = 0.05 V. Calculate the available currents and the power dissipated in the circuit. (b) When vi = VccQ1 is at reversed active mode with βR = 0.25 and Q2 is in saturation mode with VBEsat = 0.75 V and VCEsat = 0.15 V. Calculate all the available currents and the total power of dissipation.

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A TTL inverter prototype is shown in Figure 8 with the following values:

V_{CC} = 3 V, R_{B} = 8 k Ω, and R_{C} = 4 k Ω

(12 points)

Figure 8 . (a) When

V_{i} = 0.15 V, Q_{2}

is off and

Q_{1}

is in saturation with

V_{B E s s a t} = 0.75 V

and

V_{CEsat} = 0.05 V

. Calculate the available currents and the power dissipated in the circuit. (b) When

v_{i} = V_{c c} Q_{1}

is at reversed active mode with

β_{R} = 0.25

and

Q_{2}

is in saturation mode with

V_{B E s a t} = 0.75 V

and

V_{CEsat} = 0.15 V

. Calculate all the available currents and the total power of dissipation.

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