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Determine the values of rb1 and rc1
Course:- Electrical Engineering
Reference No.:- EM131236494

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Consider the modified Schottky TTL NAND gate shown in Figure. The current gain of all transistors is β = 20.

(a) Assume vX = vY = vZ = logic 1 and assume two similar type load circuits are connected to the output. The transistor Q2 is biased in saturation with iB2 = 0.1 mA and iC2 = 0.2 mA. Determine the values of RB1 and RC1.

(b) Using the results of part (a), and assuming vX = 0.4 V and v= vZ = 1.8 V, determine vB1, vB2, vO , and all base and collector currents. Assume two similar type load circuits are connected to the output.

(c) Assume vX = vY = vZ = logic 1 and assume four similar type load circuits are connected to the output. Using the results of part (a), determine vB1, vB2, vO , and all base and collector currents.

(d) Determine the maximum fanout for a low output state.

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