For the transistors in the TTL circuit in Figure P17.28, the parameters are \(\beta_{F}=20\) and \(\beta_{R}=0\).

(a) Determine the currents \(i_{1}, i_{2}, i_{3}, i_{4}, i_{B 2}\), and \(i_{B 3}\) for the following input conditions: (i) \(v_{X}=v_{Y}=0.1 \mathrm{~V}\), and (ii) \(v_{X}=\) \(v_{Y}=5 \mathrm{~V}\).

(b) Show that for \(v_{X}=v_{Y}=5 \mathrm{~V}\), transistors \(Q_{2}\) and \(Q_{3}\) are biased in saturation.

Transcribed Image Text:

UX O Uy O Vcc=5 V R = 16.0 R = R3 = 2.0 2.2 iB2 Q2 IB3 Q3 RB = 1.5 k Figure P17.28 ww