Consider the input stage of the 741 op-amp in Figure 13.4(b).

(a) Assume the input voltages are \(V_{1}=0\) and \(V_{2}=+15 \mathrm{~V}\). Consider the B-E voltage of each transistor and determine which transistor acts as the protection device.

(b) Repeat part (a) for \(V_{1}=-15 \mathrm{~V}\) and \(V_{2}=0\).

Figure 13.4(b):-

Transcribed Image Text:

V = 15 V o + + = 0.7 V =0.7 V V Q2 13.6 V Q3 Q4 (b) V2