Question

find all the DC collector currents of the 741 circuit. answers are shown in the table. just need to show the work for them all. please answer this question in full detail, showing all work neatly.

4. First self-study Sections 13.3.1 and 13.3.2 (pp. 1028- Table 13.1 DC Collector Currents of the 741 Circuit (uA) pp.1038), including Exercises and Examples. Then, find all 9.5 DC collector currents of the 741 circuit yourself, although 9.5 the answer is listed in Table 13.1. Show all your work in details. (20 pt+ Bonus 10 pt). 9.5 왜 19 Qs 19 010 19 e 730 212 730 Qiu 180 165 s 550 0i4 154 9 15.8- 0zo 154 021 0 0n 0 023 180 024 0 02 9.5 24 9.5 Qs 9.5 0i6 162 017 550 0 10.5

Answer 1

DC Analysis of the 741 Op Amp Bias circuitry: I_ref = V_CC - V_EE - 2V_BE/R_5 = 733 mu A I_2 = I_13B = 0.75 I_ref = 550 mu A I_3 = I_13 A = 0.25 I_ref = 180 mu A I_1 = I_10 = V_t/R_4 [ln (I_ref) - ln (I_1)] = 19 mu A Simplified Schematic of the 741 Op Amp with Idealized Biasing Input Stage Biasing of the 741 Op Amp I_A = i_8 = I_9 = 19 mu A I_A/2 = 9.5 mu A V_BE5 = V_t ln (9.5 mu A/I_SNPN) = 0.553 V I_SNPN = 5 fA V_BE5 = 0.555 V V_B5 = V_BE5 + R_1 . 9.5 mu A = 0.565 V I_R3 = I_7 = V_B5/R_3 = 11.3 mu A Darlington Gain Stage Biasing V_BE17 = V_t ln (550 mu A/I_SNPN) V_B17 = V_BE17 + R_8.550 mu A = 0.716 V I_R9 = V_B17/R_9 = 14.3 mu A I_B17 = 550 mu A/beta + 1