Question

Experiment 2: Good biasing Set up the circuit with R2 12 k2, R RE 1 k, and Vcc 15 V 39 k2, Rc = 2 k?. Circuit Analysis: Compute Ic, I, and VCE PSpice Simulation: a) Simulate the circuit with PSpice (bias point details only) and compare values of Ic, IB, VCE, and VBE from PSpice simulations with your analytical calculations. b) Rerun your PSpice simulations for temperatures of 0 and 60°C. Make a table of Ic IB, VCE, and VBE for the above temperatures and that of part a (which is for default temperature). Explain your observations. Compare your results with Experiment 1 Note: All transistor experiments in this Lab are done with 2N3904 NPN transistor. For your analytical analysis use the following values: 3200, v-100 V, V, 25 mV Ignore the early effect in bias calculations. t cc Experiment 1: Poor biasing Set up the circuit with Rg1.5 M, Rc=5 k, and VcC = 15 V. Circuit Analysis: Compute Ic, IB, and VCE PSpice Simulation: a) Simulate the circuit with PSpice (bias point details only) and compare values of Ic, In, VeE, and VBE from PSpice simulations with your analytical calculations. b) Rerun your PSpice simulations for temperatures of 0 and 60°C. Make a table of Ic I, VCE, and VBE for the above temperatures and that of part a (which is for default temperature). Explain your observations.

Answer 1

irauit diagram VcC RC R1 2N3904 A 3 RE R2 2N 390 4 Modal) VRE O.Ne foy Apply tevinen equivalent at node A V cc. R IS-2 Vtb 3.52 V 39+ 12 RI tR2 29 XI2 9.17K 51 eguiv alent di egromn Vi KYL Vt T Rm)+VBe+LERE

TaCRs ERE 2. 200 Lo 282 TBC1) 9s0 Ie( 1 K) 282 'a.82 13.4 MA 209.1 Vu89.E - Vc -VE VCE Ic.Re Vc V ce cak) S.36 9.6 4 V Vc 1s LERE 2-6ty 1K VE 2. 68 V V E 9. 6-2.68 VcE- Vc-VE VCEz 6.96V,

SRC 2RS Vcc 15V CiT Ceit Aalasis BIB CAPPY K VL - Vcc + IGRB + Vg E 4.3 14-3 RB c 00 X 9.S q.SLLA S 9 mA PB 9.SA VeE V CE LCXRC -SI VE 20V , VCE