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4. Lab VIII: Experiment VII The Bipolar Junction Transistor (BJT) Characteristics The bipolar junction transistor (BJT) is a
(a) Test results for variable Vcc, DC power supply. Test (1) Vna3.0 volts. Note units for Ic and I or use lc-(Vcc-VaVRC, Ia-
(iii) Determine saturation and active regions (iv) Hence obtain B graphically (use two different VCEs). (b) Base characteris
Calculate and complete the tables above On the same graph, for each VcE setting plot VaE versus ig. (ii) Comment on your resu
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Answer #1

Collector Characteristics

Test 1: VBB=3.0 volt

Vcc(v) 0 0.5 1 2 3 4 6 8 10 12 VCE(v) 0 0.02 0.03 0.04 0.04 0.05 0.05 0.06 0.06 0.07 VRB(v) 2.33 2.33 2.33 2.33 2.33 2.29 2.28 2.27 2.27 2.26 IC(mA) 0 0.48 0.97 1.96 2.96 3.95 5.95 7.94 9.94 11.93 IB(mA) 0.233 0.233 0.233 0.233 0.233 0.229 0.228 0.227 0.227 0.226

Test 2: VBB=2.0 volt

Vcc(v) 0 0.5 1 2 3 4 6 8 10 12 VCE(v) 0 0.03 0.04 0.05 0.06 0.06 0.07 0.07 0.09 0.09 VRB(v) 1.35 1.34 1.33 1.32 1.31 1.3 1.29 1.28 1.27 1.27 IC(mA) 0 0.47 0.96 1.95 2.94 3.94 5.93 7.93 9.91 11.91 IB(mA) 0.135 0.134 0.133 0.132 0.131 0.13 0.129 0.128 0.127 0.127

Test 3: VBB=1.0 volt

Vcc(v) 0 0.5 1 2 3 4 6 8 10 12 VCE(v) 0 0.05 0.06 0.08 0.09 0.11 0.12 0.15 0.24 1.24 VRB(v) 0.39 0.36 0.35 0.33 0.32 0.31 0.3 0.29 0.29 0.29 IC(mA) 0 0.45 0.94 1.92 2.91 3.89 5.88 7.85 9.76 10.76 IB(mA) 0.039 0.036 0.035 0.033 0.032 0.031 0.03 0.029 0.029 0.029

Test 4: VBB=0 volt

Vcc(v) 0 0.5 1 2 3 4 6 8 10 12 VCE(v) 0 0.5 1 2 3 4 6 8 10 12 VRB(v) 0 0 0 0 0 0 0 0 0 0 IC(mA) 0 0 0 0 0 0 0 0 0 0 IB(mA) 0 0 0 0 0 0 0 0 0 0

Base Characteristics

VCC=8 volt

VBB(v) 0 0.5 1 2 3 4 6 8 10 12
VCE(v) 8 8 0.15 0.07 0.06 0.05 0.04 0.03 0.03 0.02
VBE(v) 0 0.5 0.71 0.72 0.73 0.73 0.73 0.73 0.73 0.73
IC(mA) 0 0 7.85 7.93 7.94 7.95 7.96 7.97 7.97 7.98
IB(mA) 0 0 0.029 0.128 0.227 0.327 0.527 0.727 0.927 1.127

VCC=4volt

VBB(v) 0 0.5 1 2 3 4 6 8 10 12
VCE(v) 0.4 0.4 0.11 0.06 0.05 0.04 0.04 0.03 0.03 0.03
VBE(v) 0 0 0.68 0.7 0.71 0.71 0.71 0.71 0.71 0.71
IC(mA) 3.6 3.6 3.89 3.94 3.95 3.96 3.96 3.97 3.97 3.97
IB(mA) 0 0.05 0.032 0.13 0.229 0.329 0.529 0.729 0.929 1.129

VCC=0 volt

VBB(v) 0 0.5 1 2 3 4 6 8 10 12
VCE(v) 4 4 4 4 4 4 4 4 4 4
VBE(v) 0 0.5 0.61 0.65 0.67 0.68 0.69 0.7 0.7 0.7
IC(mA) -4 -4 -4 -4 -4 -4 -4 -4 -4 -4
IB(mA) 0 0 0.039 0.135 0.233 0.332 0.531 0.73 0.93 1.13

Collector char. For fixed iB-20 233 mA V CE(v) lo lo.0 10.0310.04 ) IL (MA) 0 (0.480.97/1.96) T(mo 1.5 - Active I tsat i 0.5

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