Can you please answer this question. Comment on the observed vs predicted values for the diode operating point.

Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Can you please answer this question.

Comment on the observed vs predicted values for the diode operating point.

10
Current (mA) - DIODE
un
LD
Insert your measured and calculated values as well as your curves below
From diode model
on load line
0.84 mA
1 =
Diode Current I
Diode Voltage V₁
Ideal vs Non-ideal Diode Operation, with Loadline
● Ideal values loadline ● non-ideal values
0.2
Vab (V)
1.5
0
= 1.5 mA
In-circuit
measurement in (a)
0.4
For the load line
1.5 V power supply, use a 1 kn resistor
1.5
1k
I (mA)
0
1.5
0.6
0.8
Voltage (V) - Diode
≈ 0.6 V
1.2
1
V (V)
0.39
0.4
0.449
0.482
0.504
0.554
0.616
0.652
0.673
1.6
From actual diode
curve on load line
1.01 mA
≈ 0.616 V
Vd
I (mA)
0.008603
0.01066
0.031007
0.0625
0.1015
0.29
1.01
2.024
3.0033
6.0009
0.714
Actual 1N4148 diode
Comment on the observed vs predicted values for the diode operating point.
0.6
0.63
0.64
0.66
0.66
0.67
0.68
0.69
0.69
0.7
0.71
0.71
0.71
0.72
Id (mA)
0.72
0.73
0.73
0.73
ideal diode
0.84
1.39
1.85
2.37
2.82
3.29
3.86
4.32
4.78
5.36
5.76
6.34
6.79
7.32
7.84
8.4
8.76
9.3
Transcribed Image Text:10 Current (mA) - DIODE un LD Insert your measured and calculated values as well as your curves below From diode model on load line 0.84 mA 1 = Diode Current I Diode Voltage V₁ Ideal vs Non-ideal Diode Operation, with Loadline ● Ideal values loadline ● non-ideal values 0.2 Vab (V) 1.5 0 = 1.5 mA In-circuit measurement in (a) 0.4 For the load line 1.5 V power supply, use a 1 kn resistor 1.5 1k I (mA) 0 1.5 0.6 0.8 Voltage (V) - Diode ≈ 0.6 V 1.2 1 V (V) 0.39 0.4 0.449 0.482 0.504 0.554 0.616 0.652 0.673 1.6 From actual diode curve on load line 1.01 mA ≈ 0.616 V Vd I (mA) 0.008603 0.01066 0.031007 0.0625 0.1015 0.29 1.01 2.024 3.0033 6.0009 0.714 Actual 1N4148 diode Comment on the observed vs predicted values for the diode operating point. 0.6 0.63 0.64 0.66 0.66 0.67 0.68 0.69 0.69 0.7 0.71 0.71 0.71 0.72 Id (mA) 0.72 0.73 0.73 0.73 ideal diode 0.84 1.39 1.85 2.37 2.82 3.29 3.86 4.32 4.78 5.36 5.76 6.34 6.79 7.32 7.84 8.4 8.76 9.3
1 Determination the operating point of the diode
(a)
Use your 1N4148 diode (same diode as Lab 1) and set up the circuit as in Fig. 1. Set
the power supply to 1.5 V (simulating a battery) and use a 1 kn resistor in series with
the diode. Measure the diode current and the voltage drop over the diode to obtain the
experimental values for the diode operation at this point.
(b)
Plot the loadline for this circuit (R = 1 kn and V₁ = 1.5 V) and on the same graph also
plot the curve for:
(i) The ideal diode plus voltage drop model for a Si diode
(ii) The I-V curve for your actual 1N4148 diode as you measured it in Lab 1 (only
forward bias needed).
From the intersection of the two diode curves with the loadline lines determine the
operating point for the diode. How do the operating point as predicted by the diode
model compare to that from the actual diode curve ?
Compare the measured values Measure Id and Va in (a) to that graphically predicted
from the loadline.
wwwwww
Figure 1: Diode circuit
1 kn
V
A
Transcribed Image Text:1 Determination the operating point of the diode (a) Use your 1N4148 diode (same diode as Lab 1) and set up the circuit as in Fig. 1. Set the power supply to 1.5 V (simulating a battery) and use a 1 kn resistor in series with the diode. Measure the diode current and the voltage drop over the diode to obtain the experimental values for the diode operation at this point. (b) Plot the loadline for this circuit (R = 1 kn and V₁ = 1.5 V) and on the same graph also plot the curve for: (i) The ideal diode plus voltage drop model for a Si diode (ii) The I-V curve for your actual 1N4148 diode as you measured it in Lab 1 (only forward bias needed). From the intersection of the two diode curves with the loadline lines determine the operating point for the diode. How do the operating point as predicted by the diode model compare to that from the actual diode curve ? Compare the measured values Measure Id and Va in (a) to that graphically predicted from the loadline. wwwwww Figure 1: Diode circuit 1 kn V A
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