Question

3. The circuit is shown in Figure 2a and the I-V characteristic of a diode is shown in the graph Figure 2b. VD 6 4 mA 5 4 2k ? 2k ? ID Figure 2a Device Current (mA) 3 2 1 0 0 1 2 3 4 5 Device Voltage (V) Figure 2b (a) Describe what is operating point and why it is important to set the component values that allows the circuit to operate within the operating point. (b) Using graphical load-line analysis, determine the operating point ($I_D$ and $V_D$) of the diode. Show your work on the graph, scan it and attach it with the answer sheet. (c) Write the load-line equation of the circuit. (d) Calculate the value of the diode small-signal resistance, $r_d$. (2) (5) (3) (2)

          3. The circuit is shown in Figure 2a and the I-V characteristic of a diode is shown in the
graph Figure 2b.
VD
6
4 mA
5
4
2k ?
2k ?
ID
Figure 2a
Device Current (mA)
3
2
1
0
0
1
2
3
4
5
Device Voltage (V)
Figure 2b
(a) Describe what is operating point and why it is important to set the component
values that allows the circuit to operate within the operating point.
(b) Using graphical load-line analysis, determine the operating point ($I_D$ and $V_D$) of the
diode. Show your work on the graph, scan it and attach it with the answer sheet.
(c) Write the load-line equation of the circuit.
(d) Calculate the value of the diode small-signal resistance, $r_d$.
(2)
(5)
(3)
(2)

3. The circuit is shown in Figure 2a and the I-V characteristic of a diode is shown in the
graph Figure 2b.
VD
6
4 mA
5
4
2k ?
2k ?
ID
Figure 2a
Device Current (mA)
3
2
1
0
0
1
2
3
4
5
Device Voltage (V)
Figure 2b
(a) Describe what is operating point and why it is important to set the component
values that allows the circuit to operate within the operating point.
(b) Using graphical load-line analysis, determine the operating point (ID and VD) of the
diode. Show your work on the graph, scan it and attach it with the answer sheet.
(c) Write the load-line equation of the circuit.
(d) Calculate the value of the diode small-signal resistance, rd.
(2)
(5)
(3)
(2)

Added by Beverly J.

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