
Consider the circuit shown in Figure P2.47. Assume each diode cut−in voltage is
Figure P2.47
(a)

The values of
Answer to Problem 2.47P
The required values are,
Explanation of Solution
Given:
Diode’s cut-in voltage =
Calculation:
Assume all diode are conducting.
Draw the circuit diagram with node voltages and cut-in voltages.
Figure 1
From Figure 1, the voltage at node
The voltage at node
Write the expression for current following through diode
Substitute
Therefore, the value of the resistor,
Apply Kirchhoff’s current law at node
Substitute
Calculate the value of resistor
Substitute
Therefore, the value of the resistor
Apply Kirchhoff’s current law at node
Substitute
Calculate the value of resistor
Substitute
Therefore, the value of the resistor,
Conclusion:
Therefore, the required values are
(b)

To find: The values of
Answer to Problem 2.47P
The required values are,
Explanation of Solution
Given:
Diode’s cut-in volt- age is
Calculation:
Assume at diodes are conducting.
From Figure 1, the voltage at node
The voltage at node
Calculate the current,
Substitute
Therefore, the current following through diode
Calculate the current following through resistor
Substitute
Apply Kirchhoff’s current law at node
Substitute
Therefore, the current following diode
Calculate the current following through resistor,
Substitute
Apply Kirchhoff’s current law at node
Substitute
Therefore, the current following diode
Conclusion:
Therefore, the required values are
(c)

To find: The values of
Answer to Problem 2.47P
The require values are
Explanation of Solution
Given:
Diode’s cut-in volt- age is
Calculation:
Assume diode
Draw the current diagram with node voltage and cut-in voltages.
Figure 2
In Figure 2, the Diode
That is,
Therefore, the current following through diode
From Figure 2, the voltage at node
Apply Kirchhoff’s current law at node
Substitute
Calculate the current
Substitute
Therefore, the current following diode
From Figure 2,
Calculate the current following through resistor,
Substitute
Apply Kirchhoff’s current law at node
Substitute
Therefore, the current following diode
(d)

To find: The values of
Answer to Problem 2.47P
The required values are
Explanation of Solution
Given:
Diode’s cut-in volt- age is
Calculation:
Assume diode
Draw the circuit diagram with node voltages and cut-in voltages.
Figure 3
In Figure 3, the Diode
That is,
Therefore, the current following through diode
From Figure 1, the voltage at node
Therefore, the node voltage,
Apply Kirchhoff’s current law at node
Substitute
Calculate the current
Substitute
Therefore, the current following diode
Calculate the current following through resistor,
Substitute
Apply Kirchhoff’s current law at node
Substitute
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Chapter 2 Solutions
Microelectronics: Circuit Analysis and Design
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