Let
Figure P2.57
(a).
The values of
Answer to Problem 2.57P
Explanation of Solution
Given Information:
The given circuit is shown below.
Calculation:
Assuming the diode is in cutoff mode.
Applying voltage division rule:
The voltage across diode:
Hence, the diode is biased in reverse region. The assumption is correct and the value of diode current will be zero.
(b).
The values of
Answer to Problem 2.57P
Explanation of Solution
Given Information:
The given circuit is shown below.
Calculation:
Assuming the diode is in cutoff region.
Applying voltage division rule:
The voltage across diode:
Hence, the diode is biased in forward region. The assumption is incorrect.
Replacing the diode with its cut-in voltage:
The modified figure is:
The node AB is a super node. Applying Kirchhoff’s current law at super node:
Adding equation 1 and 2:
From equation (1):
Applying Kirchhoff’s current law at node B:
(c).
The values of
Answer to Problem 2.57P
Explanation of Solution
Given Information:
The given circuit is shown below.
Calculation:
Assuming the diode is in cutoff mode.
Applying voltage division rule:
The voltage across diode:
Hence, the diode is biased in reverse region. The assumption is correct and the value of diode current will be zero.
(d).
The values of
Answer to Problem 2.57P
Explanation of Solution
Given Information:
The given circuit is shown below.
Calculation:
Assuming the diode is in cutoff region.
Applying voltage division rule:
The voltage across diode:
Hence, the diode is biased in forward region. The assumption is incorrect.
Replacing the diode with its cut-in voltage:
The modified figure is:
The node AB is a super node. Applying Kirchhoff’s current law at super node:
Adding equation 1 and 2:
From equation (1):
Applying Kirchhoff’s current law at node B:
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Chapter 2 Solutions
Microelectronics: Circuit Analysis and Design
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