The transistor in the circuit in Figure P3.27 has parameters
Figure P3.27
(a)
To sketch: A load line and labelQ -point.
To find: The region of operation of transistor.
Answer to Problem 3.27P
A load line along with Q -point is shown in Figure 1.
The transistor operates in triode region.
Explanation of Solution
Given Information:
The given circuit is shown below.
Calculation:
The value of
The value of
Applying Kirchhoff’s voltage in drain-source terminal:
Assuming the Mosfet operates in triode region:
The expression of drain current in triode region:
From equation (1):
From above calculations:
Hence, the assumption is correct and the transistor is biased in triode region.
The value of Q -point is:
The diagram of load line is sketched as follows:
From equation (1):
It is equation of straight line with negative slope.
At
At
Figure 1
(b)
To sketch: A load line and labelQ -point.
To find: The region of operation of transistor.
Answer to Problem 3.27P
A load-line along with Q -point is shown in Figure 2.
The transistor operates in triode region.
Explanation of Solution
Given Information:
The given circuit is shown below.
Calculation:
The value of
The value of
Applying Kirchhoff’s voltage in drain-source terminal:
Assuming the Mosfet operates in triode region:
The expression of drain current in triode region:
From equation (2):
From above calculations:
Hence, the assumption is correct and the transistor is biased in triode region.
The value of Q-point is:
The diagram of load line is sketched as follows:
From equation (1):
It is equation of straight line with negative slope.
At
At
Figure 2
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Chapter 3 Solutions
Microelectronics: Circuit Analysis and Design
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