The NMOS devices described in Exercise TYU 3.1 have parameters
(a)
To find:Conduction parameter for the given NMOS devices.
Answer to Problem 3.2TYU
The conduction parameter for the NMOS devices is
Explanation of Solution
Given Information
Two MOSFETS, first one being an n-channel enhancement mode MOSFET with threshold voltage
The device parameters for both the MOSFETS are
Calculation:
The conduction parameter of an n-channel MOSFET,
Here,
The oxide permittivity for silicon devices is
Substituting the given parameters and the permittivity, the conduction parameter can be obtained as,
(b)
To find: The drain currents for the two NMOS devices with each of the bias conditions.
Answer to Problem 3.2TYU
The drain current of the enhancement MOSFET for each bias conditions in the order of the given drain to source voltages is,
Case 1:
Case 2:
Case 3:
The drain current of the depletion mode MOSFET for each bias conditions in the order of the given drain to source voltages is,
Case 1:
Case 2:
Case 3:
Explanation of Solution
Given Information
Two MOSFETS, first one being an n-channel enhancement mode MOSFET with threshold voltage
The device parameters for both the MOSFETS are
Calculation
Consider the first n-channel device which is enhancement type MOSFET with threshold voltage
The drain current of the device is given by different expression based on the bias conditions .
For non-saturation condition, the expression is,
For saturation condition, the expression is
Here, the parameter
Now, consider each of the biasing conditions.
Case 1 : For the bias voltage of
Case 2 : For the bias voltage of
Case 3 : For the bias voltage of
Now, consider the second n-channel device which is depletion type MOSFET with threshold voltage
The drain current of the device is given by different expression based on the bias conditions .
For non-saturation condition, the expression is,
For saturation condition, the expression is
Here, the parameter
Now, consider each of the biasing conditions.
Case 1 : For the bias voltage of
Case 2 : For the bias voltage of
Case 3 : For the bias voltage of
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