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An enhancement type NMOS transistor with V1 = 0.7 V and source terminal grounded and 1.5 V applied to the gate. In what region does the device operate for VD = 0.5 V?
- a)Cut off region
- b)Saturation region
- c)Triode region
- d)None of the above
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
An enhancement type NMOS transistor with V1= 0.7 V and source terminal...
Concept:
For an NMOS transistor If;
VGS > VT and VDS < (VGS - VT) → Device is in Triode region
VGS > VT and VDS ≥ (VGS - VT) → Device is in the Saturation region
Analysis:
Given;
Vt = 0.7 V
VS = 0 V
VG = 1.5 V
VD = 0.5 V
VGS = VG - VS = 1.5 - 0 = 1.5V
VDS = VD - VS =0.5 - 0 = 0.5 V
As, VDS < (VGS - VT)
The device will be in Triode region'
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Community Answer
An enhancement type NMOS transistor with V1= 0.7 V and source terminal...
Explanation:
The given transistor is an enhancement type NMOS transistor with V1 = 0.7 V and a source terminal grounded. The gate voltage, Vg = 1.5 V, and the drain voltage, Vd = 0.5 V. We need to determine the region of operation for this transistor.
Cut-off Region:
In the cut-off region, the transistor is off and no current flows between the drain and source terminals. This occurs when the gate voltage is less than the threshold voltage (Vt) of the transistor. Since Vg = 1.5 V is greater than Vt, the transistor is not in the cut-off region.
Saturation Region:
In the saturation region, the transistor is fully on and acts as a closed switch between the drain and source terminals. This occurs when the gate voltage is greater than the threshold voltage (Vt) and the drain-source voltage (Vds) is also greater than the gate-source voltage (Vgs) minus the threshold voltage (Vt). In this case, Vds = 0.5 V and Vgs - Vt = 1.5 V - 0.7 V = 0.8 V, which means Vds is less than Vgs - Vt. Therefore, the transistor is not in the saturation region.
Triode Region:
In the triode region, the transistor operates as a linear amplifier. This occurs when the gate voltage is greater than the threshold voltage (Vt) and the drain-source voltage (Vds) is less than the gate-source voltage (Vgs) minus the threshold voltage (Vt). In this case, Vds = 0.5 V and Vgs - Vt = 1.5 V - 0.7 V = 0.8 V, which means Vds is less than Vgs - Vt. Therefore, the transistor is in the triode region of operation.
Conclusion:
Based on the given parameters, the transistor operates in the triode region for Vd = 0.5 V.
The given transistor is an enhancement type NMOS transistor with V1 = 0.7 V and a source terminal grounded. The gate voltage, Vg = 1.5 V, and the drain voltage, Vd = 0.5 V. We need to determine the region of operation for this transistor.
Cut-off Region:
In the cut-off region, the transistor is off and no current flows between the drain and source terminals. This occurs when the gate voltage is less than the threshold voltage (Vt) of the transistor. Since Vg = 1.5 V is greater than Vt, the transistor is not in the cut-off region.
Saturation Region:
In the saturation region, the transistor is fully on and acts as a closed switch between the drain and source terminals. This occurs when the gate voltage is greater than the threshold voltage (Vt) and the drain-source voltage (Vds) is also greater than the gate-source voltage (Vgs) minus the threshold voltage (Vt). In this case, Vds = 0.5 V and Vgs - Vt = 1.5 V - 0.7 V = 0.8 V, which means Vds is less than Vgs - Vt. Therefore, the transistor is not in the saturation region.
Triode Region:
In the triode region, the transistor operates as a linear amplifier. This occurs when the gate voltage is greater than the threshold voltage (Vt) and the drain-source voltage (Vds) is less than the gate-source voltage (Vgs) minus the threshold voltage (Vt). In this case, Vds = 0.5 V and Vgs - Vt = 1.5 V - 0.7 V = 0.8 V, which means Vds is less than Vgs - Vt. Therefore, the transistor is in the triode region of operation.
Conclusion:
Based on the given parameters, the transistor operates in the triode region for Vd = 0.5 V.
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An enhancement type NMOS transistor with V1= 0.7 V and source terminal grounded and 1.5 V applied to the gate. In what region does the device operate for VD= 0.5 V?a)Cut off regionb)Saturation regionc)Triode regiond)None of the aboveCorrect answer is option 'C'. Can you explain this answer?
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